diff --git a/src/migration/ember-app/index.ts b/src/migration/ember-app/index.ts
index 3239e56..7dabc66 100644
--- a/src/migration/ember-app/index.ts
+++ b/src/migration/ember-app/index.ts
@@ -1,9 +1,9 @@
 import type { CodemodOptions } from '../../types/index.js';
 import { createOptions } from '../../utils/steps/create-options.js';
-import { updateClasses } from '../../utils/steps/update-classes.js';
+import { updateProject } from '../../utils/steps/update-project.js';
 
 export function migrateEmberApp(codemodOptions: CodemodOptions): void {
   const options = createOptions(codemodOptions);
 
-  updateClasses(['app/**/*.{js,ts}'], options);
+  updateProject(['app/**/*.{js,ts}'], options);
 }
diff --git a/src/migration/ember-v1-addon/index.ts b/src/migration/ember-v1-addon/index.ts
index 262c9dd..36ce412 100644
--- a/src/migration/ember-v1-addon/index.ts
+++ b/src/migration/ember-v1-addon/index.ts
@@ -1,11 +1,11 @@
 import type { CodemodOptions } from '../../types/index.js';
 import { createOptions } from '../../utils/steps/create-options.js';
-import { updateClasses } from '../../utils/steps/update-classes.js';
+import { updateProject } from '../../utils/steps/update-project.js';
 
 export function migrateEmberV1Addon(codemodOptions: CodemodOptions): void {
   const options = createOptions(codemodOptions);
 
-  updateClasses(
+  updateProject(
     ['addon/**/*.{js,ts}', 'tests/dummy/app/**/*.{js,ts}'],
     options,
   );
diff --git a/src/migration/ember-v2-addon/index.ts b/src/migration/ember-v2-addon/index.ts
index 30a390f..b23be1d 100644
--- a/src/migration/ember-v2-addon/index.ts
+++ b/src/migration/ember-v2-addon/index.ts
@@ -1,9 +1,9 @@
 import type { CodemodOptions } from '../../types/index.js';
 import { createOptions } from '../../utils/steps/create-options.js';
-import { updateClasses } from '../../utils/steps/update-classes.js';
+import { updateProject } from '../../utils/steps/update-project.js';
 
 export function migrateEmberV2Addon(codemodOptions: CodemodOptions): void {
   const options = createOptions(codemodOptions);
 
-  updateClasses(['src/**/*.{js,ts}'], options);
+  updateProject(['src/**/*.{js,ts}'], options);
 }
diff --git a/src/utils/steps/update-classes/find-local-name.ts b/src/utils/steps/update-classes/find-local-name.ts
deleted file mode 100644
index eedf95f..0000000
--- a/src/utils/steps/update-classes/find-local-name.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import { AST } from '@codemod-utils/ast-javascript';
-
-type Data = {
-  isTypeScript: boolean;
-};
-
-export function findLocalName(file: string, data: Data): string | undefined {
-  let localName: string | undefined;
-
-  const traverse = AST.traverse(data.isTypeScript);
-
-  traverse(file, {
-    // ...
-  });
-
-  return localName;
-}
diff --git a/src/utils/steps/update-classes/rename-imports.ts b/src/utils/steps/update-classes/rename-imports.ts
deleted file mode 100644
index 15bc00a..0000000
--- a/src/utils/steps/update-classes/rename-imports.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { AST } from '@codemod-utils/ast-javascript';
-
-type Data = {
-  isTypeScript: boolean;
-  localName: string;
-};
-
-export function renameImports(file: string, data: Data): string {
-  const traverse = AST.traverse(data.isTypeScript);
-
-  const ast = traverse(file, {
-    // ...
-  });
-
-  return AST.print(ast);
-}
diff --git a/src/utils/steps/update-classes.ts b/src/utils/steps/update-project.ts
similarity index 55%
rename from src/utils/steps/update-classes.ts
rename to src/utils/steps/update-project.ts
index 4316dcd..fda7c99 100644
--- a/src/utils/steps/update-classes.ts
+++ b/src/utils/steps/update-project.ts
@@ -4,10 +4,9 @@ import { join } from 'node:path';
 import { findFiles } from '@codemod-utils/files';
 
 import { Options } from '../../types/index.js';
-import { findLocalName } from './update-classes/find-local-name.js';
-import { renameImports } from './update-classes/rename-imports.js';
+import { updateClass } from './update-project/update-class.js';
 
-export function updateClasses(src: string[], options: Options): void {
+export function updateProject(src: string[], options: Options): void {
   const { projectRoot } = options;
 
   const filePaths = findFiles(src, {
@@ -20,18 +19,7 @@ export function updateClasses(src: string[], options: Options): void {
 
     const isTypeScript = filePath.endsWith('.ts');
 
-    const localName = findLocalName(oldFile, {
-      isTypeScript,
-    });
-
-    if (localName === undefined) {
-      return;
-    }
-
-    const newFile = renameImports(oldFile, {
-      isTypeScript,
-      localName,
-    });
+    const newFile = updateClass(oldFile, isTypeScript);
 
     writeFileSync(oldPath, newFile, 'utf8');
   });
diff --git a/src/utils/steps/update-project/update-class.ts b/src/utils/steps/update-project/update-class.ts
new file mode 100644
index 0000000..df46261
--- /dev/null
+++ b/src/utils/steps/update-project/update-class.ts
@@ -0,0 +1,157 @@
+import { AST } from '@codemod-utils/ast-javascript';
+
+function isValueImport(
+  importKind: 'type' | 'typeof' | 'value' | undefined,
+): boolean {
+  return importKind === undefined || importKind === 'value';
+}
+
+function updateImportStatement(
+  file: string,
+  data: {
+    isTypeScript: boolean;
+  },
+): {
+  localName: string | undefined;
+  newFile: string;
+} {
+  let localName: string | undefined;
+
+  const traverse = AST.traverse(data.isTypeScript);
+
+  const ast = traverse(file, {
+    visitImportDeclaration(path) {
+      const { importKind, source, specifiers } = path.node;
+
+      if (!isValueImport(importKind)) {
+        return false;
+      }
+
+      if (source.type !== 'Literal' && source.type !== 'StringLiteral') {
+        return false;
+      }
+
+      if (source.value !== '@ember/service' || !Array.isArray(specifiers)) {
+        return false;
+      }
+
+      path.node.specifiers = specifiers.map((specifier) => {
+        // @ts-expect-error: 'specifier.importKind' exists
+        if (!isValueImport(specifier.importKind)) {
+          return specifier;
+        }
+
+        if (specifier.type !== 'ImportSpecifier') {
+          return specifier;
+        }
+
+        if (
+          specifier.imported.name !== 'inject' &&
+          specifier.imported.name !== 'service'
+        ) {
+          return specifier;
+        }
+
+        localName = specifier.local!.name as string;
+
+        return AST.builders.importSpecifier(AST.builders.identifier('service'));
+      });
+
+      return false;
+    },
+  });
+
+  return {
+    localName,
+    newFile: AST.print(ast),
+  };
+}
+
+function updateServiceDecorators(
+  file: string,
+  data: {
+    isTypeScript: boolean;
+    localName: string;
+  },
+): string {
+  const traverse = AST.traverse(data.isTypeScript);
+
+  const ast = traverse(file, {
+    visitCallExpression(node) {
+      this.traverse(node);
+
+      switch (node.value.callee.type) {
+        case 'Identifier': {
+          if (node.value.callee.name === data.localName) {
+            node.value.callee.name = 'service';
+          }
+
+          break;
+        }
+      }
+
+      return false;
+    },
+
+    visitClassProperty(node) {
+      if (
+        !Array.isArray(node.value.decorators) ||
+        node.value.decorators.length !== 1
+      ) {
+        return false;
+      }
+
+      const decorator = node.value.decorators[0];
+      let isMatch = false;
+
+      switch (decorator.expression.type) {
+        case 'CallExpression': {
+          if (decorator.expression.callee.name === data.localName) {
+            decorator.expression.callee.name = 'service';
+            isMatch = true;
+          }
+
+          break;
+        }
+
+        case 'Identifier': {
+          if (decorator.expression.name === data.localName) {
+            decorator.expression.name = 'service';
+            isMatch = true;
+          }
+
+          break;
+        }
+      }
+
+      if (isMatch && data.isTypeScript) {
+        node.value.accessibility = null;
+        node.value.declare = true;
+        node.value.definite = null;
+        node.value.readonly = null;
+      }
+
+      return false;
+    },
+  });
+
+  return AST.print(ast);
+}
+
+export function updateClass(file: string, isTypeScript: boolean): string {
+  // eslint-disable-next-line prefer-const
+  let { localName, newFile } = updateImportStatement(file, {
+    isTypeScript,
+  });
+
+  if (!localName) {
+    return file;
+  }
+
+  newFile = updateServiceDecorators(newFile, {
+    isTypeScript,
+    localName,
+  });
+
+  return newFile;
+}