diff --git a/.gitignore b/.gitignore
index ad1457036..b6e79ca14 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,3 +50,6 @@ terraform.tfstate*
 # nextjs
 static-site/next-env.d.ts
 static-site/.next
+
+# TypeScript
+static-site/tsconfig.tsbuildinfo
diff --git a/static-site/tsconfig.json b/static-site/tsconfig.json
index 4e224ad41..62fe985f5 100644
--- a/static-site/tsconfig.json
+++ b/static-site/tsconfig.json
@@ -1,27 +1,64 @@
+/*
+This TSConfig file aims to keep as much as possible in sync with the same file
+in Auspice¹.
+
+It can't be 100% the same because Next.js requires some configuration options to
+be set and will rewrite this file if they aren't set.²
+
+¹ <https://github.com/nextstrain/auspice/blob/-/tsconfig.json>
+² https://github.com/vercel/next.js/discussions/39942
+*/
+
 {
   "compilerOptions": {
+
+    /* Modules */
+    "moduleResolution": "node",                          /* Specify how TypeScript looks up a file from a given module specifier. */
+    "types": ["node"],                                   /* Specify type package names to be included without being referenced in a source file. */
+
+    /* JavaScript Support */
+    "allowJs": true,                                     /* Allow JavaScript files to be a part of your program. This allows TS files to import from JS files. */
+
+    /* Emit */
+    "noEmit": true,                                      /* Do not emit compiler output files like JavaScript source code, source-maps or declarations. */
+
+    /* Interop Constraints */
+    "isolatedModules": true,                             /* Ensure that each file can be safely transpiled without relying on other imports. */
+    "allowSyntheticDefaultImports": true,                /* Allow 'import x from y' when a module doesn't have a default export. */
+    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */
+
+    /* Type Checking */
+    "strict": true,                                      /* Enable all strict type-checking options. */
+    "noImplicitAny": false,                              /* Allow implicit any to make incremental TypeScript adoption easier. */
+    "noUnusedLocals": true,                              /* Enable error reporting when a local variables aren't read. */
+    "noUnusedParameters": true,                          /* Raise an error when a function parameter isn't read */
+    "noImplicitReturns": true,                           /* Enable error reporting for codepaths that do not explicitly return in a function. */
+    "noFallthroughCasesInSwitch": true,                  /* Enable error reporting for fallthrough cases in switch statements. */
+    "noUncheckedIndexedAccess": true,                    /* Include 'undefined' in index signature results */
+    "noImplicitOverride": true,                          /* Ensure overriding members in derived classes are marked with an override modifier. */
+    "allowUnusedLabels": false,                          /* Enable error reporting for unused labels. */
+    "allowUnreachableCode": false,                       /* Enable error reporting for unreachable code. */
+
+    /* Completeness */
+    "skipDefaultLibCheck": true,                         /* Skip type checking .d.ts files that are included with TypeScript. */
+    "skipLibCheck": true,                                /* Skip type checking all .d.ts files. */
+ 
+    /* Other options required by Next.js */
+    "jsx": "preserve",
     "lib": [
       "dom",
       "dom.iterable",
       "esnext"
     ],
-    "allowJs": true,
-    "skipLibCheck": true,
-    "strict": false,
-    "forceConsistentCasingInFileNames": true,
-    "noEmit": true,
     "incremental": true,
     "esModuleInterop": true,
     "module": "esnext",
-    "moduleResolution": "node",
     "resolveJsonModule": true,
-    "isolatedModules": true,
-    "jsx": "preserve"
   },
   "include": [
     "next-env.d.ts",
-    "**/*.ts",
-    "**/*.tsx"
+    "pages/**/*",
+    "src/**/*",
   ],
   "exclude": [
     "node_modules"