diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 000000000000000..2e7aed6303240db
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,30 @@
+* text=auto
+* text eol=lf
+
+# (binary is a macro for -text -diff)
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.avif binary
+*.webp binary
+*.jxl binary
+*.ico binary
+*.mov binary
+*.mp4 binary
+*.mp3 binary
+*.flv binary
+*.fla binary
+*.swf binary
+*.gz binary
+*.zip binary
+*.7z binary
+*.ttf binary
+*.eot binary
+*.woff binary
+*.woff2 binary
+*.pyc binary
+*.pdf binary
+*.ez binary
+*.bz2 binary
+*.swp binary
\ No newline at end of file
diff --git a/content/r2/api/s3/presigned-urls.md b/content/r2/api/s3/presigned-urls.md
index 4842bad416b7561..16b93fa56874338 100644
--- a/content/r2/api/s3/presigned-urls.md
+++ b/content/r2/api/s3/presigned-urls.md
@@ -87,7 +87,7 @@ const r2 = new AwsClient({
 });
 
 export default {
-  async fetch(req: Request) {
+  async fetch(req: Request): Promise<Response> {
     // This is just an example to demonstrating using aws4fetch to generate a presigned URL.
     // This Worker should not be used as-is as it does not authenticate the request, meaning
     // that anyone can upload to your bucket.
diff --git a/content/workers/examples/103-early-hints.md b/content/workers/examples/103-early-hints.md
index 2cb1852b335e1b7..e4f9359bb6788e7 100644
--- a/content/workers/examples/103-early-hints.md
+++ b/content/workers/examples/103-early-hints.md
@@ -87,7 +87,7 @@ const HTML = `
 `;
 
 export default {
-  async fetch(req: Request) {
+  async fetch(req: Request): Promise<Response> {
     // If request is for test.css, serve the raw CSS
     if (/test\.css$/.test(req.url)) {
       return new Response(CSS, {
diff --git a/content/workers/examples/ab-testing.md b/content/workers/examples/ab-testing.md
index 3b3af2e02014b68..c9ad493d7262a1f 100644
--- a/content/workers/examples/ab-testing.md
+++ b/content/workers/examples/ab-testing.md
@@ -59,7 +59,7 @@ export default {
 const NAME = "myExampleWorkersABTest";
 
 export default {
-  async fetch(req: Request) {
+  async fetch(req: Request): Promise<Response> {
     const url = new URL(req.url);
     // Enable Passthrough to allow direct access to control and test routes.
     if (url.pathname.startsWith("/control") || url.pathname.startsWith("/test"))
diff --git a/content/workers/examples/accessing-the-cloudflare-object.md b/content/workers/examples/accessing-the-cloudflare-object.md
index 414d960c3b634e2..8c12a573b8c24a2 100644
--- a/content/workers/examples/accessing-the-cloudflare-object.md
+++ b/content/workers/examples/accessing-the-cloudflare-object.md
@@ -39,7 +39,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(req: Request) {
+  async fetch(req: Request): Promise<Response> {
     const data =
       req.cf !== undefined
         ? req.cf
diff --git a/content/workers/examples/aggregate-requests.md b/content/workers/examples/aggregate-requests.md
index 624e260523407a9..79507f0232d91ec 100644
--- a/content/workers/examples/aggregate-requests.md
+++ b/content/workers/examples/aggregate-requests.md
@@ -66,7 +66,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * someHost is set up to return JSON responses
      * Replace url1 and url2 with the hosts you wish to send requests to
diff --git a/content/workers/examples/alter-headers.md b/content/workers/examples/alter-headers.md
index 73fac091c099ab5..70ec9f05d8e4851 100644
--- a/content/workers/examples/alter-headers.md
+++ b/content/workers/examples/alter-headers.md
@@ -48,7 +48,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const response = await fetch(request);
 
     // Clone the response so that it's no longer immutable
diff --git a/content/workers/examples/auth-with-headers.md b/content/workers/examples/auth-with-headers.md
index 00a2e9fa49715a9..0699de2f999044c 100644
--- a/content/workers/examples/auth-with-headers.md
+++ b/content/workers/examples/auth-with-headers.md
@@ -51,7 +51,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * @param {string} PRESHARED_AUTH_HEADER_KEY Custom header to check for key
      * @param {string} PRESHARED_AUTH_HEADER_VALUE Hard coded key value
diff --git a/content/workers/examples/basic-auth.md b/content/workers/examples/basic-auth.md
index d401d1dd371184c..a366d820681acee 100644
--- a/content/workers/examples/basic-auth.md
+++ b/content/workers/examples/basic-auth.md
@@ -177,7 +177,7 @@ function timingSafeEqual(a: string, b: string) {
 }
 
 export default {
-  async fetch(request: Request, env: { PASSWORD: string }) {
+  async fetch(request: Request, env: { PASSWORD: string }): Promise<Response> {
     const BASIC_USER = "admin";
 
     // You will need an admin password. This should be
diff --git a/content/workers/examples/block-on-tls.md b/content/workers/examples/block-on-tls.md
index e6879165d66e2eb..c0d450b01814f66 100644
--- a/content/workers/examples/block-on-tls.md
+++ b/content/workers/examples/block-on-tls.md
@@ -42,7 +42,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     try {
       const tlsVersion = request.cf.tlsVersion;
       // Allow only TLS versions 1.2 and 1.3
diff --git a/content/workers/examples/bulk-origin-proxy.md b/content/workers/examples/bulk-origin-proxy.md
index 7d9c04157ff6061..db00603f260e504 100644
--- a/content/workers/examples/bulk-origin-proxy.md
+++ b/content/workers/examples/bulk-origin-proxy.md
@@ -44,7 +44,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * An object with different URLs to fetch
      * @param {Object} ORIGINS
diff --git a/content/workers/examples/bulk-redirects.md b/content/workers/examples/bulk-redirects.md
index b1967205547a905..7d4a78e7678ffe6 100644
--- a/content/workers/examples/bulk-redirects.md
+++ b/content/workers/examples/bulk-redirects.md
@@ -43,7 +43,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const externalHostname = "examples.cloudflareworkers.com";
 
     const redirectMap = new Map([
diff --git a/content/workers/examples/cache-api.md b/content/workers/examples/cache-api.md
index 9888195dd2d4374..b5b5dae1ca95fbd 100644
--- a/content/workers/examples/cache-api.md
+++ b/content/workers/examples/cache-api.md
@@ -57,7 +57,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request, env: unknown, ctx: ExecutionContext) {
+  async fetch(request: Request, env: unknown, ctx: ExecutionContext): Promise<Response> {
     const cacheUrl = new URL(request.url);
 
     // Construct the cache key from the cache URL
diff --git a/content/workers/examples/cache-post-request.md b/content/workers/examples/cache-post-request.md
index d1552e947ed48e1..3682de2de1c057e 100644
--- a/content/workers/examples/cache-post-request.md
+++ b/content/workers/examples/cache-post-request.md
@@ -64,7 +64,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request, env: unknown, ctx: ExecutionContext) {
+  async fetch(request: Request, env: unknown, ctx: ExecutionContext): Promise<Response> {
     async function sha256(message) {
       // encode as UTF-8
       const msgBuffer = await new TextEncoder().encode(message);
diff --git a/content/workers/examples/cache-tags.md b/content/workers/examples/cache-tags.md
index a7ee5613d19e278..ebef0ef38b82b8d 100644
--- a/content/workers/examples/cache-tags.md
+++ b/content/workers/examples/cache-tags.md
@@ -60,7 +60,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const requestUrl = new URL(request.url);
     const params = requestUrl.searchParams;
     const tags =
diff --git a/content/workers/examples/cache-using-fetch.md b/content/workers/examples/cache-using-fetch.md
index c4937d06ff902f4..c7d5e523793fd39 100644
--- a/content/workers/examples/cache-using-fetch.md
+++ b/content/workers/examples/cache-using-fetch.md
@@ -130,7 +130,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     let url = new URL(request.url);
 
     if (Math.random() < 0.5) {
diff --git a/content/workers/examples/conditional-response.md b/content/workers/examples/conditional-response.md
index 98d0e6b04c13967..c8ed64d262eea04 100644
--- a/content/workers/examples/conditional-response.md
+++ b/content/workers/examples/conditional-response.md
@@ -65,7 +65,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const BLOCKED_HOSTNAMES = ["nope.mywebsite.com", "bye.website.com"];
     // Return a new Response based on a URL's hostname
     const url = new URL(request.url);
diff --git a/content/workers/examples/cors-header-proxy.md b/content/workers/examples/cors-header-proxy.md
index b18f70b94c87791..726167a3368ae9f 100644
--- a/content/workers/examples/cors-header-proxy.md
+++ b/content/workers/examples/cors-header-proxy.md
@@ -171,7 +171,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const corsHeaders = {
       "Access-Control-Allow-Origin": "*",
       "Access-Control-Allow-Methods": "GET,HEAD,POST,OPTIONS",
diff --git a/content/workers/examples/country-code-redirect.md b/content/workers/examples/country-code-redirect.md
index 7cf0d1373b11dd7..46473664422b32d 100644
--- a/content/workers/examples/country-code-redirect.md
+++ b/content/workers/examples/country-code-redirect.md
@@ -48,7 +48,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * A map of the URLs to redirect to
      * @param {Object} countryMap
diff --git a/content/workers/examples/data-loss-prevention.md b/content/workers/examples/data-loss-prevention.md
index 8a09d1f6fd98b9e..b2688bdebd87ed0 100644
--- a/content/workers/examples/data-loss-prevention.md
+++ b/content/workers/examples/data-loss-prevention.md
@@ -89,7 +89,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const DEBUG = true;
     const SOME_HOOK_SERVER = "https://webhook.flow-wolf.io/hook";
 
diff --git a/content/workers/examples/debugging-logs.md b/content/workers/examples/debugging-logs.md
index a31ebc11c1a6fd8..7b2fdee267538e7 100644
--- a/content/workers/examples/debugging-logs.md
+++ b/content/workers/examples/debugging-logs.md
@@ -61,7 +61,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request, env: unknown, ctx: ExecutionContext) {
+  async fetch(request: Request, env: unknown, ctx: ExecutionContext): Promise<Response> {
     // Service configured to receive logs
     const LOG_URL = "https://log-service.example.com/";
 
diff --git a/content/workers/examples/extract-cookie-value.md b/content/workers/examples/extract-cookie-value.md
index 120947c8b84f844..8d3dd25d71d1c8e 100644
--- a/content/workers/examples/extract-cookie-value.md
+++ b/content/workers/examples/extract-cookie-value.md
@@ -35,7 +35,7 @@ export default {
 ```ts
 import { parse } from "cookie";
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     // The name of the cookie
     const COOKIE_NAME = "__uid";
     const cookie = parse(request.headers.get("Cookie") || "");
diff --git a/content/workers/examples/fetch-html.md b/content/workers/examples/fetch-html.md
index 17a804ae3ac4274..8c411ed356e7957 100644
--- a/content/workers/examples/fetch-html.md
+++ b/content/workers/examples/fetch-html.md
@@ -21,7 +21,7 @@ updated: 2024-01-11
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * Replace `remote` with the host you wish to send requests to
      */
diff --git a/content/workers/examples/fetch-json.md b/content/workers/examples/fetch-json.md
index acec926b0b76b37..12ce5a954504c8c 100644
--- a/content/workers/examples/fetch-json.md
+++ b/content/workers/examples/fetch-json.md
@@ -57,7 +57,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request, env: unknown, ctx: ExecutionContext) {
+  async fetch(request: Request, env: unknown, ctx: ExecutionContext): Promise<Response> {
     /**
      * Example someHost is set up to take in a JSON request
      * Replace url with the host you wish to send requests to
diff --git a/content/workers/examples/geolocation-app-weather.md b/content/workers/examples/geolocation-app-weather.md
index db59fc9f2633c8f..80ca2b2c61bb7b5 100644
--- a/content/workers/examples/geolocation-app-weather.md
+++ b/content/workers/examples/geolocation-app-weather.md
@@ -68,7 +68,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     let endpoint = "https://api.waqi.info/feed/geo:";
     const token = ""; //Use a token from https://aqicn.org/api/
     let html_style = `body{padding:6em; font-family: sans-serif;} h1{color:#f6821f}`;
diff --git a/content/workers/examples/geolocation-custom-styling.md b/content/workers/examples/geolocation-custom-styling.md
index a24b87242c45019..6de3808b7254207 100644
--- a/content/workers/examples/geolocation-custom-styling.md
+++ b/content/workers/examples/geolocation-custom-styling.md
@@ -186,7 +186,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     let grads = [
       [
         { color: "00000c", position: 0 },
diff --git a/content/workers/examples/geolocation-hello-world.md b/content/workers/examples/geolocation-hello-world.md
index 0a8485f837eadce..2b01218045f5949 100644
--- a/content/workers/examples/geolocation-hello-world.md
+++ b/content/workers/examples/geolocation-hello-world.md
@@ -60,7 +60,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     let html_content = "";
     let html_style =
       "body{padding:6em; font-family: sans-serif;} h1{color:#f6821f;}";
diff --git a/content/workers/examples/hot-link-protection.md b/content/workers/examples/hot-link-protection.md
index 8f7ee843c64e2b2..d3816fc11978d48 100644
--- a/content/workers/examples/hot-link-protection.md
+++ b/content/workers/examples/hot-link-protection.md
@@ -47,7 +47,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const HOMEPAGE_URL = "https://tutorial.cloudflareworkers.com/";
     const PROTECTED_TYPE = "image/";
 
diff --git a/content/workers/examples/images-workers.md b/content/workers/examples/images-workers.md
index 1948af73bdf3d9f..63cc9242c2c9436 100644
--- a/content/workers/examples/images-workers.md
+++ b/content/workers/examples/images-workers.md
@@ -41,7 +41,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     // You can find this in the dashboard, it should look something like this: ZWd9g1K7eljCn_KDTu_MWA
     const accountHash = "";
 
diff --git a/content/workers/examples/logging-headers.md b/content/workers/examples/logging-headers.md
index 1eca4a76127a2a7..14ab46534da2172 100644
--- a/content/workers/examples/logging-headers.md
+++ b/content/workers/examples/logging-headers.md
@@ -29,7 +29,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     console.log(new Map(request.headers));
     return new Response("Hello world");
   },
diff --git a/content/workers/examples/modify-request-property.md b/content/workers/examples/modify-request-property.md
index ce30346205e3aff..26287145b5f90bd 100644
--- a/content/workers/examples/modify-request-property.md
+++ b/content/workers/examples/modify-request-property.md
@@ -76,7 +76,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * Example someHost is set up to return raw JSON
      * @param {string} someUrl the URL to send the request to, since we are setting hostname too only path is applied
diff --git a/content/workers/examples/modify-response.md b/content/workers/examples/modify-response.md
index 082778eba361cde..c525bf42baf9f14 100644
--- a/content/workers/examples/modify-response.md
+++ b/content/workers/examples/modify-response.md
@@ -67,7 +67,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * @param {string} headerNameSrc Header to get the new value from
      * @param {string} headerNameDst Header to set based off of value in src
diff --git a/content/workers/examples/post-json.md b/content/workers/examples/post-json.md
index 67879089d39f1a9..8b3ad7a329d61d9 100644
--- a/content/workers/examples/post-json.md
+++ b/content/workers/examples/post-json.md
@@ -67,7 +67,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * Example someHost is set up to take in a JSON request
      * Replace url with the host you wish to send requests to
diff --git a/content/workers/examples/read-post.md b/content/workers/examples/read-post.md
index fd11c59ff335387..d334d5543c5a47e 100644
--- a/content/workers/examples/read-post.md
+++ b/content/workers/examples/read-post.md
@@ -77,7 +77,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     /**
      * rawHtmlResponse returns HTML inputted directly
      * into the worker script
diff --git a/content/workers/examples/redirect.md b/content/workers/examples/redirect.md
index fa121ea97448e96..e9e26e55495b37b 100644
--- a/content/workers/examples/redirect.md
+++ b/content/workers/examples/redirect.md
@@ -60,7 +60,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const base = "https://example.com";
     const statusCode = 301;
 
diff --git a/content/workers/examples/respond-with-another-site.md b/content/workers/examples/respond-with-another-site.md
index 8187e0d91fa2fda..fe27749c9c37c21 100644
--- a/content/workers/examples/respond-with-another-site.md
+++ b/content/workers/examples/respond-with-another-site.md
@@ -21,7 +21,7 @@ layout: example
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     async function MethodNotAllowed(request) {
       return new Response(`Method ${request.method} not allowed.`, {
         status: 405,
diff --git a/content/workers/examples/return-html.md b/content/workers/examples/return-html.md
index ac4e89900514dc7..1f3d8720946d2f7 100644
--- a/content/workers/examples/return-html.md
+++ b/content/workers/examples/return-html.md
@@ -21,7 +21,7 @@ updated: 2024-01-11
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const html = `<!DOCTYPE html>
 		<body>
 		  <h1>Hello World</h1>
diff --git a/content/workers/examples/return-json.md b/content/workers/examples/return-json.md
index 39591e55912fc4b..62e3bc76fa977d3 100644
--- a/content/workers/examples/return-json.md
+++ b/content/workers/examples/return-json.md
@@ -23,7 +23,7 @@ updated: 2024-01-11
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const data = {
       hello: "world",
     };
diff --git a/content/workers/examples/rewrite-links.md b/content/workers/examples/rewrite-links.md
index 1d9c58906654974..47e8e6badaed6ee 100644
--- a/content/workers/examples/rewrite-links.md
+++ b/content/workers/examples/rewrite-links.md
@@ -57,7 +57,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const OLD_URL = "developer.mozilla.org";
     const NEW_URL = "mynewdomain.com";
 
diff --git a/content/workers/examples/security-headers.md b/content/workers/examples/security-headers.md
index 34fddad4affca54..0196a98eac1426e 100644
--- a/content/workers/examples/security-headers.md
+++ b/content/workers/examples/security-headers.md
@@ -106,7 +106,7 @@ export default {
 
 ```ts
 export default {
-  async fetch(request: Request) {
+  async fetch(request: Request): Promise<Response> {
     const DEFAULT_SECURITY_HEADERS = {
       /*
     Secure your application with Content-Security-Policy headers.
diff --git a/content/workers/examples/signing-requests.md b/content/workers/examples/signing-requests.md
index 9588eb4c8b99aaf..f4ea5a7e7bdc7c9 100644
--- a/content/workers/examples/signing-requests.md
+++ b/content/workers/examples/signing-requests.md
@@ -148,7 +148,7 @@ const encoder = new TextEncoder();
 const EXPIRY = 60;
 
 export default {
-  async fetch(request: Request, env: { SECRET_DATA: string }) {
+  async fetch(request: Request, env: { SECRET_DATA: string }): Promise<Response> {
     // You will need some secret data to use as a symmetric key. This should be
     // attached to your Worker as an encrypted secret.
     // Refer to https://developers.cloudflare.com/workers/configuration/secrets/
diff --git a/content/workers/examples/turnstile-html-rewriter.md b/content/workers/examples/turnstile-html-rewriter.md
index 71aa8ecef65d49b..0a9c5b246a050ea 100644
--- a/content/workers/examples/turnstile-html-rewriter.md
+++ b/content/workers/examples/turnstile-html-rewriter.md
@@ -49,7 +49,7 @@ export default {
 
 ```ts
 export default {
-	async fetch(request: Request, env: Env) {
+	async fetch(request: Request, env: Env): Promise<Response> {
 		const SITE_KEY = env.SITE_KEY
 		let res = await fetch(request)
 
diff --git a/content/workers/runtime-apis/rpc/typescript.md b/content/workers/runtime-apis/rpc/typescript.md
index 17856f114ba4f12..6740d7590b1010c 100644
--- a/content/workers/runtime-apis/rpc/typescript.md
+++ b/content/workers/runtime-apis/rpc/typescript.md
@@ -22,7 +22,7 @@ interface Env {
 }
 
 export default {
-  async fetch(req: Request, env: Env, ctx: ExecutionContext) {
+  async fetch(req: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
     const result = await env.SUM_SERVICE.sum(1, 2);
     return new Response(result.toString());
   }
diff --git a/content/workers/runtime-apis/web-crypto.md b/content/workers/runtime-apis/web-crypto.md
index be85005819335b1..f9e8bfa788528a1 100644
--- a/content/workers/runtime-apis/web-crypto.md
+++ b/content/workers/runtime-apis/web-crypto.md
@@ -89,7 +89,7 @@ export default {
 {{<tab label="ts">}}
 ```ts
 export default {
-  async fetch(req: Request) {
+  async fetch(req: Request): Promise<Response> {
     // Fetch from origin
     const res = await fetch(req);
 
diff --git a/content/workers/testing/vitest-integration/get-started/write-your-first-test.md b/content/workers/testing/vitest-integration/get-started/write-your-first-test.md
index be4ac901514a555..15a19bf89fc883e 100644
--- a/content/workers/testing/vitest-integration/get-started/write-your-first-test.md
+++ b/content/workers/testing/vitest-integration/get-started/write-your-first-test.md
@@ -232,7 +232,7 @@ export default {
 filename: index.ts
 ---
 export default {
-	async fetch(request: Request, env: Env, ctx: ExecutionContext) {
+	async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
     const { pathname } = new URL(request.url);
 
     if(pathname === "/404") {
diff --git a/content/workers/tutorials/upload-assets-with-r2/index.md b/content/workers/tutorials/upload-assets-with-r2/index.md
index 3adfab01848163e..fce1c564fc53978 100644
--- a/content/workers/tutorials/upload-assets-with-r2/index.md
+++ b/content/workers/tutorials/upload-assets-with-r2/index.md
@@ -128,7 +128,7 @@ Now, add a new code path that handles a `PUT` HTTP request. This new code will c
 filename: worker.ts
 ---
 export default {
-  async fetch(request: Request, env: unknown) {
+  async fetch(request: Request, env: unknown): Promise<Response> {
     if (request.method === 'PUT') {
       // Note that you could require authentication for all requests
       // by moving this code to the top of the fetch function.