diff --git a/package.json b/package.json
index da3a9d3ebd66ee..0e54bde2d64075 100644
--- a/package.json
+++ b/package.json
@@ -89,7 +89,7 @@
     "**/isomorphic-fetch/node-fetch": "^2.6.7",
     "**/remark-parse/trim": "1.0.1",
     "**/sharp": "0.32.6",
-    "**/typescript": "4.7.4",
+    "**/typescript": "4.9.5",
     "globby/fast-glob": "^3.2.11"
   },
   "dependencies": {
@@ -1677,7 +1677,7 @@
     "tree-kill": "^1.2.2",
     "ts-morph": "^15.1.0",
     "tsd": "^0.20.0",
-    "typescript": "4.7.4",
+    "typescript": "4.9.5",
     "url-loader": "^2.2.0",
     "val-loader": "^1.1.1",
     "vinyl-fs": "^4.0.0",
diff --git a/packages/analytics/client/src/analytics_client/analytics_client.ts b/packages/analytics/client/src/analytics_client/analytics_client.ts
index 1029a87f2b9355..6844882459c84c 100644
--- a/packages/analytics/client/src/analytics_client/analytics_client.ts
+++ b/packages/analytics/client/src/analytics_client/analytics_client.ts
@@ -168,6 +168,7 @@ export class AnalyticsClient implements IAnalyticsClient {
     this.optInConfig$.next(optInConfigInstance);
   };
 
+  // @ts-expect-error upgrade typescript v4.9.5
   public registerContextProvider = <Context>(contextProviderOpts: ContextProviderOpts<Context>) => {
     this.contextService.registerContextProvider(contextProviderOpts);
   };
diff --git a/packages/analytics/client/src/analytics_client/context_service.ts b/packages/analytics/client/src/analytics_client/context_service.ts
index 9f1bd40d15ee8f..75074c94a3fc0b 100644
--- a/packages/analytics/client/src/analytics_client/context_service.ts
+++ b/packages/analytics/client/src/analytics_client/context_service.ts
@@ -30,7 +30,7 @@ export class ContextService {
   public registerContextProvider<Context>({
     name,
     context$,
-    schema,
+    schema, // @ts-expect-error upgrade typescript v4.9.5
   }: ContextProviderOpts<Context>) {
     if (this.contextProvidersSubscriptions.has(name)) {
       throw new Error(`Context provider with name '${name}' already registered`);
@@ -60,6 +60,7 @@ export class ContextService {
       .subscribe((context) => {
         // We store each context linked to the context provider so they can increase and reduce
         // the number of fields they report without having left-overs in the global context.
+        // @ts-expect-error upgrade typescript v4.9.5
         this.contextProvidersRegistry.set(name, context);
 
         // For every context change, we rebuild the global context.
diff --git a/packages/analytics/client/src/analytics_client/types.ts b/packages/analytics/client/src/analytics_client/types.ts
index 5726bf00466879..8188ecde861616 100644
--- a/packages/analytics/client/src/analytics_client/types.ts
+++ b/packages/analytics/client/src/analytics_client/types.ts
@@ -205,6 +205,7 @@ export interface IAnalyticsClient {
    *
    * @track-adoption
    */
+  // @ts-expect-error upgrade typescript v4.9.5
   registerContextProvider: <Context>(contextProviderOpts: ContextProviderOpts<Context>) => void;
   /**
    * Removes the context provider and stop enriching the events from its context.
diff --git a/packages/content-management/content_editor/src/__jest__/tests.helpers.tsx b/packages/content-management/content_editor/src/__jest__/tests.helpers.tsx
index d71b237010c1ce..78097e6223e023 100644
--- a/packages/content-management/content_editor/src/__jest__/tests.helpers.tsx
+++ b/packages/content-management/content_editor/src/__jest__/tests.helpers.tsx
@@ -32,6 +32,7 @@ export function WithServices<P>(Comp: ComponentType<P>, overrides: Partial<Servi
     const services = getMockServices(overrides);
     return (
       <ContentEditorProvider {...services}>
+        {/* @ts-expect-error upgrade typescript v4.9.5*/}
         <Comp {...props} />
       </ContentEditorProvider>
     );
diff --git a/packages/core/http/core-http-router-server-internal/src/validator.ts b/packages/core/http/core-http-router-server-internal/src/validator.ts
index 3294c4a6dcc637..8e9f700915e1a3 100644
--- a/packages/core/http/core-http-router-server-internal/src/validator.ts
+++ b/packages/core/http/core-http-router-server-internal/src/validator.ts
@@ -127,8 +127,10 @@ export class RouteValidator<P = {}, Q = {}, B = {}> {
     namespace?: string
   ): RouteValidationResultType<typeof validationRule> {
     if (isConfigSchema(validationRule)) {
+      // @ts-expect-error upgrade typescript v4.9.5
       return validationRule.validate(data, {}, namespace);
     } else if (typeof validationRule === 'function') {
+      // @ts-expect-error upgrade typescript v4.9.5
       return this.validateFunction(validationRule, data, namespace);
     } else {
       throw new ValidationError(
diff --git a/packages/core/http/core-http-server-internal/src/cookie_session_storage.ts b/packages/core/http/core-http-server-internal/src/cookie_session_storage.ts
index bba5a9742edb61..94dbd10970cc57 100644
--- a/packages/core/http/core-http-server-internal/src/cookie_session_storage.ts
+++ b/packages/core/http/core-http-server-internal/src/cookie_session_storage.ts
@@ -113,6 +113,7 @@ export async function createCookieSessionStorageFactory<T>(
 
   return {
     asScoped(request: KibanaRequest) {
+      // @ts-expect-error upgrade typescript v4.9.5
       return new ScopedCookieSessionStorage<T>(log, server, ensureRawRequest(request));
     },
   };
diff --git a/packages/core/plugins/core-plugins-server-internal/src/create_browser_config.ts b/packages/core/plugins/core-plugins-server-internal/src/create_browser_config.ts
index 05844839934b28..5d11064567479e 100644
--- a/packages/core/plugins/core-plugins-server-internal/src/create_browser_config.ts
+++ b/packages/core/plugins/core-plugins-server-internal/src/create_browser_config.ts
@@ -61,7 +61,6 @@ function checkIsPathExposed<T = unknown>(
     // Traverse the path to see if it is exposed or not
     const exposedConfig = descriptor[key as keyof ExposedToBrowserDescriptor<T>];
     if (exposedConfig && typeof exposedConfig === 'object') {
-      // @ts-expect-error Type 'undefined' is not assignable to type 'ExposedToBrowserDescriptor<T>'
       descriptor = exposedConfig;
       continue;
     }
diff --git a/packages/core/saved-objects/core-saved-objects-api-server-internal/src/lib/apis/bulk_update.ts b/packages/core/saved-objects/core-saved-objects-api-server-internal/src/lib/apis/bulk_update.ts
index 9c119ff86e7ddb..b195141924659a 100644
--- a/packages/core/saved-objects/core-saved-objects-api-server-internal/src/lib/apis/bulk_update.ts
+++ b/packages/core/saved-objects/core-saved-objects-api-server-internal/src/lib/apis/bulk_update.ts
@@ -262,6 +262,7 @@ export const performBulkUpdate = async <T>(
 
       const typeDefinition = registry.getType(type)!;
       const updatedAttributes = mergeForUpdate({
+        // @ts-expect-error upgrade typescript v4.9.5
         targetAttributes: {
           ...migrated!.attributes,
         },
diff --git a/packages/core/saved-objects/core-saved-objects-api-server-internal/src/lib/apis/update.ts b/packages/core/saved-objects/core-saved-objects-api-server-internal/src/lib/apis/update.ts
index 61f9cb4cfdb273..e25320f8a842e2 100644
--- a/packages/core/saved-objects/core-saved-objects-api-server-internal/src/lib/apis/update.ts
+++ b/packages/core/saved-objects/core-saved-objects-api-server-internal/src/lib/apis/update.ts
@@ -247,6 +247,7 @@ export const executeUpdate = async <T>(
     // therefor we can safely process with the "standard" update sequence.
 
     const updatedAttributes = mergeForUpdate({
+      // @ts-expect-error upgrade typescript v4.9.5
       targetAttributes: {
         ...migrated!.attributes,
       },
diff --git a/packages/kbn-apm-synthtrace-client/src/lib/interval.ts b/packages/kbn-apm-synthtrace-client/src/lib/interval.ts
index bf08344f4de9e8..bb77e6f6ee350f 100644
--- a/packages/kbn-apm-synthtrace-client/src/lib/interval.ts
+++ b/packages/kbn-apm-synthtrace-client/src/lib/interval.ts
@@ -32,7 +32,7 @@ interface IntervalOptions {
   rate?: number;
 }
 
-export class Interval<TFields = Fields> {
+export class Interval<TFields extends Fields = Fields> {
   private readonly intervalAmount: number;
   private readonly intervalUnit: unitOfTime.DurationConstructor;
 
@@ -63,7 +63,7 @@ export class Interval<TFields = Fields> {
     return timestamps;
   }
 
-  *generator<TGeneratedFields = TFields>(
+  *generator<TGeneratedFields extends Fields = TFields>(
     map: (
       timestamp: number,
       index: number
diff --git a/packages/kbn-apm-synthtrace/src/lib/shared/get_serialize_transform.ts b/packages/kbn-apm-synthtrace/src/lib/shared/get_serialize_transform.ts
index ed93c9502b722d..3384a847db6b2e 100644
--- a/packages/kbn-apm-synthtrace/src/lib/shared/get_serialize_transform.ts
+++ b/packages/kbn-apm-synthtrace/src/lib/shared/get_serialize_transform.ts
@@ -37,6 +37,7 @@ export function getSerializeTransform<TFields = ApmFields>() {
         push(this, nextEvents, nextCallback);
       }
     },
+    // @ts-expect-error upgrade typescript v4.9.5
     write(chunk: Serializable<TFields>, encoding, callback) {
       push(this, chunk.serialize(), callback);
     },
diff --git a/packages/kbn-apm-synthtrace/src/lib/utils/with_client.ts b/packages/kbn-apm-synthtrace/src/lib/utils/with_client.ts
index 68dc780ac64646..5acbcdfbbd9f35 100644
--- a/packages/kbn-apm-synthtrace/src/lib/utils/with_client.ts
+++ b/packages/kbn-apm-synthtrace/src/lib/utils/with_client.ts
@@ -12,7 +12,9 @@ import { ApmSynthtraceEsClient, LogsSynthtraceEsClient } from '../../..';
 
 export type SynthtraceEsClient = ApmSynthtraceEsClient | LogsSynthtraceEsClient;
 export type SynthGenerator<TFields> =
+  // @ts-expect-error upgrade typescript v4.9.5
   | SynthtraceGenerator<TFields>
+  // @ts-expect-error upgrade typescript v4.9.5
   | Array<SynthtraceGenerator<TFields>>
   | Readable;
 
diff --git a/packages/kbn-es-types/src/search.ts b/packages/kbn-es-types/src/search.ts
index 4351ac91e5c170..df8d24e6974689 100644
--- a/packages/kbn-es-types/src/search.ts
+++ b/packages/kbn-es-types/src/search.ts
@@ -593,7 +593,8 @@ export type AggregateOf<
 
 export type AggregateOfMap<TAggregationMap extends AggregationMap | undefined, TDocument> = {
   [TAggregationName in keyof TAggregationMap]: Required<TAggregationMap>[TAggregationName] extends AggregationsAggregationContainer
-    ? AggregateOf<TAggregationMap[TAggregationName], TDocument>
+    ? // @ts-expect-error not sure how to fix this, anything I've tried causes errors upstream - Dario
+      AggregateOf<TAggregationMap[TAggregationName], TDocument>
     : never; // using never means we effectively ignore optional keys, using {} creates a union type of { ... } | {}
 };
 
diff --git a/packages/kbn-io-ts-utils/src/to_json_schema/index.ts b/packages/kbn-io-ts-utils/src/to_json_schema/index.ts
index 702c0150d07f74..ee595ae6de6d17 100644
--- a/packages/kbn-io-ts-utils/src/to_json_schema/index.ts
+++ b/packages/kbn-io-ts-utils/src/to_json_schema/index.ts
@@ -7,7 +7,7 @@
  */
 import * as t from 'io-ts';
 import { mapValues } from 'lodash';
-import { isParsableType } from '../parseable_types';
+import { isParsableType, ParseableType } from '../parseable_types';
 
 interface JSONSchemaObject {
   type: 'object';
@@ -45,7 +45,7 @@ type JSONSchema =
   | JSONSchemaAllOf
   | JSONSchemaAnyOf;
 
-export const toJsonSchema = (type: t.Mixed): JSONSchema => {
+export const toJsonSchema = (type: t.Type<any> | ParseableType): JSONSchema => {
   if (isParsableType(type)) {
     switch (type._tag) {
       case 'ArrayType':
diff --git a/packages/kbn-optimizer/src/common/obj_helpers.ts b/packages/kbn-optimizer/src/common/obj_helpers.ts
index f238eb22e93a11..bf8d60a363f282 100644
--- a/packages/kbn-optimizer/src/common/obj_helpers.ts
+++ b/packages/kbn-optimizer/src/common/obj_helpers.ts
@@ -8,7 +8,7 @@
 
 export function omit<T, K extends keyof T>(obj: T, keys: K[]): Omit<T, K> {
   const result: any = {};
-  for (const [key, value] of Object.entries(obj) as any) {
+  for (const [key, value] of Object.entries(obj as any) as any) {
     if (!keys.includes(key)) {
       result[key] = value;
     }
diff --git a/packages/kbn-securitysolution-io-ts-alerting-types/src/threat_mapping/index.test.ts b/packages/kbn-securitysolution-io-ts-alerting-types/src/threat_mapping/index.test.ts
index 6e2e671dbb0296..fb5db89dbb2292 100644
--- a/packages/kbn-securitysolution-io-ts-alerting-types/src/threat_mapping/index.test.ts
+++ b/packages/kbn-securitysolution-io-ts-alerting-types/src/threat_mapping/index.test.ts
@@ -42,6 +42,7 @@ describe('threat_mapping', () => {
           field: 'field.one',
           type: 'mapping',
           value: 'field.one',
+          // @ts-expect-error upgrade typescript v4.9.5
           extra: 'blah',
         },
       ];
@@ -120,6 +121,7 @@ describe('threat_mapping', () => {
             value: 'field.one',
           },
         ],
+        // @ts-expect-error upgrade typescript v4.9.5
         extra: 'invalid',
       },
     ];
@@ -140,6 +142,7 @@ describe('threat_mapping', () => {
             field: 'field.one',
             type: 'mapping',
             value: 'field.one',
+            // @ts-expect-error upgrade typescript v4.9.5
             extra: 'blah',
           },
         ],
diff --git a/packages/kbn-securitysolution-utils/src/add_remove_id_to_item/index.ts b/packages/kbn-securitysolution-utils/src/add_remove_id_to_item/index.ts
index 37a58438e62f24..d08b2f54e6e7e6 100644
--- a/packages/kbn-securitysolution-utils/src/add_remove_id_to_item/index.ts
+++ b/packages/kbn-securitysolution-utils/src/add_remove_id_to_item/index.ts
@@ -19,6 +19,7 @@ import { v4 as uuidv4 } from 'uuid';
  */
 type NotArray<T> = T extends unknown[] ? never : T;
 export const addIdToItem = <T>(item: NotArray<T>): T => {
+  // @ts-expect-error upgrade typescript v4.9.5
   const maybeId: typeof item & { id?: string } = item;
   if (maybeId.id != null) {
     return item;
@@ -41,6 +42,7 @@ export const removeIdFromItem = <T>(
       },
       Exclude<keyof T, 'id'>
     > => {
+  // @ts-expect-error upgrade typescript v4.9.5
   const maybeId: typeof item & { id?: string } = item;
   if (maybeId.id != null) {
     const { id, ...noId } = maybeId;
diff --git a/packages/kbn-server-route-repository/src/test_types.ts b/packages/kbn-server-route-repository/src/test_types.ts
index 46e9a258c0b35f..4cfd82de450b8c 100644
--- a/packages/kbn-server-route-repository/src/test_types.ts
+++ b/packages/kbn-server-route-repository/src/test_types.ts
@@ -69,11 +69,10 @@ createServerRouteFactory<{}, { options: { tags: string[] } }>()({
 });
 
 // Public APIs should be versioned
+// @ts-expect-error
 createServerRouteFactory<{}, { options: { tags: string[] } }>()({
-  // @ts-expect-error
   endpoint: 'GET /api/endpoint_with_params',
   options: {
-    // @ts-expect-error
     tags: [],
   },
   // @ts-expect-error
diff --git a/packages/kbn-telemetry-tools/src/tools/ts_program/ts_program.test.ts b/packages/kbn-telemetry-tools/src/tools/ts_program/ts_program.test.ts
index 7e15de907e31a3..72910fbe99fc45 100644
--- a/packages/kbn-telemetry-tools/src/tools/ts_program/ts_program.test.ts
+++ b/packages/kbn-telemetry-tools/src/tools/ts_program/ts_program.test.ts
@@ -21,7 +21,7 @@ describe('createKibanaProgram', () => {
             "fetch": Object {
               "typeDescriptor": Object {
                 "locale": Object {
-                  "kind": 150,
+                  "kind": 152,
                   "type": "StringKeyword",
                 },
               },
diff --git a/packages/kbn-utility-types/src/dot.ts b/packages/kbn-utility-types/src/dot.ts
index 7880e1e8dab969..e39ca10b8cc5f6 100644
--- a/packages/kbn-utility-types/src/dot.ts
+++ b/packages/kbn-utility-types/src/dot.ts
@@ -41,7 +41,9 @@ type DotKey<
   TKey extends keyof TObject & string,
   TPrefix extends string
 > = TObject[TKey] extends Array<infer TValueType>
-  ? ToArray<DotObject<TValueType, `${TPrefix}${TKey}.`>>
+  ? TValueType extends Record<string, any>
+    ? ToArray<DotObject<TValueType, `${TPrefix}${TKey}.`>>
+    : never
   : TObject[TKey] extends Record<string, any>
   ? DotObject<TObject[TKey], `${TPrefix}${TKey}.`>
   : { [key in `${TPrefix}${TKey}`]: TObject[TKey] };
diff --git a/packages/shared-ux/router/impl/routes.tsx b/packages/shared-ux/router/impl/routes.tsx
index 58dca46f1c0250..80d4da6178ae2e 100644
--- a/packages/shared-ux/router/impl/routes.tsx
+++ b/packages/shared-ux/router/impl/routes.tsx
@@ -30,9 +30,12 @@ export const Routes = ({
         if (React.isValidElement(child) && child.type === LegacyRoute) {
           const path = replace(child?.props.path, match.url + '/', '');
           const renderFunction =
+            // @ts-expect-error upgrade typescript v4.9.5
             typeof child?.props.children === 'function'
-              ? child?.props.children
-              : child?.props.render;
+              ? // @ts-expect-error upgrade typescript v4.9.5
+                child?.props.children
+              : // @ts-expect-error upgrade typescript v4.9.5
+                child?.props.render;
 
           return (
             <Route
@@ -40,6 +43,7 @@ export const Routes = ({
               element={
                 <>
                   <MatchPropagator />
+                  {/* @ts-expect-error upgrade typescript v4.9.5*/}
                   {(child?.props?.component && <child.props.component />) ||
                     (renderFunction && renderFunction()) ||
                     children}
diff --git a/src/core/server/mocks.ts b/src/core/server/mocks.ts
index b76a9c37dd6dab..1294bc56ead54c 100644
--- a/src/core/server/mocks.ts
+++ b/src/core/server/mocks.ts
@@ -143,6 +143,7 @@ export type CustomRequestHandlerMock<T> = {
 };
 
 const createCustomRequestHandlerContextMock = <T>(contextParts: T): CustomRequestHandlerMock<T> => {
+  // @ts-expect-error upgrade typescript v4.9.5
   const mock = Object.entries(contextParts).reduce(
     (context, [key, value]) => {
       // @ts-expect-error type matching from inferred types is hard
diff --git a/src/dev/build/tasks/fetch_agent_versions_list.ts b/src/dev/build/tasks/fetch_agent_versions_list.ts
index fc5e90001bca40..2dc916e734429a 100644
--- a/src/dev/build/tasks/fetch_agent_versions_list.ts
+++ b/src/dev/build/tasks/fetch_agent_versions_list.ts
@@ -72,7 +72,7 @@ export const FetchAgentVersionsList: Task = {
     const versionsList = await getAvailableVersions(log);
     const AGENT_VERSION_BUILD_FILE = 'x-pack/plugins/fleet/target/agent_versions_list.json';
 
-    if (versionsList !== []) {
+    if (versionsList.length !== 0) {
       log.info(`Writing versions list to ${AGENT_VERSION_BUILD_FILE}`);
       await write(
         build.resolvePath(AGENT_VERSION_BUILD_FILE),
diff --git a/src/dev/code_coverage/ingest_coverage/__tests__/mocks/team_assign_mock.txt b/src/dev/code_coverage/ingest_coverage/__tests__/mocks/team_assign_mock.txt
index 15d3eb058bcf3a..b04178ec71c6f3 100644
--- a/src/dev/code_coverage/ingest_coverage/__tests__/mocks/team_assign_mock.txt
+++ b/src/dev/code_coverage/ingest_coverage/__tests__/mocks/team_assign_mock.txt
@@ -61,9 +61,6 @@ x-pack/plugins/lens/public/datatable_visualization/expression.tsx kibana-app
 x-pack/plugins/lens/public/datatable_visualization/index.ts kibana-app
 x-pack/plugins/lens/public/datatable_visualization/visualization.test.tsx kibana-app
 x-pack/plugins/lens/public/datatable_visualization/visualization.tsx kibana-app
-x-pack/plugins/lens/public/debounced_component/debounced_component.test.tsx kibana-app
-x-pack/plugins/lens/public/debounced_component/debounced_component.tsx kibana-app
-x-pack/plugins/lens/public/debounced_component/index.ts kibana-app
 x-pack/plugins/lens/public/drag_drop/drag_drop.test.tsx kibana-app
 x-pack/plugins/lens/public/drag_drop/drag_drop.tsx kibana-app
 x-pack/plugins/lens/public/drag_drop/index.ts kibana-app
diff --git a/src/plugins/chart_expressions/expression_legacy_metric/public/__stories__/metric_renderer.stories.tsx b/src/plugins/chart_expressions/expression_legacy_metric/public/__stories__/metric_renderer.stories.tsx
index ba2835806f4f51..72e52ef303f4c2 100644
--- a/src/plugins/chart_expressions/expression_legacy_metric/public/__stories__/metric_renderer.stories.tsx
+++ b/src/plugins/chart_expressions/expression_legacy_metric/public/__stories__/metric_renderer.stories.tsx
@@ -10,7 +10,7 @@ import React from 'react';
 import { storiesOf } from '@storybook/react';
 import { from } from 'rxjs';
 import { ExpressionValueVisDimension } from '@kbn/visualizations-plugin/common';
-import { Datatable, DatatableColumn } from '@kbn/expressions-plugin/common';
+import { Datatable, DatatableColumn, TextAlignment } from '@kbn/expressions-plugin/common';
 import { Render } from '@kbn/presentation-util-plugin/public/__stories__';
 import { ColorMode, CustomPaletteState } from '@kbn/charts-plugin/common';
 import { getFormatService } from '../__mocks__/format_service';
@@ -209,7 +209,11 @@ storiesOf('renderers/visMetric', module)
               },
               labels: {
                 show: false,
-                style: { spec: { fontSize: '60px', align: 'left' }, type: 'style', css: '' },
+                style: {
+                  spec: { fontSize: '60px', textAlign: TextAlignment.LEFT },
+                  type: 'style',
+                  css: '',
+                },
                 position: LabelPosition.TOP,
               },
             },
diff --git a/src/plugins/chart_expressions/expression_legacy_metric/public/components/with_auto_scale.tsx b/src/plugins/chart_expressions/expression_legacy_metric/public/components/with_auto_scale.tsx
index 2f67094fdc4edc..36093abaddf5a4 100644
--- a/src/plugins/chart_expressions/expression_legacy_metric/public/components/with_auto_scale.tsx
+++ b/src/plugins/chart_expressions/expression_legacy_metric/public/components/with_auto_scale.tsx
@@ -63,10 +63,13 @@ function hasAutoscaleProps<T>(props: T): props is T & AutoScaleProps {
   return false;
 }
 
-function getWrappedComponentProps<T>(props: T) {
+function getWrappedComponentProps<T>(props: T): T {
   if (hasAutoscaleProps(props)) {
-    const { autoScaleParams, renderComplete, ...rest } = props;
-    return rest;
+    return {
+      ...props,
+      autoScaleParams: undefined,
+      renderComplete: undefined,
+    };
   }
 
   return props;
@@ -132,7 +135,7 @@ export function withAutoScale<T>(WrappedComponent: ComponentType<T>) {
               : {}),
           }}
         >
-          <WrappedComponent {...(restProps as T)} />
+          <WrappedComponent {...restProps} />
         </div>
       </div>
     );
diff --git a/src/plugins/data_view_management/public/components/test_utils.tsx b/src/plugins/data_view_management/public/components/test_utils.tsx
index 8970595513e043..4a7fec97e32810 100644
--- a/src/plugins/data_view_management/public/components/test_utils.tsx
+++ b/src/plugins/data_view_management/public/components/test_utils.tsx
@@ -21,6 +21,7 @@ export function createComponentWithContext<Props = Record<string, any>>(
     services: PropTypes.object,
   };
 
+  // @ts-expect-error upgrade typescript v4.9.5
   return shallow(<MyComponent {...props} />, {
     context: {
       services: mockedContext,
diff --git a/src/plugins/embeddable/public/lib/embeddables/embeddable_factory.ts b/src/plugins/embeddable/public/lib/embeddables/embeddable_factory.ts
index a96287a61d0f38..cb777aecb53b8e 100644
--- a/src/plugins/embeddable/public/lib/embeddables/embeddable_factory.ts
+++ b/src/plugins/embeddable/public/lib/embeddables/embeddable_factory.ts
@@ -65,6 +65,7 @@ export interface EmbeddableFactory<
    */
   readonly isEditable: () => Promise<boolean>;
 
+  // @ts-expect-error upgrade typescript v4.9.5
   readonly savedObjectMetaData?: SavedObjectMetaData<TSavedObjectAttributes>;
 
   /**
diff --git a/src/plugins/embeddable/public/registry/saved_object_to_panel_methods.ts b/src/plugins/embeddable/public/registry/saved_object_to_panel_methods.ts
index 2d996666d40426..1647cb6215533d 100644
--- a/src/plugins/embeddable/public/registry/saved_object_to_panel_methods.ts
+++ b/src/plugins/embeddable/public/registry/saved_object_to_panel_methods.ts
@@ -9,6 +9,7 @@
 import { SavedObjectCommon } from '@kbn/saved-objects-finder-plugin/common';
 
 type SavedObjectToPanelMethod<TSavedObjectAttributes, TByValueInput> = (
+  // @ts-expect-error upgrade typescript v4.9.5
   savedObject: SavedObjectCommon<TSavedObjectAttributes>
 ) => { savedObjectId: string } | Partial<TByValueInput>;
 
diff --git a/src/plugins/es_ui_shared/static/forms/hook_form_lib/components/use_field.tsx b/src/plugins/es_ui_shared/static/forms/hook_form_lib/components/use_field.tsx
index 86af10f08cc23a..d66348d39feae9 100644
--- a/src/plugins/es_ui_shared/static/forms/hook_form_lib/components/use_field.tsx
+++ b/src/plugins/es_ui_shared/static/forms/hook_form_lib/components/use_field.tsx
@@ -13,6 +13,7 @@ import { useFieldFromProps } from '../hooks';
 
 export interface Props<T, FormType = FormData, I = T> {
   path: string;
+  // @ts-expect-error upgrade typescript v4.9.5
   config?: FieldConfig<T, FormType, I>;
   defaultValue?: T;
   component?: FunctionComponent<any>;
diff --git a/src/plugins/es_ui_shared/static/forms/hook_form_lib/hooks/use_field.ts b/src/plugins/es_ui_shared/static/forms/hook_form_lib/hooks/use_field.ts
index 6ce084cb750b44..324a2ea1255a8d 100644
--- a/src/plugins/es_ui_shared/static/forms/hook_form_lib/hooks/use_field.ts
+++ b/src/plugins/es_ui_shared/static/forms/hook_form_lib/hooks/use_field.ts
@@ -31,8 +31,10 @@ const errorsToString = (errors: ValidationError[]): string[] | null => {
 };
 
 export const useField = <T, FormType = FormData, I = T>(
+  // @ts-expect-error upgrade typescript v4.9.5
   form: FormHook<FormType>,
   path: string,
+  // @ts-expect-error upgrade typescript v4.9.5
   config: FieldConfig<T, FormType, I> & InternalFieldConfig<T>,
   valueChangeListener?: (value: I) => void,
   errorChangeListener?: (errors: string[] | null) => void,
@@ -231,7 +233,7 @@ export const useField = <T, FormType = FormData, I = T>(
       // -- helpers
       const doByPassValidation = ({
         type: validationType,
-        isBlocking,
+        isBlocking, // @ts-expect-error upgrade typescript v4.9.5
       }: ValidationConfig<FormType, string, I>) => {
         if (validationType !== undefined && validationType !== validationTypeToValidate) {
           return true;
@@ -246,6 +248,7 @@ export const useField = <T, FormType = FormData, I = T>(
 
       const enhanceValidationError = (
         validationError: ValidationError,
+        // @ts-expect-error upgrade typescript v4.9.5
         validation: ValidationConfig<FormType, string, I>,
         validationType: string
       ) => ({
@@ -275,6 +278,7 @@ export const useField = <T, FormType = FormData, I = T>(
           inflightValidation.current = validator({
             value: valueToValidate,
             errors: validationErrors,
+            // @ts-expect-error upgrade typescript v4.9.5
             form: { getFormData, getFields },
             formData,
             path,
@@ -318,6 +322,7 @@ export const useField = <T, FormType = FormData, I = T>(
           const validationResult = validator({
             value: valueToValidate,
             errors: validationErrors,
+            // @ts-expect-error upgrade typescript v4.9.5
             form: { getFormData, getFields },
             formData,
             path,
diff --git a/src/plugins/es_ui_shared/static/forms/hook_form_lib/hooks/use_field_from_props.ts b/src/plugins/es_ui_shared/static/forms/hook_form_lib/hooks/use_field_from_props.ts
index a3d36fd534b5db..4fbe65931b984d 100644
--- a/src/plugins/es_ui_shared/static/forms/hook_form_lib/hooks/use_field_from_props.ts
+++ b/src/plugins/es_ui_shared/static/forms/hook_form_lib/hooks/use_field_from_props.ts
@@ -21,6 +21,7 @@ import { useField, InternalFieldConfig } from './use_field';
 export const useFieldFromProps = <T, FormType, I>(
   props: UseFieldProps<T, FormType, I>
 ): { field: FieldHook<T, I>; propsToForward: { [x: string]: unknown } } => {
+  // @ts-expect-error upgrade typescript v4.9.5
   const form = useFormContext<FormType>();
   const { getFieldDefaultValue, __readFieldConfigFromSchema, __updateDefaultValueAt } = form;
 
@@ -71,6 +72,7 @@ export const useFieldFromProps = <T, FormType, I>(
     return value === undefined ? ('' as unknown as T) : value;
   }, [defaultValue, path, config, readDefaultValueOnForm, getFieldDefaultValue]);
 
+  // @ts-expect-error upgrade typescript v4.9.5
   const fieldConfig = useMemo<FieldConfig<T, FormType, I> & InternalFieldConfig<T>>(
     () => ({
       ...config,
diff --git a/src/plugins/es_ui_shared/static/forms/hook_form_lib/types.ts b/src/plugins/es_ui_shared/static/forms/hook_form_lib/types.ts
index 22b9fdc6229a77..a7cc46717b1792 100644
--- a/src/plugins/es_ui_shared/static/forms/hook_form_lib/types.ts
+++ b/src/plugins/es_ui_shared/static/forms/hook_form_lib/types.ts
@@ -101,6 +101,7 @@ export interface FormHook<T extends FormData = FormData, I extends FormData = T>
     InternalFieldType = FieldType
   >(
     fieldPath: string
+    // @ts-expect-error upgrade typescript v4.9.5
   ) => FieldConfig<FieldType, FormType, InternalFieldType> | undefined;
   __getFormDefaultValue: () => I | undefined;
   __getFieldsRemoved: () => FieldsMap;
diff --git a/src/plugins/expressions/common/execution/execution_contract.ts b/src/plugins/expressions/common/execution/execution_contract.ts
index 34e11ad4c4948e..50dda43661367f 100644
--- a/src/plugins/expressions/common/execution/execution_contract.ts
+++ b/src/plugins/expressions/common/execution/execution_contract.ts
@@ -17,7 +17,11 @@ import { ExpressionAstExpression } from '../ast';
  * `ExecutionContract` is a wrapper around `Execution` class. It provides the
  * same functionality but does not expose Expressions plugin internals.
  */
-export class ExecutionContract<Input = unknown, Output = unknown, InspectorAdapters = unknown> {
+export class ExecutionContract<
+  Input = unknown,
+  Output = unknown,
+  InspectorAdapters extends Adapters = object
+> {
   public get isPending(): boolean {
     const { state, result } = this.execution.state.get();
     const finished = state === 'error' || (state === 'result' && !result?.partial);
diff --git a/src/plugins/files/server/routes/file_kind/enhance_router.ts b/src/plugins/files/server/routes/file_kind/enhance_router.ts
index 87be1c4e08ea05..d1757ab51e2cda 100644
--- a/src/plugins/files/server/routes/file_kind/enhance_router.ts
+++ b/src/plugins/files/server/routes/file_kind/enhance_router.ts
@@ -26,6 +26,7 @@ export function enhanceRouter({ router, fileKind }: Args): FileKindRouter {
   const handlerWrapper: (handler: FileKindHandler) => FileKindHandler =
     (handler) => async (ctx, req, res) => {
       return handler(
+        // @ts-expect-error upgrade typescript v4.9.5
         Object.create(ctx, { fileKind: { value: fileKind, enumerable: true, writeable: false } }),
         req,
         res
diff --git a/src/plugins/files/server/routes/types.ts b/src/plugins/files/server/routes/types.ts
index 1c803c71b78c06..58ddd8ca803c4f 100644
--- a/src/plugins/files/server/routes/types.ts
+++ b/src/plugins/files/server/routes/types.ts
@@ -41,6 +41,7 @@ export type FilesRequestHandler<
   Method extends RouteMethod = any
 > = RequestHandler<P, Q, B, FilesRequestHandlerContext, Method, KibanaResponseFactory>;
 
+// @ts-expect-error upgrade typescript v4.9.5
 export type AsyncResponse<T> = Promise<IKibanaResponse<T>>;
 
 export type CreateHandler<E extends AnyEndpoint> = FilesRequestHandler<
diff --git a/src/plugins/interactive_setup/public/use_form.ts b/src/plugins/interactive_setup/public/use_form.ts
index 47768400dd7755..bc3ae7caf360e7 100644
--- a/src/plugins/interactive_setup/public/use_form.ts
+++ b/src/plugins/interactive_setup/public/use_form.ts
@@ -128,7 +128,7 @@ export function useFormState<Values extends FormValues, Result>({
   const [touched, setTouched] = useState<TouchedFields<Values>>({});
   const [submitCount, setSubmitCount] = useState(0);
 
-  async function validateFormFn(formValues: Values): Promise<Result>;
+  async function validateFormFn(formValues: Values): Promise<DeepMap<Values, string>>;
   async function validateFormFn(formValues: undefined): Promise<undefined>;
   async function validateFormFn(formValues: Values | undefined) {
     // Allows resetting `useAsyncFn` state
diff --git a/src/plugins/presentation_util/public/services/create/provider.tsx b/src/plugins/presentation_util/public/services/create/provider.tsx
index 3271dc52fd9d08..c95231c6826d63 100644
--- a/src/plugins/presentation_util/public/services/create/provider.tsx
+++ b/src/plugins/presentation_util/public/services/create/provider.tsx
@@ -18,6 +18,7 @@ import { PluginServiceFactory } from './factory';
  */
 export type PluginServiceProviders<Services, StartParameters = {}> = {
   [K in keyof Services]: PluginServiceProvider<
+    // @ts-expect-error upgrade typescript v4.9.5
     Services[K],
     StartParameters,
     Services,
diff --git a/src/plugins/unified_histogram/public/layout/layout.tsx b/src/plugins/unified_histogram/public/layout/layout.tsx
index 7d1cb9f5e90647..aaeb67b15b1018 100644
--- a/src/plugins/unified_histogram/public/layout/layout.tsx
+++ b/src/plugins/unified_histogram/public/layout/layout.tsx
@@ -350,7 +350,8 @@ export const UnifiedHistogramLayout = ({
       </InPortal>
       <InPortal node={mainPanelNode}>
         {React.isValidElement(children)
-          ? React.cloneElement(children, { isChartAvailable })
+          ? // @ts-expect-error upgrade typescript v4.9.5
+            React.cloneElement(children, { isChartAvailable })
           : children}
       </InPortal>
       <ResizableLayout
diff --git a/src/plugins/vis_types/table/public/components/table_vis_basic.test.tsx b/src/plugins/vis_types/table/public/components/table_vis_basic.test.tsx
index b49f868e6e4af6..66d71693cdcbd4 100644
--- a/src/plugins/vis_types/table/public/components/table_vis_basic.test.tsx
+++ b/src/plugins/vis_types/table/public/components/table_vis_basic.test.tsx
@@ -13,6 +13,7 @@ import { FormattedColumn, TableVisConfig, TableVisUiState } from '../types';
 import { DatatableColumn } from '@kbn/expressions-plugin/common';
 import { createTableVisCell } from './table_vis_cell';
 import { createGridColumns } from './table_vis_columns';
+import { EuiDataGridProps } from '@elastic/eui';
 
 jest.mock('./table_vis_columns', () => ({
   createGridColumns: jest.fn(() => []),
@@ -107,7 +108,8 @@ describe('TableVisBasic', () => {
       undefined
     );
 
-    const { onSort } = comp.find('EuiDataGrid').prop('sorting');
+    const { onSort } = comp.find('EuiDataGrid').prop<EuiDataGridProps['sorting']>('sorting')!;
+
     // sort the first column
     onSort([{ id: 'first', direction: 'asc' }]);
     expect(uiStateProps.setSort).toHaveBeenCalledWith({ columnIndex: 0, direction: 'asc' });
diff --git a/src/plugins/vis_types/timeseries/public/convert_to_lens/lib/convert/percentile.ts b/src/plugins/vis_types/timeseries/public/convert_to_lens/lib/convert/percentile.ts
index 163d42b976b3a2..1cc36538798029 100644
--- a/src/plugins/vis_types/timeseries/public/convert_to_lens/lib/convert/percentile.ts
+++ b/src/plugins/vis_types/timeseries/public/convert_to_lens/lib/convert/percentile.ts
@@ -49,18 +49,20 @@ export const convertToPercentileColumn = (
     return null;
   }
   const commonColumnParams = createColumn(series, metric, field, { reducedTimeRange, timeShift });
+  const meta: PercentileColumn['meta'] =
+    index !== undefined
+      ? {
+          reference: `${metric.id}.${index}`,
+          ...commonColumnParams.meta,
+        }
+      : commonColumnParams.meta;
+
   return {
     operationType: 'percentile',
     sourceField: field.name,
     ...commonColumnParams,
     params: { ...params, ...getFormat(series) },
-    meta:
-      index !== undefined
-        ? {
-            reference: `${metric.id}.${index}`,
-            ...commonColumnParams.meta,
-          }
-        : commonColumnParams.meta,
+    meta,
   };
 };
 
diff --git a/src/plugins/vis_types/timeseries/public/convert_to_lens/lib/convert/percentile_rank.ts b/src/plugins/vis_types/timeseries/public/convert_to_lens/lib/convert/percentile_rank.ts
index 31374067be7c0b..27f9c021c56cae 100644
--- a/src/plugins/vis_types/timeseries/public/convert_to_lens/lib/convert/percentile_rank.ts
+++ b/src/plugins/vis_types/timeseries/public/convert_to_lens/lib/convert/percentile_rank.ts
@@ -19,6 +19,7 @@ import {
   Column,
   PercentileRanksColumnWithExtendedMeta,
   CommonColumnConverterArgs,
+  PercentileColumn,
 } from './types';
 
 export const isPercentileRanksColumnWithMeta = (
@@ -56,18 +57,19 @@ export const convertToPercentileRankColumn = (
   }
 
   const commonColumnParams = createColumn(series, metric, field, { reducedTimeRange, timeShift });
+  const meta: PercentileColumn['meta'] =
+    index !== undefined
+      ? {
+          reference: `${metric.id}.${index}`,
+          ...commonColumnParams.meta,
+        }
+      : commonColumnParams.meta;
   return {
     operationType: 'percentile_rank',
     sourceField: field.name,
     ...commonColumnParams,
     params: { ...params, ...getFormat(series) },
-    meta:
-      index !== undefined
-        ? {
-            reference: `${metric.id}.${index}`,
-            ...commonColumnParams.meta,
-          }
-        : commonColumnParams.meta,
+    meta,
   };
 };
 
diff --git a/src/plugins/visualizations/public/convert_to_lens/schemas.ts b/src/plugins/visualizations/public/convert_to_lens/schemas.ts
index 886be04bb654ac..cd0c3b25604671 100644
--- a/src/plugins/visualizations/public/convert_to_lens/schemas.ts
+++ b/src/plugins/visualizations/public/convert_to_lens/schemas.ts
@@ -8,7 +8,7 @@
 
 import type { DataView } from '@kbn/data-views-plugin/common';
 import { IAggConfig, METRIC_TYPES, TimefilterContract } from '@kbn/data-plugin/public';
-import { AggBasedColumn, PercentageModeConfig, SchemaConfig } from '../../common';
+import { AggBasedColumn, PercentageModeConfig, SchemaConfig, VisParams } from '../../common';
 import { convertMetricToColumns } from '../../common/convert_to_lens/lib/metrics';
 import {
   getAggIdAndValue,
@@ -133,8 +133,8 @@ const createLayer = (
   };
 };
 
-export const getColumnsFromVis = <T>(
-  vis: Vis<T>,
+export const getColumnsFromVis = <TVisParams extends VisParams>(
+  vis: Vis<TVisParams>,
   timefilter: TimefilterContract,
   dataView: DataView,
   {
diff --git a/src/plugins/visualizations/public/types.ts b/src/plugins/visualizations/public/types.ts
index f00777c5ef957d..29c8ca2e1b8268 100644
--- a/src/plugins/visualizations/public/types.ts
+++ b/src/plugins/visualizations/public/types.ts
@@ -80,7 +80,7 @@ export interface VisToExpressionAstParams {
   abortSignal?: AbortSignal;
 }
 
-export type VisToExpressionAst<TVisParams = VisParams> = (
+export type VisToExpressionAst<TVisParams extends VisParams = VisParams> = (
   vis: Vis<TVisParams>,
   params: VisToExpressionAstParams
 ) => Promise<ExpressionAstExpression> | ExpressionAstExpression;
diff --git a/src/plugins/visualizations/public/vis.ts b/src/plugins/visualizations/public/vis.ts
index d1dbe44d52945b..89e7282c4449e0 100644
--- a/src/plugins/visualizations/public/vis.ts
+++ b/src/plugins/visualizations/public/vis.ts
@@ -57,7 +57,7 @@ const getSearchSource = async (inputSearchSource: ISearchSource, savedSearchId?:
 
 type PartialVisState = Assign<SerializedVis, { data: Partial<SerializedVisData> }>;
 
-export class Vis<TVisParams = VisParams> {
+export class Vis<TVisParams extends VisParams = VisParams> {
   public readonly type: BaseVisType<TVisParams>;
   public readonly id?: string;
   public title: string = '';
diff --git a/src/plugins/visualizations/public/vis_async.ts b/src/plugins/visualizations/public/vis_async.ts
index 0996e5da48c367..4e295596b1611f 100644
--- a/src/plugins/visualizations/public/vis_async.ts
+++ b/src/plugins/visualizations/public/vis_async.ts
@@ -9,7 +9,7 @@
 import type { SerializedVis } from './vis';
 import type { VisParams } from '../common';
 
-export const createVisAsync = async <TVisParams = VisParams>(
+export const createVisAsync = async <TVisParams extends VisParams = VisParams>(
   visType: string,
   visState: SerializedVis<TVisParams> = {} as any
 ) => {
diff --git a/src/plugins/visualizations/public/vis_editors_registry.ts b/src/plugins/visualizations/public/vis_editors_registry.ts
index 627490f3f99bf5..d03f092d51baa3 100644
--- a/src/plugins/visualizations/public/vis_editors_registry.ts
+++ b/src/plugins/visualizations/public/vis_editors_registry.ts
@@ -6,6 +6,7 @@
  * Side Public License, v 1.
  */
 
+import { VisParams } from '../common';
 import { VisEditorConstructor } from './visualize_app/types';
 
 const DEFAULT_NAME = 'default';
@@ -17,7 +18,10 @@ export const createVisEditorsRegistry = () => {
     registerDefault: (editor: VisEditorConstructor) => {
       map.set(DEFAULT_NAME, editor);
     },
-    register: <TVisParams>(name: string, editor: VisEditorConstructor<TVisParams>) => {
+    register: <TVisParams extends VisParams>(
+      name: string,
+      editor: VisEditorConstructor<TVisParams>
+    ) => {
       if (name) {
         map.set(name, editor);
       }
diff --git a/src/plugins/visualizations/public/vis_schemas.ts b/src/plugins/visualizations/public/vis_schemas.ts
index cd8bd9bc386a86..72cee5a3ce06be 100644
--- a/src/plugins/visualizations/public/vis_schemas.ts
+++ b/src/plugins/visualizations/public/vis_schemas.ts
@@ -14,7 +14,7 @@ import {
 } from '@kbn/data-plugin/common';
 import { search } from '@kbn/data-plugin/public';
 import { Vis, VisToExpressionAstParams } from './types';
-import { SchemaConfig } from '../common/types';
+import { SchemaConfig, VisParams } from '../common/types';
 import { convertToSchemaConfig } from '../common';
 
 const { isDateHistogramBucketAggConfig } = search.aggs;
@@ -76,7 +76,7 @@ const createSchemaConfig = (
   return { ...convertToSchemaConfig(updatedAgg), accessor };
 };
 
-export const getVisSchemas = <TVisParams>(
+export const getVisSchemas = <TVisParams extends VisParams>(
   vis: Vis<TVisParams>,
   params: VisToExpressionAstParams
 ): Schemas => {
diff --git a/src/plugins/visualizations/public/vis_types/base_vis_type.ts b/src/plugins/visualizations/public/vis_types/base_vis_type.ts
index 2625781c264296..26801421159b31 100644
--- a/src/plugins/visualizations/public/vis_types/base_vis_type.ts
+++ b/src/plugins/visualizations/public/vis_types/base_vis_type.ts
@@ -21,7 +21,7 @@ const defaultOptions: VisTypeOptions = {
   hierarchicalData: false, // we should get rid of this i guess ?
 };
 
-export class BaseVisType<TVisParams = VisParams> {
+export class BaseVisType<TVisParams extends VisParams = VisParams> {
   public readonly name;
   public readonly title;
   public readonly description;
diff --git a/src/plugins/visualizations/public/vis_types/types.ts b/src/plugins/visualizations/public/vis_types/types.ts
index 90f64276adf763..2f689cb81aee02 100644
--- a/src/plugins/visualizations/public/vis_types/types.ts
+++ b/src/plugins/visualizations/public/vis_types/types.ts
@@ -79,7 +79,7 @@ interface CustomEditorConfig {
  * A visualization type definition representing a spec of one specific type of "classical"
  * visualizations (i.e. not Lens visualizations).
  */
-export interface VisTypeDefinition<TVisParams> {
+export interface VisTypeDefinition<TVisParams extends VisParams> {
   /**
    * Visualization unique name
    */
diff --git a/src/plugins/visualizations/public/vis_types/types_service.ts b/src/plugins/visualizations/public/vis_types/types_service.ts
index 4b20dcc1569c5e..282c9b65bfe941 100644
--- a/src/plugins/visualizations/public/vis_types/types_service.ts
+++ b/src/plugins/visualizations/public/vis_types/types_service.ts
@@ -10,6 +10,7 @@ import { visTypeAliasRegistry, VisTypeAlias } from './vis_type_alias_registry';
 import { BaseVisType } from './base_vis_type';
 import { VisTypeDefinition } from './types';
 import { VisGroups } from './vis_groups_enum';
+import { VisParams } from '../../common';
 
 /**
  * Vis Types Service
@@ -19,7 +20,9 @@ import { VisGroups } from './vis_groups_enum';
 export class TypesService {
   private types: Record<string, BaseVisType<any>> = {};
 
-  private registerVisualization<TVisParam>(visDefinition: BaseVisType<TVisParam>) {
+  private registerVisualization<TVisParam extends VisParams>(
+    visDefinition: BaseVisType<TVisParam>
+  ) {
     if (this.types[visDefinition.name]) {
       throw new Error('type already exists!');
     }
@@ -32,7 +35,9 @@ export class TypesService {
        * registers a visualization type
        * @param config - visualization type definition
        */
-      createBaseVisualization: <TVisParams>(config: VisTypeDefinition<TVisParams>): void => {
+      createBaseVisualization: <TVisParams extends VisParams>(
+        config: VisTypeDefinition<TVisParams>
+      ): void => {
         const vis = new BaseVisType(config);
         this.registerVisualization(vis);
       },
@@ -51,7 +56,9 @@ export class TypesService {
        * returns specific visualization or undefined if not found
        * @param {string} visualization - id of visualization to return
        */
-      get: <TVisParams>(visualization: string): BaseVisType<TVisParams> | undefined => {
+      get: <TVisParams extends VisParams>(
+        visualization: string
+      ): BaseVisType<TVisParams> | undefined => {
         return this.types[visualization];
       },
       /**
diff --git a/src/plugins/visualizations/public/visualize_app/types.ts b/src/plugins/visualizations/public/visualize_app/types.ts
index abc55e3e671fec..7e91cd4ce2bd01 100644
--- a/src/plugins/visualizations/public/visualize_app/types.ts
+++ b/src/plugins/visualizations/public/visualize_app/types.ts
@@ -137,7 +137,7 @@ export type SavedVisInstance = VisInstance;
 export type ByValueVisInstance = VisInstance;
 export type VisualizeEditorVisInstance = SavedVisInstance | ByValueVisInstance;
 
-export type VisEditorConstructor<TVisParams = VisParams> = new (
+export type VisEditorConstructor<TVisParams extends VisParams = VisParams> = new (
   element: HTMLElement,
   vis: Vis<TVisParams>,
   eventEmitter: EventEmitter,
diff --git a/src/plugins/visualizations/public/wizard/agg_based_selection/agg_based_selection.test.tsx b/src/plugins/visualizations/public/wizard/agg_based_selection/agg_based_selection.test.tsx
index 208eefe941528c..46100397e26653 100644
--- a/src/plugins/visualizations/public/wizard/agg_based_selection/agg_based_selection.test.tsx
+++ b/src/plugins/visualizations/public/wizard/agg_based_selection/agg_based_selection.test.tsx
@@ -10,6 +10,7 @@ import React from 'react';
 import { mountWithIntl } from '@kbn/test-jest-helpers';
 import { TypesStart, BaseVisType, VisGroups } from '../../vis_types';
 import { AggBasedSelection } from './agg_based_selection';
+import { VisParams } from '../../../common';
 
 describe('AggBasedSelection', () => {
   const defaultVisTypeParams = {
@@ -47,7 +48,7 @@ describe('AggBasedSelection', () => {
   ] as BaseVisType[];
 
   const visTypes: TypesStart = {
-    get<T>(id: string): BaseVisType<T> {
+    get<T extends VisParams>(id: string): BaseVisType<T> {
       return _visTypes.find((vis) => vis.name === id) as unknown as BaseVisType<T>;
     },
     all: () => _visTypes,
diff --git a/src/plugins/visualizations/public/wizard/group_selection/group_selection.test.tsx b/src/plugins/visualizations/public/wizard/group_selection/group_selection.test.tsx
index a9a21446e06a20..33955b6f2995f2 100644
--- a/src/plugins/visualizations/public/wizard/group_selection/group_selection.test.tsx
+++ b/src/plugins/visualizations/public/wizard/group_selection/group_selection.test.tsx
@@ -11,6 +11,7 @@ import { mountWithIntl } from '@kbn/test-jest-helpers';
 import { TypesStart, BaseVisType, VisGroups } from '../../vis_types';
 import { GroupSelection } from './group_selection';
 import { DocLinksStart } from '@kbn/core/public';
+import { VisParams } from '../../../common';
 
 describe('GroupSelection', () => {
   const defaultVisTypeParams = {
@@ -61,7 +62,7 @@ describe('GroupSelection', () => {
 
   const visTypesRegistry = (visTypes: BaseVisType[]): TypesStart => {
     return {
-      get<T>(id: string): BaseVisType<T> {
+      get<T extends VisParams>(id: string): BaseVisType<T> {
         return visTypes.find((vis) => vis.name === id) as unknown as BaseVisType<T>;
       },
       all: () => {
diff --git a/src/plugins/visualizations/public/wizard/new_vis_modal.test.tsx b/src/plugins/visualizations/public/wizard/new_vis_modal.test.tsx
index 0db5f66cc5c925..c2f9aed1ec0cca 100644
--- a/src/plugins/visualizations/public/wizard/new_vis_modal.test.tsx
+++ b/src/plugins/visualizations/public/wizard/new_vis_modal.test.tsx
@@ -13,6 +13,7 @@ import NewVisModal from './new_vis_modal';
 import { ApplicationStart, DocLinksStart } from '@kbn/core/public';
 import { embeddablePluginMock } from '@kbn/embeddable-plugin/public/mocks';
 import { contentManagementMock } from '@kbn/content-management-plugin/public/mocks';
+import { VisParams } from '../../common';
 
 describe('NewVisModal', () => {
   const defaultVisTypeParams = {
@@ -61,7 +62,7 @@ describe('NewVisModal', () => {
     },
   ] as BaseVisType[];
   const visTypes: TypesStart = {
-    get<T>(id: string): BaseVisType<T> {
+    get<T extends VisParams>(id: string): BaseVisType<T> {
       return _visTypes.find((vis) => vis.name === id) as unknown as BaseVisType<T>;
     },
     all: () => _visTypes,
diff --git a/test/plugin_functional/test_suites/core_plugins/rendering.ts b/test/plugin_functional/test_suites/core_plugins/rendering.ts
index 72b64f7b0aa454..b68ff285076e3f 100644
--- a/test/plugin_functional/test_suites/core_plugins/rendering.ts
+++ b/test/plugin_functional/test_suites/core_plugins/rendering.ts
@@ -39,6 +39,7 @@ export default function ({ getService }: PluginFunctionalProviderContext) {
     await appsMenu.clickLink(title);
     return browser.execute(() => {
       if (!('__RENDERING_SESSION__' in window)) {
+        // @ts-expect-error upgrade typescript v4.9.5
         window.__RENDERING_SESSION__ = [];
       }
 
diff --git a/x-pack/packages/ml/cancellable_search/src/use_cancellable_search.ts b/x-pack/packages/ml/cancellable_search/src/use_cancellable_search.ts
index 78e7e4a17b1fae..4f0d75fdede247 100644
--- a/x-pack/packages/ml/cancellable_search/src/use_cancellable_search.ts
+++ b/x-pack/packages/ml/cancellable_search/src/use_cancellable_search.ts
@@ -31,6 +31,7 @@ export function useCancellableSearch(data: DataPublicPluginStart) {
     ): Promise<ResponseType | null> => {
       return new Promise((resolve, reject) => {
         data.search
+          // @ts-expect-error upgrade typescript v4.9.5
           .search<RequestBody, ResponseType>(requestBody, {
             abortSignal: abortController.current.signal,
             ...options,
diff --git a/x-pack/packages/ml/date_picker/src/components/full_time_range_selector.test.tsx b/x-pack/packages/ml/date_picker/src/components/full_time_range_selector.test.tsx
index 9307a24d88359a..a217bbc4fb2cf0 100644
--- a/x-pack/packages/ml/date_picker/src/components/full_time_range_selector.test.tsx
+++ b/x-pack/packages/ml/date_picker/src/components/full_time_range_selector.test.tsx
@@ -70,6 +70,7 @@ describe('FullTimeRangeSelector', () => {
     const { getByText } = render(
       <IntlProvider locale="en">
         <DatePickerContextProvider {...mockDependencies}>
+          {/* @ts-expect-error upgrade typescript v4.9.5*/}
           <FullTimeRangeSelector {...props} />
         </DatePickerContextProvider>
       </IntlProvider>
@@ -98,6 +99,7 @@ describe('FullTimeRangeSelector', () => {
     const { getByText } = render(
       <IntlProvider locale="en">
         <DatePickerContextProvider {...mockDependencies}>
+          {/* @ts-expect-error upgrade typescript v4.9.5*/}
           <FullTimeRangeSelector {...props} />
         </DatePickerContextProvider>
       </IntlProvider>
diff --git a/x-pack/plugins/aiops/public/hooks/use_cancellable_search.ts b/x-pack/plugins/aiops/public/hooks/use_cancellable_search.ts
index 7d905fe2894eae..8a828f388c2f23 100644
--- a/x-pack/plugins/aiops/public/hooks/use_cancellable_search.ts
+++ b/x-pack/plugins/aiops/public/hooks/use_cancellable_search.ts
@@ -21,6 +21,7 @@ export function useCancellableSearch() {
     ): Promise<ResponseType | null> => {
       return new Promise((resolve, reject) => {
         data.search
+          // @ts-expect-error upgrade typescript v4.9.5
           .search<RequestBody, ResponseType>(requestBody, {
             abortSignal: abortController.current.signal,
           })
diff --git a/x-pack/plugins/alerting/server/application/rule/methods/create/create_rule.ts b/x-pack/plugins/alerting/server/application/rule/methods/create/create_rule.ts
index 11cd4d5f9e3284..b9e4dedf4d1330 100644
--- a/x-pack/plugins/alerting/server/application/rule/methods/create/create_rule.ts
+++ b/x-pack/plugins/alerting/server/application/rule/methods/create/create_rule.ts
@@ -195,6 +195,7 @@ export async function createRule<Params extends RuleParams = never>(
     {
       legacyId,
       actionsWithRefs: actions,
+      // @ts-expect-error upgrade typescript v4.9.5
       paramsWithRefs: updatedParams,
     }
   );
diff --git a/x-pack/plugins/alerting/server/application/rule/methods/resolve/types/resolved_rule.ts b/x-pack/plugins/alerting/server/application/rule/methods/resolve/types/resolved_rule.ts
index d9d0c3f0c5e8f9..a5aef7d2aaf4db 100644
--- a/x-pack/plugins/alerting/server/application/rule/methods/resolve/types/resolved_rule.ts
+++ b/x-pack/plugins/alerting/server/application/rule/methods/resolve/types/resolved_rule.ts
@@ -6,4 +6,5 @@
  */
 import type { Rule } from '../../../types';
 
+// @ts-expect-error upgrade typescript v4.9.5
 export type ResolvedRule<Params> = Rule<Params> & { outcome: string; alias_target_id?: string };
diff --git a/x-pack/plugins/alerting/server/routes/get_rule.test.ts b/x-pack/plugins/alerting/server/routes/get_rule.test.ts
index a672de9cbf320d..864a848b8ffa8d 100644
--- a/x-pack/plugins/alerting/server/routes/get_rule.test.ts
+++ b/x-pack/plugins/alerting/server/routes/get_rule.test.ts
@@ -48,6 +48,7 @@ describe('getRuleRoute', () => {
         alertsFilter: {
           query: {
             kql: 'name:test',
+            // @ts-expect-error upgrade typescript v4.9.5
             dsl: '{"must": {"term": { "name": "test" }}}',
             filters: [],
           },
diff --git a/x-pack/plugins/alerting/server/routes/lib/rewrite_rule.test.ts b/x-pack/plugins/alerting/server/routes/lib/rewrite_rule.test.ts
index 826ee952a6bb65..4ad0dc817fbbe4 100644
--- a/x-pack/plugins/alerting/server/routes/lib/rewrite_rule.test.ts
+++ b/x-pack/plugins/alerting/server/routes/lib/rewrite_rule.test.ts
@@ -43,6 +43,7 @@ const sampleRule: SanitizedRule<RuleTypeParams> & { activeSnoozes?: string[] } =
         notifyWhen: 'onThrottleInterval',
         throttle: '1m',
       },
+      // @ts-expect-error upgrade typescript v4.9.5
       alertsFilter: { query: { kql: 'test:1', dsl: '{}', filters: [] } },
     },
   ],
diff --git a/x-pack/plugins/alerting/server/routes/rule/apis/create/create_rule_route.test.ts b/x-pack/plugins/alerting/server/routes/rule/apis/create/create_rule_route.test.ts
index e952a72ec38590..512436475a3951 100644
--- a/x-pack/plugins/alerting/server/routes/rule/apis/create/create_rule_route.test.ts
+++ b/x-pack/plugins/alerting/server/routes/rule/apis/create/create_rule_route.test.ts
@@ -55,6 +55,7 @@ describe('createRuleRoute', () => {
         alertsFilter: {
           query: {
             kql: 'name:test',
+            // @ts-expect-error upgrade typescript v4.9.5
             dsl: '{"must": {"term": { "name": "test" }}}',
             filters: [],
           },
diff --git a/x-pack/plugins/canvas/canvas_plugin_src/functions/server/pointseries/index.ts b/x-pack/plugins/canvas/canvas_plugin_src/functions/server/pointseries/index.ts
index 195de0a38a5818..957dd1bf3782e0 100644
--- a/x-pack/plugins/canvas/canvas_plugin_src/functions/server/pointseries/index.ts
+++ b/x-pack/plugins/canvas/canvas_plugin_src/functions/server/pointseries/index.ts
@@ -28,7 +28,7 @@ const columnExists = (cols: string[], colName: string): boolean =>
   cols.includes(unquoteString(colName));
 
 function keysOf<T, K extends keyof T>(obj: T): K[] {
-  return Object.keys(obj) as K[];
+  return Object.keys(obj as any) as K[];
 }
 
 type Arguments = { [key in PointSeriesColumnName]: string | null };
diff --git a/x-pack/plugins/canvas/server/templates/status_report.ts b/x-pack/plugins/canvas/server/templates/status_report.ts
index 94f05c371ff98a..2cfa1be75bfec7 100644
--- a/x-pack/plugins/canvas/server/templates/status_report.ts
+++ b/x-pack/plugins/canvas/server/templates/status_report.ts
@@ -652,6 +652,7 @@ export const status: CanvasTemplate = {
             },
             expression:
               'demodata\n| dropdownControl valueColumn="project" filterColumn="project"\n| render',
+            // @ts-expect-error upgrade typescript v4.9.5
             filter: '',
           },
         ],
diff --git a/x-pack/plugins/canvas/server/templates/summary_report.ts b/x-pack/plugins/canvas/server/templates/summary_report.ts
index 67cbe0bf6a1e84..3bba179d35efd3 100644
--- a/x-pack/plugins/canvas/server/templates/summary_report.ts
+++ b/x-pack/plugins/canvas/server/templates/summary_report.ts
@@ -324,6 +324,7 @@ export const summary: CanvasTemplate = {
             },
             expression:
               'timefilterControl compact=true column="@timestamp"\n| render css=".canvasTimePickerPopover__button {\n border: none !important;\n}"',
+            // @ts-expect-error upgrade typescript v4.9.5
             filter: 'timefilter from="now-14d" to=now column=@timestamp',
           },
           {
diff --git a/x-pack/plugins/canvas/types/arguments.ts b/x-pack/plugins/canvas/types/arguments.ts
index 0ecc696165919c..4269c62d352ba9 100644
--- a/x-pack/plugins/canvas/types/arguments.ts
+++ b/x-pack/plugins/canvas/types/arguments.ts
@@ -38,6 +38,7 @@ export interface ArgumentSpec<ArgumentConfig = {}> {
     domNode: HTMLElement,
     config: ArgumentConfig,
     handlers: ArgumentHandlers,
+    // @ts-expect-error upgrade typescript v4.9.5
     onMount: (ref: UpdatePropsRef<ArgumentConfig> | null) => void
   ) => void;
   /**
@@ -48,6 +49,7 @@ export interface ArgumentSpec<ArgumentConfig = {}> {
     domNode: HTMLElement,
     config: ArgumentConfig,
     handlers: ArgumentHandlers,
+    // @ts-expect-error upgrade typescript v4.9.5
     onMount: (ref: UpdatePropsRef<ArgumentConfig> | null) => void
   ) => void;
 }
diff --git a/x-pack/plugins/canvas/types/functions.ts b/x-pack/plugins/canvas/types/functions.ts
index 5dd57c00cc4990..4c07add1e051e9 100644
--- a/x-pack/plugins/canvas/types/functions.ts
+++ b/x-pack/plugins/canvas/types/functions.ts
@@ -72,6 +72,7 @@ import type { initFunctions as initClientFunctions } from '../public/functions';
  */
 // prettier-ignore
 export type ExpressionFunctionFactory<Name extends string, Input, Arguments, Output> =
+  // @ts-expect-error upgrade typescript v4.9.5
   () => ExpressionFunctionDefinition<Name, Input, Arguments, Output>
 
 /**
@@ -83,6 +84,7 @@ export type ExpressionFunctionFactory<Name extends string, Input, Arguments, Out
 // prettier-ignore
 export type FunctionFactory<FnFactory> =
   FnFactory extends ExpressionFunctionFactory<infer Name, infer Input, infer Arguments, infer Output> ?
+    // @ts-expect-error upgrade typescript v4.9.5
     ExpressionFunctionDefinition<Name, Input, Arguments, Awaited<Output>> :
     never;
 
diff --git a/x-pack/plugins/cases/public/api/utils.ts b/x-pack/plugins/cases/public/api/utils.ts
index 6bb1c23266d651..99e6ceb6f312c0 100644
--- a/x-pack/plugins/cases/public/api/utils.ts
+++ b/x-pack/plugins/cases/public/api/utils.ts
@@ -39,7 +39,7 @@ export const convertArrayToCamelCase = (arrayOfSnakes: unknown[]): unknown[] =>
   }, []);
 
 export const convertToCamelCase = <T, U extends {}>(obj: T): U =>
-  Object.entries(obj).reduce((acc, [key, value]) => {
+  Object.entries(obj as never).reduce((acc, [key, value]) => {
     if (isArray(value)) {
       set(acc, camelCase(key), convertArrayToCamelCase(value));
     } else if (isObject(value)) {
diff --git a/x-pack/plugins/cases/public/components/case_view/components/user_list.test.tsx b/x-pack/plugins/cases/public/components/case_view/components/user_list.test.tsx
index bcfb70cc2fe8ca..3da3cd8add20d5 100644
--- a/x-pack/plugins/cases/public/components/case_view/components/user_list.test.tsx
+++ b/x-pack/plugins/cases/public/components/case_view/components/user_list.test.tsx
@@ -147,6 +147,7 @@ describe('UserList ', () => {
               username: null,
               email: null,
               full_name: null,
+              // @ts-expect-error upgrade typescript v4.9.5
               uid: null,
             },
           },
diff --git a/x-pack/plugins/data_visualizer/public/application/data_drift/use_data_drift_result.ts b/x-pack/plugins/data_visualizer/public/application/data_drift/use_data_drift_result.ts
index 05f24bdcb7b683..d1873df4d66716 100644
--- a/x-pack/plugins/data_visualizer/public/application/data_drift/use_data_drift_result.ts
+++ b/x-pack/plugins/data_visualizer/public/application/data_drift/use_data_drift_result.ts
@@ -509,7 +509,9 @@ const fetchComparisonDriftedData = async ({
   );
 
   fieldsWithNoOverlap.forEach((field) => {
+    // @ts-expect-error upgrade typescript v4.9.5
     if (driftedResp.aggregations) {
+      // @ts-expect-error upgrade typescript v4.9.5
       driftedResp.aggregations[`${field}_ks_test`] = {
         // Setting -Infinity to represent astronomically small number
         // which would be represented as < 0.000001 in table
@@ -801,6 +803,7 @@ export const useFetchDataComparisonResult = (
             randomSamplerWrapper,
 
             asyncFetchFn: (chunkedFields) =>
+              // @ts-expect-error upgrade typescript v4.9.5
               fetchReferenceBaselineData({
                 dataSearch,
                 baseRequest: baselineRequest,
@@ -862,6 +865,7 @@ export const useFetchDataComparisonResult = (
             fields,
             randomSamplerWrapper: prodRandomSamplerWrapper,
 
+            // @ts-expect-error upgrade typescript v4.9.5
             asyncFetchFn: (chunkedFields: DataDriftField[]) =>
               fetchComparisonDriftedData({
                 dataSearch,
@@ -904,11 +908,14 @@ export const useFetchDataComparisonResult = (
             fields,
             randomSamplerWrapper,
 
+            // @ts-expect-error upgrade typescript v4.9.5
             asyncFetchFn: (chunkedFields: DataDriftField[]) =>
               fetchHistogramData({
                 dataSearch,
                 baseRequest: referenceHistogramRequest,
+                // @ts-expect-error upgrade typescript v4.9.5
                 baselineResponseAggs,
+                // @ts-expect-error upgrade typescript v4.9.5
                 driftedRespAggs,
                 fields: chunkedFields,
                 randomSamplerWrapper,
@@ -946,11 +953,14 @@ export const useFetchDataComparisonResult = (
             fields,
             randomSamplerWrapper,
 
+            // @ts-expect-error upgrade typescript v4.9.5
             asyncFetchFn: (chunkedFields: DataDriftField[]) =>
               fetchHistogramData({
                 dataSearch,
                 baseRequest: comparisonHistogramRequest,
+                // @ts-expect-error upgrade typescript v4.9.5
                 baselineResponseAggs,
+                // @ts-expect-error upgrade typescript v4.9.5
                 driftedRespAggs,
                 fields: chunkedFields,
                 randomSamplerWrapper,
@@ -972,30 +982,42 @@ export const useFetchDataComparisonResult = (
           for (const { field, type, secondaryType } of fields) {
             if (
               type === DATA_COMPARISON_TYPE.NUMERIC &&
+              // @ts-expect-error upgrade typescript v4.9.5
               driftedRespAggs[`${field}_ks_test`] &&
+              // @ts-expect-error upgrade typescript v4.9.5
               referenceHistogramRespAggs[`${field}_histogram`] &&
+              // @ts-expect-error upgrade typescript v4.9.5
               comparisonHistogramRespAggs[`${field}_histogram`]
             ) {
               data[field] = {
                 secondaryType,
                 type: DATA_COMPARISON_TYPE.NUMERIC,
+                // @ts-expect-error upgrade typescript v4.9.5
                 pValue: driftedRespAggs[`${field}_ks_test`].two_sided,
+                // @ts-expect-error upgrade typescript v4.9.5
                 referenceHistogram: referenceHistogramRespAggs[`${field}_histogram`].buckets,
+                // @ts-expect-error upgrade typescript v4.9.5
                 comparisonHistogram: comparisonHistogramRespAggs[`${field}_histogram`].buckets,
               };
             }
             if (
               type === DATA_COMPARISON_TYPE.CATEGORICAL &&
+              // @ts-expect-error upgrade typescript v4.9.5
               driftedRespAggs[`${field}_terms`] &&
+              // @ts-expect-error upgrade typescript v4.9.5
               baselineResponseAggs[`${field}_terms`]
             ) {
               data[field] = {
                 secondaryType,
                 type: DATA_COMPARISON_TYPE.CATEGORICAL,
+                // @ts-expect-error upgrade typescript v4.9.5
                 driftedTerms: driftedRespAggs[`${field}_terms`].buckets ?? [],
+                // @ts-expect-error upgrade typescript v4.9.5
                 driftedSumOtherDocCount: driftedRespAggs[`${field}_terms`].sum_other_doc_count,
+                // @ts-expect-error upgrade typescript v4.9.5
                 baselineTerms: baselineResponseAggs[`${field}_terms`].buckets ?? [],
                 baselineSumOtherDocCount:
+                  // @ts-expect-error upgrade typescript v4.9.5
                   baselineResponseAggs[`${field}_terms`].sum_other_doc_count,
               };
             }
diff --git a/x-pack/plugins/ecs_data_quality_dashboard/server/lib/build_response/index.ts b/x-pack/plugins/ecs_data_quality_dashboard/server/lib/build_response/index.ts
index bbec702c74915b..343601f1c33669 100644
--- a/x-pack/plugins/ecs_data_quality_dashboard/server/lib/build_response/index.ts
+++ b/x-pack/plugins/ecs_data_quality_dashboard/server/lib/build_response/index.ts
@@ -41,10 +41,13 @@ export class ResponseFactory {
   constructor(private response: KibanaResponseFactory) {}
 
   /** error */
+  // @ts-expect-error upgrade typescript v4.9.5
   error<T>({ statusCode, body, headers }: CustomHttpResponseOptions<T>) {
+    // @ts-expect-error upgrade typescript v4.9.5
     const contentType: CustomHttpResponseOptions<T>['headers'] = {
       'content-type': 'application/json',
     };
+    // @ts-expect-error upgrade typescript v4.9.5
     const defaultedHeaders: CustomHttpResponseOptions<T>['headers'] = {
       ...contentType,
       ...(headers ?? {}),
diff --git a/x-pack/plugins/elastic_assistant/server/lib/build_response/index.ts b/x-pack/plugins/elastic_assistant/server/lib/build_response/index.ts
index bbec702c74915b..343601f1c33669 100644
--- a/x-pack/plugins/elastic_assistant/server/lib/build_response/index.ts
+++ b/x-pack/plugins/elastic_assistant/server/lib/build_response/index.ts
@@ -41,10 +41,13 @@ export class ResponseFactory {
   constructor(private response: KibanaResponseFactory) {}
 
   /** error */
+  // @ts-expect-error upgrade typescript v4.9.5
   error<T>({ statusCode, body, headers }: CustomHttpResponseOptions<T>) {
+    // @ts-expect-error upgrade typescript v4.9.5
     const contentType: CustomHttpResponseOptions<T>['headers'] = {
       'content-type': 'application/json',
     };
+    // @ts-expect-error upgrade typescript v4.9.5
     const defaultedHeaders: CustomHttpResponseOptions<T>['headers'] = {
       ...contentType,
       ...(headers ?? {}),
diff --git a/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/connector_total_stats.tsx b/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/connector_total_stats.tsx
index fc3fde9dea5493..2fceb211c86c42 100644
--- a/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/connector_total_stats.tsx
+++ b/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/connector_total_stats.tsx
@@ -38,6 +38,7 @@ export const ConnectorTotalStats: React.FC = () => {
 
   const stats: EuiStatProps[] & { 'data-test-subj'?: string } = [
     {
+      // @ts-expect-error upgrade typescript v4.9.5
       'data-test-subj': 'entSearchContent-indexOverview-totalStats-ingestionType',
       description: i18n.translate(
         'xpack.enterpriseSearch.content.searchIndex.totalStats.ingestionTypeCardLabel',
@@ -54,6 +55,7 @@ export const ConnectorTotalStats: React.FC = () => {
       ),
     },
     {
+      // @ts-expect-error upgrade typescript v4.9.5
       'data-test-subj': 'entSearchContent-indexOverview-totalStats-connectorType',
       description: i18n.translate('xpack.enterpriseSearch.connector.connectorTypePanel.title', {
         defaultMessage: 'Connector type',
diff --git a/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/crawler_total_stats.tsx b/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/crawler_total_stats.tsx
index f5a72ac475fd9c..9dec32c1415d2c 100644
--- a/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/crawler_total_stats.tsx
+++ b/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/crawler_total_stats.tsx
@@ -31,6 +31,7 @@ export const CrawlerTotalStats: React.FC = () => {
 
   const stats: EuiStatProps[] & { 'data-test-subj'?: string } = [
     {
+      // @ts-expect-error upgrade typescript v4.9.5
       'data-test-subj': 'entSearchContent-indexOverview-totalStats-ingestionType',
       description: i18n.translate(
         'xpack.enterpriseSearch.content.searchIndex.totalStats.ingestionTypeCardLabel',
@@ -57,6 +58,7 @@ export const CrawlerTotalStats: React.FC = () => {
       title: domains.length,
     },
     {
+      // @ts-expect-error upgrade typescript v4.9.5
       'data-test-subj': 'entSearchContent-indexOverview-totalStats-documentCount',
       description: i18n.translate(
         'xpack.enterpriseSearch.content.searchIndex.totalStats.documentCountCardLabel',
diff --git a/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/pipelines/pipelines_json_configurations_logic.ts b/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/pipelines/pipelines_json_configurations_logic.ts
index d450dff591f6ca..d81cae698db984 100644
--- a/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/pipelines/pipelines_json_configurations_logic.ts
+++ b/x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_index/pipelines/pipelines_json_configurations_logic.ts
@@ -52,6 +52,7 @@ export const IndexPipelinesConfigurationsLogic = kea<
   },
   events: ({ actions, values }) => ({
     afterMount: () => {
+      // @ts-expect-error upgrade typescript v4.9.5
       if (!values.indexPipelinesData || values.indexPipelinesData.length === 0) {
         return;
       }
diff --git a/x-pack/plugins/enterprise_search/public/applications/shared/accordion_list/accordion_list.test.tsx b/x-pack/plugins/enterprise_search/public/applications/shared/accordion_list/accordion_list.test.tsx
index 13fe9c8f0efd92..cbed21624bdb83 100644
--- a/x-pack/plugins/enterprise_search/public/applications/shared/accordion_list/accordion_list.test.tsx
+++ b/x-pack/plugins/enterprise_search/public/applications/shared/accordion_list/accordion_list.test.tsx
@@ -29,6 +29,7 @@ describe('AccordionList', () => {
   it('renders as an accordion with the passed in title and icon', () => {
     expect(wrapper.is(EuiAccordion)).toBe(true);
 
+    // @ts-expect-error upgrade typescript v4.9.5
     const buttonContent = shallow(wrapper.prop('buttonContent'));
 
     expect(buttonContent.find(EuiIcon).prop('type')).toEqual('globe');
@@ -36,6 +37,7 @@ describe('AccordionList', () => {
   });
 
   it('shows the item count', () => {
+    // @ts-expect-error upgrade typescript v4.9.5
     const extraActionContent = shallow(wrapper.prop('extraAction'));
 
     expect(extraActionContent.text()).toEqual('2');
diff --git a/x-pack/plugins/fleet/.storybook/context/fixtures/integration.nginx.ts b/x-pack/plugins/fleet/.storybook/context/fixtures/integration.nginx.ts
index 8f47d564c44a2c..37ac4fa8119471 100644
--- a/x-pack/plugins/fleet/.storybook/context/fixtures/integration.nginx.ts
+++ b/x-pack/plugins/fleet/.storybook/context/fixtures/integration.nginx.ts
@@ -19,6 +19,7 @@ export const item: GetInfoResponse['item'] = {
   icons: [
     {
       src: '/img/logo_nginx.svg',
+      // @ts-expect-error upgrade typescript v4.9.5
       path: '/package/nginx/0.7.0/img/logo_nginx.svg',
       title: 'logo nginx',
       size: '32x32',
diff --git a/x-pack/plugins/fleet/common/authz.test.ts b/x-pack/plugins/fleet/common/authz.test.ts
index c7686083a6bed3..28a01e72992b62 100644
--- a/x-pack/plugins/fleet/common/authz.test.ts
+++ b/x-pack/plugins/fleet/common/authz.test.ts
@@ -21,7 +21,7 @@ import { ENDPOINT_PRIVILEGES } from './constants';
 const SECURITY_SOLUTION_ID = DEFAULT_APP_CATEGORIES.security.id;
 
 function generateActions<T>(privileges: T, overrides: Record<string, boolean> = {}) {
-  return Object.keys(privileges).reduce((acc, privilege) => {
+  return Object.keys(privileges as any).reduce((acc, privilege) => {
     const executePackageAction = overrides[privilege] || false;
 
     return {
diff --git a/x-pack/plugins/fleet/public/applications/fleet/sections/settings/hooks/use_confirm_modal.tsx b/x-pack/plugins/fleet/public/applications/fleet/sections/settings/hooks/use_confirm_modal.tsx
index aa284ed64f2c97..a3b3b5f9bbf7df 100644
--- a/x-pack/plugins/fleet/public/applications/fleet/sections/settings/hooks/use_confirm_modal.tsx
+++ b/x-pack/plugins/fleet/public/applications/fleet/sections/settings/hooks/use_confirm_modal.tsx
@@ -56,6 +56,7 @@ export function useConfirmModal() {
 export function withConfirmModalProvider<T>(WrappedComponent: React.FunctionComponent<T>) {
   return (props: T) => (
     <ConfirmModalProvider>
+      {/* @ts-expect-error upgrade typescript v4.9.5*/}
       <WrappedComponent {...props} />
     </ConfirmModalProvider>
   );
diff --git a/x-pack/plugins/fleet/server/services/preconfiguration.ts b/x-pack/plugins/fleet/server/services/preconfiguration.ts
index 8a4944ddb99ad4..a6c05bf969ff25 100644
--- a/x-pack/plugins/fleet/server/services/preconfiguration.ts
+++ b/x-pack/plugins/fleet/server/services/preconfiguration.ts
@@ -305,6 +305,7 @@ export async function ensurePreconfiguredPackagesAndPolicies(
             }),
           }
     ),
+    // @ts-expect-error upgrade typescript v4.9.5
     packages: fulfilledPackages.map((pkg) => ('version' in pkg ? pkgToPkgKey(pkg) : pkg.name)),
     nonFatalErrors: [...rejectedPackages, ...rejectedPolicies],
   };
diff --git a/x-pack/plugins/index_lifecycle_management/public/application/sections/edit_policy/form/form_errors_context.tsx b/x-pack/plugins/index_lifecycle_management/public/application/sections/edit_policy/form/form_errors_context.tsx
index 70199e08aa3084..dfe7858eb3c7de 100644
--- a/x-pack/plugins/index_lifecycle_management/public/application/sections/edit_policy/form/form_errors_context.tsx
+++ b/x-pack/plugins/index_lifecycle_management/public/application/sections/edit_policy/form/form_errors_context.tsx
@@ -86,6 +86,7 @@ export const FormErrorsProvider: FunctionComponent = ({ children }) => {
           const nextHasErrors =
             Object.keys(restOfPhaseErrors).length > 0 ||
             Object.values(otherPhases).some((phaseErrors) => {
+              // @ts-expect-error upgrade typescript v4.9.5
               return Object.keys(phaseErrors).length > 0;
             });
 
diff --git a/x-pack/plugins/infra/public/containers/metrics_source/source.tsx b/x-pack/plugins/infra/public/containers/metrics_source/source.tsx
index e543d5793339c7..336b07b6986753 100644
--- a/x-pack/plugins/infra/public/containers/metrics_source/source.tsx
+++ b/x-pack/plugins/infra/public/containers/metrics_source/source.tsx
@@ -148,6 +148,7 @@ export const withSourceProvider =
     return function ComponentWithSourceProvider(props: ComponentProps) {
       return (
         <SourceProvider sourceId={sourceId}>
+          {/* @ts-expect-error upgrade typescript v4.9.5*/}
           <Component {...props} />
         </SourceProvider>
       );
diff --git a/x-pack/plugins/infra/public/pages/metrics/metric_detail/components/section.tsx b/x-pack/plugins/infra/public/pages/metrics/metric_detail/components/section.tsx
index 4642a1981a2c17..504ca07ec0ca34 100644
--- a/x-pack/plugins/infra/public/pages/metrics/metric_detail/components/section.tsx
+++ b/x-pack/plugins/infra/public/pages/metrics/metric_detail/components/section.tsx
@@ -65,6 +65,7 @@ export const Section: FunctionComponent<SectionProps> = ({
   const childrenWithProps = Children.map(children, (child) =>
     isValidElement(child)
       ? cloneElement(child, {
+          // @ts-expect-error upgrade typescript v4.9.5
           metrics,
           onChangeRangeTime,
           isLiveStreaming,
diff --git a/x-pack/plugins/infra/public/pages/metrics/metric_detail/components/sub_section.tsx b/x-pack/plugins/infra/public/pages/metrics/metric_detail/components/sub_section.tsx
index 10d8908c793745..4d66b822661d0a 100644
--- a/x-pack/plugins/infra/public/pages/metrics/metric_detail/components/sub_section.tsx
+++ b/x-pack/plugins/infra/public/pages/metrics/metric_detail/components/sub_section.tsx
@@ -33,6 +33,7 @@ export const SubSection: FunctionComponent<SubSectionProps> = ({
   const childrenWithProps = Children.map(children, (child) => {
     if (isValidElement(child)) {
       return cloneElement(child, {
+        // @ts-expect-error upgrade typescript v4.9.5
         metric,
         id,
         onChangeRangeTime,
diff --git a/x-pack/plugins/lens/public/datasources/form_based/operations/definitions/formula/formula.test.tsx b/x-pack/plugins/lens/public/datasources/form_based/operations/definitions/formula/formula.test.tsx
index c86d12017c21a5..06a118dc165cee 100644
--- a/x-pack/plugins/lens/public/datasources/form_based/operations/definitions/formula/formula.test.tsx
+++ b/x-pack/plugins/lens/public/datasources/form_based/operations/definitions/formula/formula.test.tsx
@@ -56,10 +56,12 @@ const operationDefinitionMap: Record<string, GenericOperationDefinition> = {
   }),
   derivative: createOperationDefinitionMock('derivative', { input: 'fullReference' }),
   moving_average: createOperationDefinitionMock('moving_average', {
+    // @ts-expect-error upgrade typescript v4.9.5
     input: 'fullReference',
     operationParams: [{ name: 'window', type: 'number', required: true }],
     filterable: true,
     getErrorMessage: jest.fn(() => ['mock error']),
+    // @ts-expect-error upgrade typescript v4.9.5
     buildColumn: ({ referenceIds }, columnsParams) => ({
       label: 'moving_average',
       dataType: 'number',
diff --git a/x-pack/plugins/lens/public/debounced_component/debounced_component.test.tsx b/x-pack/plugins/lens/public/debounced_component/debounced_component.test.tsx
deleted file mode 100644
index d52eb3c5780591..00000000000000
--- a/x-pack/plugins/lens/public/debounced_component/debounced_component.test.tsx
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License
- * 2.0; you may not use this file except in compliance with the Elastic License
- * 2.0.
- */
-
-import React from 'react';
-import { mountWithIntl as mount } from '@kbn/test-jest-helpers';
-import { debouncedComponent } from './debounced_component';
-import { act } from 'react-dom/test-utils';
-
-describe('debouncedComponent', () => {
-  test('immediately renders', () => {
-    const TestComponent = debouncedComponent(({ title }: { title: string }) => {
-      return <h1>{title}</h1>;
-    });
-    expect(mount(<TestComponent title="hoi" />).html()).toMatchInlineSnapshot(`"<h1>hoi</h1>"`);
-  });
-
-  test('debounces changes', async () => {
-    const TestComponent = debouncedComponent(({ title }: { title: string }) => {
-      return <h1>{title}</h1>;
-    }, 1);
-    const component = mount(<TestComponent title="there" />);
-    component.setProps({ title: 'yall' });
-    expect(component.text()).toEqual('there');
-    await act(async () => {
-      await new Promise((r) => setTimeout(r, 10));
-    });
-    expect(component.text()).toEqual('yall');
-  });
-});
diff --git a/x-pack/plugins/lens/public/debounced_component/debounced_component.tsx b/x-pack/plugins/lens/public/debounced_component/debounced_component.tsx
deleted file mode 100644
index 1f341c39d9fadd..00000000000000
--- a/x-pack/plugins/lens/public/debounced_component/debounced_component.tsx
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License
- * 2.0; you may not use this file except in compliance with the Elastic License
- * 2.0.
- */
-
-import React, { useState, useMemo, useEffect, memo, FunctionComponent } from 'react';
-import { debounce } from 'lodash';
-
-/**
- * debouncedComponent wraps the specified React component, returning a component which
- * only renders once there is a pause in props changes for at least `delay` milliseconds.
- * During the debounce phase, it will return the previously rendered value.
- */
-export function debouncedComponent<TProps>(component: FunctionComponent<TProps>, delay = 256) {
-  const MemoizedComponent = memo(component) as unknown as FunctionComponent<TProps>;
-
-  return (props: TProps) => {
-    const [cachedProps, setCachedProps] = useState(props);
-    const debouncePropsChange = useMemo(() => debounce(setCachedProps, delay), [setCachedProps]);
-
-    // cancel debounced prop change if component has been unmounted in the meantime
-    useEffect(() => () => debouncePropsChange.cancel(), [debouncePropsChange]);
-    debouncePropsChange(props);
-
-    return React.createElement(MemoizedComponent, cachedProps);
-  };
-}
diff --git a/x-pack/plugins/lens/public/debounced_component/index.ts b/x-pack/plugins/lens/public/debounced_component/index.ts
deleted file mode 100644
index 68d247b5e3b3f9..00000000000000
--- a/x-pack/plugins/lens/public/debounced_component/index.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License
- * 2.0; you may not use this file except in compliance with the Elastic License
- * 2.0.
- */
-
-export * from './debounced_component';
diff --git a/x-pack/plugins/lens/public/editor_frame_service/editor_frame/workspace_panel/workspace_panel.test.tsx b/x-pack/plugins/lens/public/editor_frame_service/editor_frame/workspace_panel/workspace_panel.test.tsx
index 66d99d187a3690..c73f427fcd7f9b 100644
--- a/x-pack/plugins/lens/public/editor_frame_service/editor_frame/workspace_panel/workspace_panel.test.tsx
+++ b/x-pack/plugins/lens/public/editor_frame_service/editor_frame/workspace_panel/workspace_panel.test.tsx
@@ -18,11 +18,6 @@ import {
 } from '../../../mocks';
 
 import { mockDataPlugin, mountWithProvider } from '../../../mocks';
-jest.mock('../../../debounced_component', () => {
-  return {
-    debouncedComponent: (fn: unknown) => fn,
-  };
-});
 
 import { WorkspacePanel } from './workspace_panel';
 import { ReactWrapper } from 'enzyme';
diff --git a/x-pack/plugins/lens/public/editor_frame_service/editor_frame/workspace_panel/workspace_panel.tsx b/x-pack/plugins/lens/public/editor_frame_service/editor_frame/workspace_panel/workspace_panel.tsx
index 842904741ec9bc..3e90a4179f9ebe 100644
--- a/x-pack/plugins/lens/public/editor_frame_service/editor_frame/workspace_panel/workspace_panel.tsx
+++ b/x-pack/plugins/lens/public/editor_frame_service/editor_frame/workspace_panel/workspace_panel.tsx
@@ -777,6 +777,7 @@ export const VisualizationWrapper = ({
         searchSessionId={searchSessionId}
         onEvent={onEvent}
         hasCompatibleActions={hasCompatibleActions}
+        // @ts-expect-error upgrade typescript v4.9.5
         onData$={onData$}
         onRender$={onRenderHandler}
         inspectorAdapters={lensInspector.adapters}
diff --git a/x-pack/plugins/lens/public/embeddable/expression_wrapper.tsx b/x-pack/plugins/lens/public/embeddable/expression_wrapper.tsx
index 8540058683c11a..63a2a6aabe3fe3 100644
--- a/x-pack/plugins/lens/public/embeddable/expression_wrapper.tsx
+++ b/x-pack/plugins/lens/public/embeddable/expression_wrapper.tsx
@@ -86,6 +86,7 @@ export function ExpressionWrapper({
           interactive={interactive}
           searchContext={searchContext}
           searchSessionId={searchSessionId}
+          // @ts-expect-error upgrade typescript v4.9.5
           onData$={onData$}
           onRender$={onRender$}
           inspectorAdapters={lensInspector.adapters}
diff --git a/x-pack/plugins/lens/public/state_management/lens_slice.ts b/x-pack/plugins/lens/public/state_management/lens_slice.ts
index b7b02bdbc934b4..dc59192c2d1956 100644
--- a/x-pack/plugins/lens/public/state_management/lens_slice.ts
+++ b/x-pack/plugins/lens/public/state_management/lens_slice.ts
@@ -877,7 +877,7 @@ export const makeLensReducer = (storeDeps: LensStoreDeps) => {
           activeVisualization.removeLayer &&
           state.visualization.state
         ) {
-          const updater = layerIds.reduce(
+          const updater = layerIds.reduce<unknown>(
             (acc, layerId) =>
               activeVisualization.removeLayer ? activeVisualization.removeLayer(acc, layerId) : acc,
             state.visualization.state
diff --git a/x-pack/plugins/lens/server/migrations/common_migrations.ts b/x-pack/plugins/lens/server/migrations/common_migrations.ts
index c1be1008ad682d..f6a683afc22973 100644
--- a/x-pack/plugins/lens/server/migrations/common_migrations.ts
+++ b/x-pack/plugins/lens/server/migrations/common_migrations.ts
@@ -502,7 +502,11 @@ export const commonMigratePartitionChartGroups = (
   }>
 ): LensDocShape850<{
   shape: string;
-  layers: Array<{ primaryGroups?: string[]; secondaryGroups?: string[] }>;
+  layers: Array<{
+    primaryGroups?: string[];
+    secondaryGroups?: string[];
+    [key: string]: unknown; // unknown carryover key/values
+  }>;
 }> => {
   if (
     attributes.state.visualization?.layers &&
diff --git a/x-pack/plugins/lists/server/routes/utils/build_siem_response.ts b/x-pack/plugins/lists/server/routes/utils/build_siem_response.ts
index d61a02a869d28a..99552d332eca22 100644
--- a/x-pack/plugins/lists/server/routes/utils/build_siem_response.ts
+++ b/x-pack/plugins/lists/server/routes/utils/build_siem_response.ts
@@ -48,12 +48,15 @@ const statusToErrorMessage = (
 export class SiemResponseFactory {
   constructor(private response: KibanaResponseFactory) {}
 
+  // @ts-expect-error upgrade typescript v4.9.5
   // eslint-disable-next-line @typescript-eslint/explicit-function-return-type
   error<T>({ statusCode, body, headers, bypassErrorFormat }: CustomHttpResponseOptions<T>) {
     // KibanaResponse is not exported so we cannot use a return type here and that is why the linter is turned off above
+    // @ts-expect-error upgrade typescript v4.9.5
     const contentType: CustomHttpResponseOptions<T>['headers'] = {
       'content-type': 'application/json',
     };
+    // @ts-expect-error upgrade typescript v4.9.5
     const defaultedHeaders: CustomHttpResponseOptions<T>['headers'] = {
       ...contentType,
       ...(headers ?? {}),
diff --git a/x-pack/plugins/logs_shared/public/components/logging/log_text_stream/vertical_scroll_panel.tsx b/x-pack/plugins/logs_shared/public/components/logging/log_text_stream/vertical_scroll_panel.tsx
index 81d77aa66c1a51..99219b5c77507c 100644
--- a/x-pack/plugins/logs_shared/public/components/logging/log_text_stream/vertical_scroll_panel.tsx
+++ b/x-pack/plugins/logs_shared/public/components/logging/log_text_stream/vertical_scroll_panel.tsx
@@ -104,6 +104,7 @@ export class VerticalScrollPanel<Child> extends React.PureComponent<
       },
     } = this;
 
+    // @ts-expect-error upgrade typescript v4.9.5
     return getVisibleChildren(Array.from(childDimensions.entries()), scrollViewHeight, scrollTop);
   };
 
@@ -135,8 +136,11 @@ export class VerticalScrollPanel<Child> extends React.PureComponent<
     }
 
     onVisibleChildrenChange({
+      // @ts-expect-error upgrade typescript v4.9.5
       bottomChild: visibleChildren.bottomChild,
+      // @ts-expect-error upgrade typescript v4.9.5
       middleChild: visibleChildren.middleChild,
+      // @ts-expect-error upgrade typescript v4.9.5
       topChild: visibleChildren.topChild,
       fromScroll,
       ...scrollPosition,
@@ -205,6 +209,7 @@ export class VerticalScrollPanel<Child> extends React.PureComponent<
       if (visibleChildren) {
         return {
           scrollOffset: visibleChildren.middleChildOffset,
+          // @ts-expect-error upgrade typescript v4.9.5
           scrollTarget: visibleChildren.middleChild,
         };
       }
diff --git a/x-pack/plugins/maps/public/classes/sources/es_source/es_source.ts b/x-pack/plugins/maps/public/classes/sources/es_source/es_source.ts
index d982bfaf09f5d7..0e5a48b3d58272 100644
--- a/x-pack/plugins/maps/public/classes/sources/es_source/es_source.ts
+++ b/x-pack/plugins/maps/public/classes/sources/es_source/es_source.ts
@@ -185,9 +185,11 @@ export class AbstractESSource extends AbstractVectorSource implements IESSource
       const buffer: MapExtent =
         'isGeoGridPrecisionAware' in this &&
         'getGeoGridPrecision' in this &&
+        // @ts-expect-error upgrade typescript v4.9.5
         (this as IESAggSource).isGeoGridPrecisionAware()
           ? expandToTileBoundaries(
               requestMeta.buffer,
+              // @ts-expect-error upgrade typescript v4.9.5
               (this as IESAggSource).getGeoGridPrecision(requestMeta.zoom)
             )
           : requestMeta.buffer;
diff --git a/x-pack/plugins/maps/public/classes/styles/vector/properties/dynamic_style_property.tsx b/x-pack/plugins/maps/public/classes/styles/vector/properties/dynamic_style_property.tsx
index 9fc1ccaf38c843..72a930553f4ec5 100644
--- a/x-pack/plugins/maps/public/classes/styles/vector/properties/dynamic_style_property.tsx
+++ b/x-pack/plugins/maps/public/classes/styles/vector/properties/dynamic_style_property.tsx
@@ -350,6 +350,7 @@ export class DynamicStyleProperty<T>
   }
 
   getDataMappingFunction() {
+    // @ts-expect-error upgrade typescript v4.9.5
     return 'dataMappingFunction' in this._options
       ? (this._options as T & { dataMappingFunction: DATA_MAPPING_FUNCTION }).dataMappingFunction
       : DATA_MAPPING_FUNCTION.INTERPOLATE;
diff --git a/x-pack/plugins/maps/public/classes/styles/vector/symbol_utils.tsx b/x-pack/plugins/maps/public/classes/styles/vector/symbol_utils.tsx
index 5a2c1bc687a0e5..a0a2b27abb2f44 100644
--- a/x-pack/plugins/maps/public/classes/styles/vector/symbol_utils.tsx
+++ b/x-pack/plugins/maps/public/classes/styles/vector/symbol_utils.tsx
@@ -59,6 +59,7 @@ export async function createSdfIcon({
   svgCanvas.width = size;
   svgCanvas.height = size;
   const svgCtx = svgCanvas.getContext('2d');
+  // @ts-expect-error upgrade typescript v4.9.5
   const v = Canvg.fromString(svgCtx, svg, {
     ignoreDimensions: true,
     offsetX: buffer / 2,
diff --git a/x-pack/plugins/maps/public/lazy_wrapper.tsx b/x-pack/plugins/maps/public/lazy_wrapper.tsx
index 38740267f39b4d..184cbc310da465 100644
--- a/x-pack/plugins/maps/public/lazy_wrapper.tsx
+++ b/x-pack/plugins/maps/public/lazy_wrapper.tsx
@@ -24,6 +24,7 @@ export function LazyWrapper<T>({ getLazyComponent, lazyComponentProps }: Props<T
   return (
     <EuiErrorBoundary>
       <Suspense fallback={<Fallback />}>
+        {/* @ts-expect-error upgrade typescript v4.9.5*/}
         <LazyComponent {...lazyComponentProps} />
       </Suspense>
     </EuiErrorBoundary>
diff --git a/x-pack/plugins/observability_solution/apm/server/lib/helpers/transactions/get_is_using_transaction_events.test.ts b/x-pack/plugins/observability_solution/apm/server/lib/helpers/transactions/get_is_using_transaction_events.test.ts
index ff118ed5b16c63..9ea7b81ea710cb 100644
--- a/x-pack/plugins/observability_solution/apm/server/lib/helpers/transactions/get_is_using_transaction_events.test.ts
+++ b/x-pack/plugins/observability_solution/apm/server/lib/helpers/transactions/get_is_using_transaction_events.test.ts
@@ -116,9 +116,11 @@ describe('getIsUsingTransactionEvents', () => {
         {
           config,
           mockResponse: (request) => {
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_aggregated_transactions') {
               return mockResponseSomeHits;
             }
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_transactions') {
               return mockResponseNoHits;
             }
@@ -141,9 +143,11 @@ describe('getIsUsingTransactionEvents', () => {
         {
           config,
           mockResponse: (request) => {
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_aggregated_transactions') {
               return mockResponseNoHits;
             }
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_transactions') {
               return mockResponseSomeHits;
             }
@@ -199,9 +203,11 @@ describe('getIsUsingTransactionEvents', () => {
         {
           config,
           mockResponse: (request) => {
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_aggregated_transactions') {
               return mockResponseSomeHits;
             }
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_transactions') {
               return mockResponseNoHits;
             }
@@ -224,9 +230,11 @@ describe('getIsUsingTransactionEvents', () => {
         {
           config,
           mockResponse: (request) => {
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_aggregated_transactions') {
               return mockResponseNoHits;
             }
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_transactions') {
               return mockResponseSomeHits;
             }
@@ -249,9 +257,11 @@ describe('getIsUsingTransactionEvents', () => {
         {
           config,
           mockResponse: (request) => {
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_aggregated_transactions') {
               return mockResponseSomeHits;
             }
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_transactions') {
               return mockResponseNoHits;
             }
@@ -273,9 +283,11 @@ describe('getIsUsingTransactionEvents', () => {
         {
           config,
           mockResponse: (request) => {
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_aggregated_transactions') {
               return mockResponseNoHits;
             }
+            // @ts-expect-error upgrade typescript v4.9.5
             if (request === 'get_has_transactions') {
               return mockResponseSomeHits;
             }
diff --git a/x-pack/plugins/observability_solution/logs_explorer/public/utils/proxies.ts b/x-pack/plugins/observability_solution/logs_explorer/public/utils/proxies.ts
index 5599f061f4d672..cfe4c133ec328a 100644
--- a/x-pack/plugins/observability_solution/logs_explorer/public/utils/proxies.ts
+++ b/x-pack/plugins/observability_solution/logs_explorer/public/utils/proxies.ts
@@ -21,7 +21,7 @@ export const createPropertyGetProxy = <Target extends object, Key extends keyof
 ) =>
   new Proxy(target, {
     get(accessedTarget, accessedKey, ...rest) {
-      const value = Reflect.get(accessedTarget, accessedKey, ...rest);
+      const value = Reflect.get(accessedTarget, accessedKey, ...rest) as Target[Key];
       if (hasKey(replacements, accessedKey)) {
         return replacements[accessedKey](value);
       } else {
diff --git a/x-pack/plugins/observability_solution/observability/public/pages/slo_edit/shared_flyout/slo_form.tsx b/x-pack/plugins/observability_solution/observability/public/pages/slo_edit/shared_flyout/slo_form.tsx
index 5588e27163893a..8c105e6159797c 100644
--- a/x-pack/plugins/observability_solution/observability/public/pages/slo_edit/shared_flyout/slo_form.tsx
+++ b/x-pack/plugins/observability_solution/observability/public/pages/slo_edit/shared_flyout/slo_form.tsx
@@ -25,6 +25,7 @@ function suspendedComponentWithProps<T = unknown>(
 ) {
   return (props: T) => (
     <Suspense fallback={<CenterJustifiedSpinner size={size ?? 'm'} />}>
+      {/* @ts-expect-error upgrade typescript v4.9.5 */}
       <ComponentToSuspend {...props} />
     </Suspense>
   );
diff --git a/x-pack/plugins/observability_solution/observability_shared/public/contexts/inspector/inspector_context.tsx b/x-pack/plugins/observability_solution/observability_shared/public/contexts/inspector/inspector_context.tsx
index 0b87f0e4a5476c..208788b9b9aede 100644
--- a/x-pack/plugins/observability_solution/observability_shared/public/contexts/inspector/inspector_context.tsx
+++ b/x-pack/plugins/observability_solution/observability_shared/public/contexts/inspector/inspector_context.tsx
@@ -13,7 +13,7 @@ import { FetcherResult } from '../../hooks/use_fetcher';
 type InspectResponse = Request[];
 
 export interface InspectorContextValue {
-  addInspectorRequest: <Data>(result: FetcherResult<Data>) => void;
+  addInspectorRequest: (result: FetcherResult<any>) => void;
   inspectorAdapters: { requests: RequestAdapter };
 }
 
@@ -24,12 +24,12 @@ const value: InspectorContextValue = {
 
 export const InspectorContext = createContext<InspectorContextValue>(value);
 
-export type AddInspectorRequest = (
-  result: FetcherResult<{
-    mainStatisticsData?: { _inspect?: InspectResponse };
-    _inspect?: InspectResponse;
-  }>
-) => void;
+export interface InspectorRequestProps {
+  mainStatisticsData?: { _inspect?: InspectResponse };
+  _inspect?: InspectResponse;
+}
+
+export type AddInspectorRequest = (result: FetcherResult<InspectorRequestProps>) => void;
 
 export function InspectorContextProvider({ children }: { children: ReactNode }) {
   const history = useHistory();
diff --git a/x-pack/plugins/observability_solution/synthetics/common/runtime_types/monitor_management/locations.ts b/x-pack/plugins/observability_solution/synthetics/common/runtime_types/monitor_management/locations.ts
index 60c74be13c2283..4445fd22172cf1 100644
--- a/x-pack/plugins/observability_solution/synthetics/common/runtime_types/monitor_management/locations.ts
+++ b/x-pack/plugins/observability_solution/synthetics/common/runtime_types/monitor_management/locations.ts
@@ -133,6 +133,7 @@ export const ServiceLocationsApiResponseCodec = t.interface({
   throttling: t.union([ThrottlingOptionsCodec, t.undefined]),
   locations: ServiceLocationsCodec,
 });
+export type ServiceLocationsApiResponse = t.TypeOf<typeof ServiceLocationsApiResponseCodec>;
 
 export type ManifestLocation = t.TypeOf<typeof ManifestLocationCodec>;
 export type ServiceLocation = t.TypeOf<typeof ServiceLocationCodec>;
diff --git a/x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/components/monitor_add_edit/form/validation.tsx b/x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/components/monitor_add_edit/form/validation.tsx
index c22a89f63fa14b..7b6fa39b97c543 100644
--- a/x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/components/monitor_add_edit/form/validation.tsx
+++ b/x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/components/monitor_add_edit/form/validation.tsx
@@ -21,7 +21,7 @@ export const FLOATS_ONLY = /^[0-9]+(.?[0-9]+)?$/;
 type ValidationLibrary = Record<string, Validator>;
 
 // returns true if invalid
-export function validateHeaders<T>(headers: T): boolean {
+export function validateHeaders(headers: object): boolean {
   return Object.keys(headers).some((key) => {
     if (key) {
       const whiteSpaceRegEx = /[\s]/g;
@@ -110,11 +110,11 @@ const validateHTTP: ValidationLibrary = {
   },
   [ConfigKey.RESPONSE_HEADERS_CHECK]: ({ [ConfigKey.RESPONSE_HEADERS_CHECK]: value }) => {
     const headers = value as MonitorFields[ConfigKey.RESPONSE_HEADERS_CHECK];
-    return validateHeaders<MonitorFields[ConfigKey.RESPONSE_HEADERS_CHECK]>(headers);
+    return validateHeaders(headers);
   },
   [ConfigKey.REQUEST_HEADERS_CHECK]: ({ [ConfigKey.REQUEST_HEADERS_CHECK]: value }) => {
     const headers = value as MonitorFields[ConfigKey.REQUEST_HEADERS_CHECK];
-    return validateHeaders<MonitorFields[ConfigKey.REQUEST_HEADERS_CHECK]>(headers);
+    return validateHeaders(headers);
   },
   [ConfigKey.MAX_REDIRECTS]: ({ [ConfigKey.MAX_REDIRECTS]: value }) =>
     (!!value && !`${value}`.match(DIGITS_ONLY)) ||
diff --git a/x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/state/service_locations/api.ts b/x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/state/service_locations/api.ts
index e383905de552e7..28102ee31afd3c 100644
--- a/x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/state/service_locations/api.ts
+++ b/x-pack/plugins/observability_solution/synthetics/public/apps/synthetics/state/service_locations/api.ts
@@ -8,6 +8,7 @@
 import { SYNTHETICS_API_URLS } from '../../../../../common/constants';
 import {
   ServiceLocations,
+  ServiceLocationsApiResponse,
   ServiceLocationsApiResponseCodec,
   ThrottlingOptions,
 } from '../../../../../common/runtime_types';
@@ -17,7 +18,7 @@ export const fetchServiceLocations = async (): Promise<{
   throttling: ThrottlingOptions | undefined;
   locations: ServiceLocations;
 }> => {
-  const { throttling, locations } = await apiService.get(
+  const { throttling, locations } = await apiService.get<ServiceLocationsApiResponse>(
     SYNTHETICS_API_URLS.SERVICE_LOCATIONS,
     undefined,
     ServiceLocationsApiResponseCodec
diff --git a/x-pack/plugins/observability_solution/synthetics/public/utils/api_service/api_service.ts b/x-pack/plugins/observability_solution/synthetics/public/utils/api_service/api_service.ts
index e077e37d098355..5aac19589bf685 100644
--- a/x-pack/plugins/observability_solution/synthetics/public/utils/api_service/api_service.ts
+++ b/x-pack/plugins/observability_solution/synthetics/public/utils/api_service/api_service.ts
@@ -9,6 +9,7 @@ import { isRight } from 'fp-ts/lib/Either';
 import { formatErrors } from '@kbn/securitysolution-io-ts-utils';
 import { HttpFetchQuery, HttpSetup } from '@kbn/core/public';
 import { FETCH_STATUS, AddInspectorRequest } from '@kbn/observability-shared-plugin/public';
+import { InspectorRequestProps } from '@kbn/observability-shared-plugin/public/contexts/inspector/inspector_context';
 type Params = HttpFetchQuery & { version?: string };
 class ApiService {
   private static instance: ApiService;
@@ -68,7 +69,11 @@ class ApiService {
       version,
     });
 
-    this.addInspectorRequest?.({ data: response, status: FETCH_STATUS.SUCCESS, loading: false });
+    this.addInspectorRequest?.({
+      data: response as InspectorRequestProps,
+      status: FETCH_STATUS.SUCCESS,
+      loading: false,
+    });
 
     return this.parseResponse(response, apiUrl, decodeType);
   }
@@ -83,7 +88,11 @@ class ApiService {
       version,
     });
 
-    this.addInspectorRequest?.({ data: response, status: FETCH_STATUS.SUCCESS, loading: false });
+    this.addInspectorRequest?.({
+      data: response as InspectorRequestProps,
+      status: FETCH_STATUS.SUCCESS,
+      loading: false,
+    });
 
     return this.parseResponse(response, apiUrl, decodeType);
   }
diff --git a/x-pack/plugins/observability_solution/synthetics/server/routes/create_route_with_auth.ts b/x-pack/plugins/observability_solution/synthetics/server/routes/create_route_with_auth.ts
index d9b6f672eb3e0d..aa254e275b9b0a 100644
--- a/x-pack/plugins/observability_solution/synthetics/server/routes/create_route_with_auth.ts
+++ b/x-pack/plugins/observability_solution/synthetics/server/routes/create_route_with_auth.ts
@@ -5,6 +5,7 @@
  * 2.0.
  */
 
+import { HttpResponsePayload, ResponseError } from '@kbn/core-http-server';
 import { ILicense } from '@kbn/licensing-plugin/server';
 import {
   LICENSE_MISSING_ERROR,
@@ -23,7 +24,9 @@ function getDefaultWriteAccessFlag(method: SupportedMethod) {
   return method !== 'GET';
 }
 
-export const createSyntheticsRouteWithAuth = <ClientContract = unknown>(
+export const createSyntheticsRouteWithAuth = <
+  ClientContract extends HttpResponsePayload | ResponseError = any
+>(
   routeCreator: SyntheticsRestApiRouteFactory
 ): SyntheticsRoute<ClientContract> => {
   const restRoute = routeCreator();
diff --git a/x-pack/plugins/observability_solution/synthetics/server/routes/types.ts b/x-pack/plugins/observability_solution/synthetics/server/routes/types.ts
index aa3f161675ae83..dfbcac3d3b9830 100644
--- a/x-pack/plugins/observability_solution/synthetics/server/routes/types.ts
+++ b/x-pack/plugins/observability_solution/synthetics/server/routes/types.ts
@@ -16,7 +16,7 @@ import {
   KibanaResponseFactory,
   IKibanaResponse,
 } from '@kbn/core/server';
-import { FullValidationConfig } from '@kbn/core-http-server';
+import { FullValidationConfig, HttpResponsePayload, ResponseError } from '@kbn/core-http-server';
 import { UptimeEsClient } from '../lib';
 import { SyntheticsServerSetup, UptimeRequestHandlerContext } from '../types';
 import { SyntheticsMonitorClient } from '../synthetics_service/synthetics_monitor/synthetics_monitor_client';
@@ -60,14 +60,14 @@ export type UMKibanaRoute = UMRouteDefinition<
 >;
 
 export type SyntheticsRestApiRouteFactory<
-  ClientContract = any,
+  ClientContract extends HttpResponsePayload | ResponseError = any,
   Params = any,
   Query = Record<string, any>,
   Body = any
 > = () => SyntheticsRoute<ClientContract, Params, Query, Body>;
 
 export type SyntheticsRoute<
-  ClientContract = unknown,
+  ClientContract extends HttpResponsePayload | ResponseError = any,
   Params = Record<string, any>,
   Query = Record<string, any>,
   Body = any
@@ -106,7 +106,7 @@ export interface RouteContext<
 }
 
 export type SyntheticsRouteHandler<
-  ClientContract,
+  ClientContract extends HttpResponsePayload | ResponseError = any,
   Params = Record<string, any>,
   Query = Record<string, any>,
   Body = any
@@ -117,5 +117,5 @@ export type SyntheticsRouteHandler<
   response,
   server,
   savedObjectsClient,
-  subject: Subject,
+  subject,
 }: RouteContext<Params, Query, Body>) => Promise<IKibanaResponse<ClientContract> | ClientContract>;
diff --git a/x-pack/plugins/observability_solution/synthetics/server/synthetics_service/service_api_client.ts b/x-pack/plugins/observability_solution/synthetics/server/synthetics_service/service_api_client.ts
index e30b9a18872a9f..92d29145593abf 100644
--- a/x-pack/plugins/observability_solution/synthetics/server/synthetics_service/service_api_client.ts
+++ b/x-pack/plugins/observability_solution/synthetics/server/synthetics_service/service_api_client.ts
@@ -280,15 +280,20 @@ export class ServiceAPIClient {
     };
   }
 
+  isLoggable(result: unknown): result is { status?: any; request?: any } {
+    const objCast = result as object;
+    return Object.keys(objCast).some((k) => k === 'status' || k === 'request');
+  }
+
   logSuccessMessage(
     url: string,
     method: string,
     numMonitors: number,
-    result: AxiosResponse<any> | ServicePayload
+    result: AxiosResponse<unknown> | ServicePayload
   ) {
-    if ('status' in result || 'request' in result) {
+    if (this.isLoggable(result)) {
       if (result.data) {
-        this.logger.debug(result.data);
+        this.logger.debug(result.data as any);
       }
       this.logger.debug(
         `Successfully called service location ${url}${result.request?.path} with method ${method} with ${numMonitors} monitors`
diff --git a/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/components/common/monitor_tags.test.tsx b/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/components/common/monitor_tags.test.tsx
index 2bfe598a585751..ab79fe400221e3 100644
--- a/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/components/common/monitor_tags.test.tsx
+++ b/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/components/common/monitor_tags.test.tsx
@@ -143,6 +143,7 @@ describe('MonitorTags component', () => {
   });
 
   it('render against summary', () => {
+    // @ts-expect-error upgrade typescript v4.9.5 test object types do not correspond 100%
     const component = shallowWithRouter(<MonitorTags summary={summaryPing} />);
     // dive() removes all unnecessary React-Router wrapping elements
     expect(component.dive()).toMatchSnapshot();
diff --git a/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/state/api/utils.ts b/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/state/api/utils.ts
index 5fed6706b95364..6443b1b1bd103a 100644
--- a/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/state/api/utils.ts
+++ b/x-pack/plugins/observability_solution/uptime/public/legacy_uptime/state/api/utils.ts
@@ -9,6 +9,7 @@ import { isRight } from 'fp-ts/lib/Either';
 import { formatErrors } from '@kbn/securitysolution-io-ts-utils';
 import { HttpFetchQuery, HttpSetup } from '@kbn/core/public';
 import { FETCH_STATUS, AddInspectorRequest } from '@kbn/observability-shared-plugin/public';
+import { InspectorRequestProps } from '@kbn/observability-shared-plugin/public/contexts/inspector/inspector_context';
 
 type Params = HttpFetchQuery & { version?: string };
 class ApiService {
@@ -51,7 +52,11 @@ class ApiService {
       version,
     });
 
-    this.addInspectorRequest?.({ data: response, status: FETCH_STATUS.SUCCESS, loading: false });
+    this.addInspectorRequest?.({
+      data: response as InspectorRequestProps,
+      status: FETCH_STATUS.SUCCESS,
+      loading: false,
+    });
 
     if (decodeType) {
       const decoded = decodeType.decode(response);
@@ -80,7 +85,11 @@ class ApiService {
       version,
     });
 
-    this.addInspectorRequest?.({ data: response, status: FETCH_STATUS.SUCCESS, loading: false });
+    this.addInspectorRequest?.({
+      data: response as InspectorRequestProps,
+      status: FETCH_STATUS.SUCCESS,
+      loading: false,
+    });
 
     if (decodeType) {
       const decoded = decodeType.decode(response);
diff --git a/x-pack/plugins/observability_solution/uptime/public/utils/api_service/api_service.ts b/x-pack/plugins/observability_solution/uptime/public/utils/api_service/api_service.ts
index b73b353f708f2e..95d0886954e643 100644
--- a/x-pack/plugins/observability_solution/uptime/public/utils/api_service/api_service.ts
+++ b/x-pack/plugins/observability_solution/uptime/public/utils/api_service/api_service.ts
@@ -9,6 +9,7 @@ import { isRight } from 'fp-ts/lib/Either';
 import { formatErrors } from '@kbn/securitysolution-io-ts-utils';
 import { HttpFetchQuery, HttpSetup } from '@kbn/core/public';
 import { FETCH_STATUS, AddInspectorRequest } from '@kbn/observability-shared-plugin/public';
+import { InspectorRequestProps } from '@kbn/observability-shared-plugin/public/contexts/inspector/inspector_context';
 
 class ApiService {
   private static instance: ApiService;
@@ -53,7 +54,11 @@ class ApiService {
       asResponse,
     });
 
-    this.addInspectorRequest?.({ data: response, status: FETCH_STATUS.SUCCESS, loading: false });
+    this.addInspectorRequest?.({
+      data: response as InspectorRequestProps,
+      status: FETCH_STATUS.SUCCESS,
+      loading: false,
+    });
 
     if (decodeType) {
       const decoded = decodeType.decode(response);
@@ -80,7 +85,11 @@ class ApiService {
       query: params,
     });
 
-    this.addInspectorRequest?.({ data: response, status: FETCH_STATUS.SUCCESS, loading: false });
+    this.addInspectorRequest?.({
+      data: response as InspectorRequestProps,
+      status: FETCH_STATUS.SUCCESS,
+      loading: false,
+    });
 
     if (decodeType) {
       const decoded = decodeType.decode(response);
diff --git a/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/lib/requests/search/query_context.ts b/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/lib/requests/search/query_context.ts
index 0c88a2527aa4b5..1ab9d9ece169ff 100644
--- a/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/lib/requests/search/query_context.ts
+++ b/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/lib/requests/search/query_context.ts
@@ -7,7 +7,8 @@
 
 import moment from 'moment';
 import type { ESFilter } from '@kbn/es-types';
-import { CursorPagination } from './types';
+import type { SearchRequest } from '@kbn/data-plugin/common';
+import type { CursorPagination } from './types';
 import { CursorDirection, SortOrder } from '../../../../../common/runtime_types';
 import { UptimeEsClient } from '../../lib';
 import { parseRelativeDate } from '../../../../../common/lib/get_histogram_interval';
@@ -43,7 +44,7 @@ export class QueryContext {
     this.query = query;
   }
 
-  async search<TParams>(params: TParams, operationName?: string) {
+  async search<TParams extends SearchRequest>(params: TParams, operationName?: string) {
     return this.callES.search(params, operationName);
   }
 
diff --git a/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/lib/requests/search/refine_potential_matches.ts b/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/lib/requests/search/refine_potential_matches.ts
index c1e4150f11cf33..7956966ec71c56 100644
--- a/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/lib/requests/search/refine_potential_matches.ts
+++ b/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/lib/requests/search/refine_potential_matches.ts
@@ -99,6 +99,7 @@ export const summaryPingsToSummary = (summaryPings: Ping[]): MonitorSummary => {
         status: summaryPings.some((p) => (p.summary?.down ?? 0) > 0) ? 'down' : 'up',
       },
       summaryPings,
+      // @ts-expect-error upgrade typescript v4.9.5
       tls: latest.tls,
       // easier to ensure to use '' for an empty geo name in terms of types
       observer: {
diff --git a/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/routes/types.ts b/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/routes/types.ts
index 22e34437e5d1b2..d7ab40c4891d1c 100644
--- a/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/routes/types.ts
+++ b/x-pack/plugins/observability_solution/uptime/server/legacy_uptime/routes/types.ts
@@ -100,7 +100,7 @@ export type UMRouteHandler<ClientContract = unknown> = ({
   response,
   server,
   savedObjectsClient,
-  subject,
+  subject, // @ts-expect-error upgrade typescript v4.9.5
 }: UptimeRouteContext) => Promise<IKibanaResponse<ClientContract> | ClientContract>;
 
 export interface RouteContext<Query = Record<string, any>> {
diff --git a/x-pack/plugins/observability_solution/ux/public/application/ux_app.tsx b/x-pack/plugins/observability_solution/ux/public/application/ux_app.tsx
index e8fdbb96b5e7ba..e9e7d72dd72048 100644
--- a/x-pack/plugins/observability_solution/ux/public/application/ux_app.tsx
+++ b/x-pack/plugins/observability_solution/ux/public/application/ux_app.tsx
@@ -49,6 +49,7 @@ import { PluginContext } from '../context/plugin_context';
 
 export type BreadcrumbTitle<T = {}> =
   | string
+  // @ts-expect-error upgrade typescript v4.9.5
   | ((props: RouteComponentProps<T>) => string)
   | null;
 
diff --git a/x-pack/plugins/observability_solution/ux/public/components/app/rum_dashboard/ux_overview_fetchers.ts b/x-pack/plugins/observability_solution/ux/public/components/app/rum_dashboard/ux_overview_fetchers.ts
index c15043181aa858..f4841d6a10d8e1 100644
--- a/x-pack/plugins/observability_solution/ux/public/components/app/rum_dashboard/ux_overview_fetchers.ts
+++ b/x-pack/plugins/observability_solution/ux/public/components/app/rum_dashboard/ux_overview_fetchers.ts
@@ -132,6 +132,7 @@ async function esQuery<T>(
   dataStartPlugin: DataPublicPluginStart,
   query: IKibanaSearchRequest<T> & { params: { index?: string } }
 ) {
+  // @ts-expect-error upgrade typescript v4.9.5
   return new Promise<ESSearchResponse<{}, T, { restTotalHitsAsInt: false }>>(
     (resolve, reject) => {
       const search$ = dataStartPlugin.search
diff --git a/x-pack/plugins/osquery/common/utility_types.ts b/x-pack/plugins/osquery/common/utility_types.ts
index 75a30adad3bf16..17e1bb65dfd648 100644
--- a/x-pack/plugins/osquery/common/utility_types.ts
+++ b/x-pack/plugins/osquery/common/utility_types.ts
@@ -20,8 +20,10 @@ export const unionWithNullType = <T extends runtimeTypes.Mixed>(type: T) =>
 export const stringEnum = <T>(enumObj: T, enumName = 'enum') =>
   new runtimeTypes.Type<T[keyof T], string>(
     enumName,
+    // @ts-expect-error upgrade typescript v4.9.5
     (u): u is T[keyof T] => Object.values(enumObj).includes(u),
     (u, c) =>
+      // @ts-expect-error upgrade typescript v4.9.5
       Object.values(enumObj).includes(u)
         ? runtimeTypes.success(u as T[keyof T])
         : runtimeTypes.failure(u, c),
diff --git a/x-pack/plugins/security_solution/common/endpoint/generate_data.ts b/x-pack/plugins/security_solution/common/endpoint/generate_data.ts
index 29d0edd91b23ed..7e93b7126ddbdb 100644
--- a/x-pack/plugins/security_solution/common/endpoint/generate_data.ts
+++ b/x-pack/plugins/security_solution/common/endpoint/generate_data.ts
@@ -1656,6 +1656,7 @@ export class EndpointDocGenerator extends BaseDataGenerator {
       path: '/package/endpoint/0.5.0',
       icons: [
         {
+          // @ts-expect-error upgrade typescript v4.9.5
           path: '/package/endpoint/0.5.0/img/logo-endpoint-64-color.svg',
           src: '/img/logo-endpoint-64-color.svg',
           size: '16x16',
@@ -1740,6 +1741,7 @@ export class EndpointDocGenerator extends BaseDataGenerator {
       assets: {} as AssetsGroupedByServiceByType,
       icons: [
         {
+          // @ts-expect-error upgrade typescript v4.9.5
           path: '/package/endpoint/0.5.0/img/logo-endpoint-64-color.svg',
           src: '/img/logo-endpoint-64-color.svg',
           size: '16x16',
diff --git a/x-pack/plugins/security_solution/common/utility_types.ts b/x-pack/plugins/security_solution/common/utility_types.ts
index aaf1dfafb65756..bab5ecb40ce411 100644
--- a/x-pack/plugins/security_solution/common/utility_types.ts
+++ b/x-pack/plugins/security_solution/common/utility_types.ts
@@ -37,7 +37,7 @@ type NonAny = number | boolean | string | symbol | null;
 export const unionWithNullType = <T extends runtimeTypes.Mixed>(type: T) =>
   runtimeTypes.union([type, runtimeTypes.null]);
 
-export const stringEnum = <T>(enumObj: T, enumName = 'enum') =>
+export const stringEnum = <T extends object>(enumObj: T, enumName = 'enum') =>
   new runtimeTypes.Type<T[keyof T], string>(
     enumName,
     (u): u is T[keyof T] => Object.values(enumObj).includes(u),
diff --git a/x-pack/plugins/security_solution/public/common/components/page/manage_query.tsx b/x-pack/plugins/security_solution/public/common/components/page/manage_query.tsx
index bfb439a8872ec0..ce8c9d3f681754 100644
--- a/x-pack/plugins/security_solution/public/common/components/page/manage_query.tsx
+++ b/x-pack/plugins/security_solution/public/common/components/page/manage_query.tsx
@@ -43,6 +43,7 @@ export function manageQuery<T>(
     });
 
     const otherProps = omit(['refetch', 'setQuery'], props);
+    // @ts-expect-error upgrade typescript v4.9.5
     return <WrappedComponent {...(otherProps as T)} />;
   };
 
diff --git a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/network/dns_top_domains.ts b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/network/dns_top_domains.ts
index 39f5d56a3d4617..df4980a1e5df8f 100644
--- a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/network/dns_top_domains.ts
+++ b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/network/dns_top_domains.ts
@@ -84,6 +84,7 @@ export const getDnsTopDomainsLensAttributes: GetLensAttributes = (
                 params: {
                   query: 'PTR',
                 },
+                // @ts-expect-error upgrade typescript v4.9.5
                 indexRefName: 'filter-index-pattern-0',
               },
               query: {
diff --git a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentication_metric_failure.ts b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentication_metric_failure.ts
index 4011b4cab9d412..cd427a862b71c7 100644
--- a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentication_metric_failure.ts
+++ b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentication_metric_failure.ts
@@ -29,6 +29,7 @@ export const kpiUserAuthenticationsMetricFailureLensAttributes: LensAttributes =
         meta: {
           alias: null,
           disabled: false,
+          // @ts-expect-error upgrade typescript v4.9.5
           indexRefName: 'filter-index-pattern-0',
           key: 'query',
           negate: false,
diff --git a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_area.ts b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_area.ts
index 2cbb7635d04cfe..a7efc44155eec0 100644
--- a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_area.ts
+++ b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_area.ts
@@ -89,6 +89,7 @@ export const kpiUserAuthenticationsAreaLensAttributes: LensAttributes = {
         meta: {
           alias: null,
           disabled: false,
+          // @ts-expect-error upgrade typescript v4.9.5
           indexRefName: 'filter-index-pattern-0',
           key: 'query',
           negate: false,
diff --git a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_bar.ts b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_bar.ts
index a4a1629e360de4..ff6937b1e43e41 100644
--- a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_bar.ts
+++ b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_bar.ts
@@ -84,6 +84,7 @@ export const kpiUserAuthenticationsBarLensAttributes: LensAttributes = {
         meta: {
           alias: null,
           disabled: false,
+          // @ts-expect-error upgrade typescript v4.9.5
           indexRefName: 'filter-index-pattern-0',
           key: 'query',
           negate: false,
diff --git a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_metric_success.ts b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_metric_success.ts
index 58ee89ac81b42f..c386fb71c0a5ce 100644
--- a/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_metric_success.ts
+++ b/x-pack/plugins/security_solution/public/common/components/visualization_actions/lens_attributes/users/kpi_user_authentications_metric_success.ts
@@ -29,6 +29,7 @@ export const kpiUserAuthenticationsMetricSuccessLensAttributes: LensAttributes =
         meta: {
           alias: null,
           disabled: false,
+          // @ts-expect-error upgrade typescript v4.9.5
           indexRefName: 'filter-index-pattern-0',
           key: 'query',
           negate: false,
diff --git a/x-pack/plugins/security_solution/public/common/lib/kibana/hooks.ts b/x-pack/plugins/security_solution/public/common/lib/kibana/hooks.ts
index 714049872ee5d2..1efbec8e5b4a7f 100644
--- a/x-pack/plugins/security_solution/public/common/lib/kibana/hooks.ts
+++ b/x-pack/plugins/security_solution/public/common/lib/kibana/hooks.ts
@@ -71,7 +71,7 @@ export const convertArrayToCamelCase = (arrayOfSnakes: unknown[]): unknown[] =>
   }, []);
 
 export const convertToCamelCase = <T, U extends {}>(snakeCase: T): U =>
-  Object.entries(snakeCase).reduce((acc, [key, value]) => {
+  Object.entries(snakeCase as never).reduce((acc, [key, value]) => {
     if (isArray(value)) {
       set(acc, camelCase(key), convertArrayToCamelCase(value));
     } else if (isObject(value)) {
diff --git a/x-pack/plugins/security_solution/public/detection_engine/rule_creation_ui/components/description_step/index.tsx b/x-pack/plugins/security_solution/public/detection_engine/rule_creation_ui/components/description_step/index.tsx
index ebc25cadfa118c..f6f5957b54e429 100644
--- a/x-pack/plugins/security_solution/public/detection_engine/rule_creation_ui/components/description_step/index.tsx
+++ b/x-pack/plugins/security_solution/public/detection_engine/rule_creation_ui/components/description_step/index.tsx
@@ -76,6 +76,7 @@ interface StepRuleDescriptionProps<T> {
   columns?: 'multi' | 'single' | 'singleSplit';
   data: unknown;
   indexPatterns?: DataViewBase;
+  // @ts-expect-error upgrade typescript v4.9.5
   schema: FormSchema<T>;
 }
 
@@ -153,6 +154,7 @@ export const StepRuleDescription = memo(StepRuleDescriptionComponent);
 
 export const buildListItems = <T,>(
   data: unknown,
+  // @ts-expect-error upgrade typescript v4.9.5
   schema: FormSchema<T>,
   filterManager: FilterManager,
   license: LicenseService,
diff --git a/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/components/actions_log_table.tsx b/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/components/actions_log_table.tsx
index 37b85aa42c918d..03a2485892dac6 100644
--- a/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/components/actions_log_table.tsx
+++ b/x-pack/plugins/security_solution/public/management/components/endpoint_response_actions_list/components/actions_log_table.tsx
@@ -273,6 +273,7 @@ interface ActionsLogTableProps {
   isFlyout: boolean;
   loading: boolean;
   onChange: ({
+    // @ts-expect-error upgrade typescript v4.9.5
     page: _page,
   }: CriteriaWithPagination<ActionListApiResponse['data'][number]>) => void;
   onShowActionDetails: (actionIds: string[]) => void;
diff --git a/x-pack/plugins/security_solution/scripts/endpoint/common/agent_downloads_service.ts b/x-pack/plugins/security_solution/scripts/endpoint/common/agent_downloads_service.ts
index 410ddd65cf8426..5e2e003b6096b8 100644
--- a/x-pack/plugins/security_solution/scripts/endpoint/common/agent_downloads_service.ts
+++ b/x-pack/plugins/security_solution/scripts/endpoint/common/agent_downloads_service.ts
@@ -198,6 +198,7 @@ const handleProcessInterruptions = async <T>(
     throw e;
   }
 
+  // @ts-expect-error upgrade typescript v4.9.5
   if ('finally' in runnerResponse) {
     (runnerResponse as Promise<T>).finally(() => {
       stopListeners();
diff --git a/x-pack/plugins/security_solution/server/endpoint/services/actions/clients/mocks.ts b/x-pack/plugins/security_solution/server/endpoint/services/actions/clients/mocks.ts
index 76c06111e91733..c8e8662887602b 100644
--- a/x-pack/plugins/security_solution/server/endpoint/services/actions/clients/mocks.ts
+++ b/x-pack/plugins/security_solution/server/endpoint/services/actions/clients/mocks.ts
@@ -247,6 +247,7 @@ const createConnectorActionExecuteResponseMock = <TData>(
     status: 'ok',
   };
 
+  // @ts-expect-error upgrade typescript v4.9.5
   return merge(result, overrides);
 };
 
diff --git a/x-pack/plugins/security_solution/server/lib/detection_engine/routes/utils.ts b/x-pack/plugins/security_solution/server/lib/detection_engine/routes/utils.ts
index a200afdd341998..64fa7995182c57 100644
--- a/x-pack/plugins/security_solution/server/lib/detection_engine/routes/utils.ts
+++ b/x-pack/plugins/security_solution/server/lib/detection_engine/routes/utils.ts
@@ -160,10 +160,13 @@ const statusToErrorMessage = (statusCode: number) => {
 export class SiemResponseFactory {
   constructor(private response: KibanaResponseFactory) {}
 
+  // @ts-expect-error upgrade typescript v4.9.5
   error<T>({ statusCode, body, headers }: CustomHttpResponseOptions<T>) {
+    // @ts-expect-error upgrade typescript v4.9.5
     const contentType: CustomHttpResponseOptions<T>['headers'] = {
       'content-type': 'application/json',
     };
+    // @ts-expect-error upgrade typescript v4.9.5
     const defaultedHeaders: CustomHttpResponseOptions<T>['headers'] = {
       ...contentType,
       ...(headers ?? {}),
diff --git a/x-pack/plugins/security_solution/server/lib/detection_engine/rule_management/logic/bulk_actions/utils.ts b/x-pack/plugins/security_solution/server/lib/detection_engine/rule_management/logic/bulk_actions/utils.ts
index d624d9033f2998..42c062aba5d740 100644
--- a/x-pack/plugins/security_solution/server/lib/detection_engine/rule_management/logic/bulk_actions/utils.ts
+++ b/x-pack/plugins/security_solution/server/lib/detection_engine/rule_management/logic/bulk_actions/utils.ts
@@ -18,4 +18,5 @@ export const isIndexPatternsBulkEditAction = (editAction: BulkActionEditType) =>
     BulkActionEditTypeEnum.add_index_patterns,
     BulkActionEditTypeEnum.delete_index_patterns,
     BulkActionEditTypeEnum.set_index_patterns,
+    // @ts-expect-error upgrade typescript v4.9.5
   ].includes(editAction);
diff --git a/x-pack/plugins/security_solution/server/lib/detection_engine/rule_management/logic/bulk_actions/validations.ts b/x-pack/plugins/security_solution/server/lib/detection_engine/rule_management/logic/bulk_actions/validations.ts
index 4a1aef9ed28d75..f387de9e3525ff 100644
--- a/x-pack/plugins/security_solution/server/lib/detection_engine/rule_management/logic/bulk_actions/validations.ts
+++ b/x-pack/plugins/security_solution/server/lib/detection_engine/rule_management/logic/bulk_actions/validations.ts
@@ -101,6 +101,7 @@ export const validateBulkEditRule = async ({
 const istEditApplicableToImmutableRule = (edit: BulkActionEditPayload[]): boolean => {
   return edit.every(({ type }) =>
     [BulkActionEditTypeEnum.set_rule_actions, BulkActionEditTypeEnum.add_rule_actions].includes(
+      // @ts-expect-error upgrade typescript v4.9.5
       type
     )
   );
diff --git a/x-pack/plugins/security_solution/server/lib/risk_score/prebuilt_dev_tool_content/routes/read_prebuilt_dev_tool_content_route.ts b/x-pack/plugins/security_solution/server/lib/risk_score/prebuilt_dev_tool_content/routes/read_prebuilt_dev_tool_content_route.ts
index df819487e13b74..77553eca21d5cd 100644
--- a/x-pack/plugins/security_solution/server/lib/risk_score/prebuilt_dev_tool_content/routes/read_prebuilt_dev_tool_content_route.ts
+++ b/x-pack/plugins/security_solution/server/lib/risk_score/prebuilt_dev_tool_content/routes/read_prebuilt_dev_tool_content_route.ts
@@ -24,10 +24,13 @@ const getReadables = (dataPath: string) => fs.promises.readFile(dataPath, { enco
 class ConsoleResponseFactory {
   constructor(private response: KibanaResponseFactory) {}
 
+  // @ts-expect-error upgrade typescript v4.9.5
   error<T>({ statusCode, body, headers }: CustomHttpResponseOptions<T>) {
+    // @ts-expect-error upgrade typescript v4.9.5
     const contentType: CustomHttpResponseOptions<T>['headers'] = {
       'content-type': 'text/plain; charset=utf-8',
     };
+    // @ts-expect-error upgrade typescript v4.9.5
     const defaultedHeaders: CustomHttpResponseOptions<T>['headers'] = {
       ...contentType,
       ...(headers ?? {}),
@@ -36,6 +39,7 @@ class ConsoleResponseFactory {
     return this.response.custom({
       headers: defaultedHeaders,
       statusCode,
+      // @ts-expect-error upgrade typescript v4.9.5
       body,
     });
   }
diff --git a/x-pack/plugins/stack_connectors/public/connector_types/opsgenie/params.test.tsx b/x-pack/plugins/stack_connectors/public/connector_types/opsgenie/params.test.tsx
index add2016bd97c2e..6b836f22511bc8 100644
--- a/x-pack/plugins/stack_connectors/public/connector_types/opsgenie/params.test.tsx
+++ b/x-pack/plugins/stack_connectors/public/connector_types/opsgenie/params.test.tsx
@@ -218,6 +218,7 @@ describe('OpsgenieParamFields', () => {
     expect(screen.getByDisplayValue('123')).toBeInTheDocument();
 
     rerender(
+      // @ts-expect-error upgrade typescript v4.9.5
       <OpsgenieParamFields
         {...{
           ...defaultCloseAlertProps,
@@ -253,6 +254,7 @@ describe('OpsgenieParamFields', () => {
     expect(screen.getByDisplayValue('456')).toBeInTheDocument();
 
     rerender(
+      // @ts-expect-error upgrade typescript v4.9.5
       <OpsgenieParamFields
         {...{
           ...defaultCreateAlertProps,
@@ -292,6 +294,7 @@ describe('OpsgenieParamFields', () => {
     expect(editAction).toBeCalledTimes(1);
 
     rerender(
+      // @ts-expect-error upgrade typescript v4.9.5
       <OpsgenieParamFields
         {...{
           ...defaultCloseAlertProps,
diff --git a/x-pack/plugins/triggers_actions_ui/public/application/lib/suspended_component_with_props.tsx b/x-pack/plugins/triggers_actions_ui/public/application/lib/suspended_component_with_props.tsx
index c3662f42ae3961..bfd4a6562fcd7b 100644
--- a/x-pack/plugins/triggers_actions_ui/public/application/lib/suspended_component_with_props.tsx
+++ b/x-pack/plugins/triggers_actions_ui/public/application/lib/suspended_component_with_props.tsx
@@ -15,6 +15,7 @@ export function suspendedComponentWithProps<T = unknown>(
 ) {
   return (props: T) => (
     <Suspense fallback={<CenterJustifiedSpinner size={size ?? 'm'} />}>
+      {/* @ts-expect-error upgrade typescript v4.9.5*/}
       <ComponentToSuspend {...props} />
     </Suspense>
   );
diff --git a/x-pack/plugins/triggers_actions_ui/public/application/sections/action_connector_form/action_alerts_filter_timeframe.test.tsx b/x-pack/plugins/triggers_actions_ui/public/application/sections/action_connector_form/action_alerts_filter_timeframe.test.tsx
index ef73b3ab305c05..ea666d1f2dd3e1 100644
--- a/x-pack/plugins/triggers_actions_ui/public/application/sections/action_connector_form/action_alerts_filter_timeframe.test.tsx
+++ b/x-pack/plugins/triggers_actions_ui/public/application/sections/action_connector_form/action_alerts_filter_timeframe.test.tsx
@@ -107,6 +107,7 @@ describe('action_alerts_filter_timeframe', () => {
     );
     expect(alertsFilterTimeframeStart.exists()).toBeTruthy();
     {
+      // @ts-expect-error upgrade typescript v4.9.5
       const selectedDate: Moment = Reflect.get(
         alertsFilterTimeframeStart.first().props(),
         'selected'
@@ -117,6 +118,7 @@ describe('action_alerts_filter_timeframe', () => {
     const alertsFilterTimeframeEnd = wrapper.find('[data-test-subj="alertsFilterTimeframeEnd"]');
     expect(alertsFilterTimeframeEnd.exists()).toBeTruthy();
     {
+      // @ts-expect-error upgrade typescript v4.9.5
       const selectedDate: Moment = Reflect.get(
         alertsFilterTimeframeEnd.first().props(),
         'selected'
diff --git a/x-pack/plugins/triggers_actions_ui/public/application/sections/rule_form/rule_conditions.tsx b/x-pack/plugins/triggers_actions_ui/public/application/sections/rule_form/rule_conditions.tsx
index 2885d340134026..5828210d32598a 100644
--- a/x-pack/plugins/triggers_actions_ui/public/application/sections/rule_form/rule_conditions.tsx
+++ b/x-pack/plugins/triggers_actions_ui/public/application/sections/rule_form/rule_conditions.tsx
@@ -89,6 +89,7 @@ export const RuleConditions = <ConditionProps extends any, ActionGroupIds extend
                   React.Children.only(children),
                   onResetConditionsFor
                     ? {
+                        // @ts-expect-error upgrade typescript v4.9.5
                         actionGroup,
                         onResetConditionsFor,
                       }
diff --git a/x-pack/plugins/triggers_actions_ui/public/application/sections/rule_form/rule_conditions_group.tsx b/x-pack/plugins/triggers_actions_ui/public/application/sections/rule_form/rule_conditions_group.tsx
index 0b2d4d5fd26ced..35f56410269a8f 100644
--- a/x-pack/plugins/triggers_actions_ui/public/application/sections/rule_form/rule_conditions_group.tsx
+++ b/x-pack/plugins/triggers_actions_ui/public/application/sections/rule_form/rule_conditions_group.tsx
@@ -51,6 +51,7 @@ export const RuleConditionsGroup = <ConditionProps extends unknown>({
     >
       {React.isValidElement(children) ? (
         React.cloneElement(React.Children.only(children), {
+          // @ts-expect-error upgrade typescript v4.9.5
           actionGroup,
           ...otherProps,
         })
diff --git a/yarn.lock b/yarn.lock
index 709e1227bea944..7b02e6dc6c52ed 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -30080,10 +30080,10 @@ typescript-tuple@^2.2.1:
   dependencies:
     typescript-compare "^0.0.2"
 
-typescript@4.7.4, typescript@^3.3.3333, typescript@^4.6.3, typescript@^5.0.4:
-  version "4.7.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.7.4.tgz#1a88596d1cf47d59507a1bcdfb5b9dfe4d488235"
-  integrity sha512-C0WQT0gezHuw6AdY1M2jxUO83Rjf0HP7Sk1DtXj6j1EwkQNZrHAg2XPWlq62oqEhYvONq5pkC2Y9oPljWToLmQ==
+typescript@4.9.5, typescript@^3.3.3333, typescript@^4.6.3, typescript@^5.0.4:
+  version "4.9.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.9.5.tgz#095979f9bcc0d09da324d58d03ce8f8374cbe65a"
+  integrity sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==
 
 typewise-core@^1.2, typewise-core@^1.2.0:
   version "1.2.0"