diff --git a/packages/adapter-cloudflare/package.json b/packages/adapter-cloudflare/package.json
index 245cf859ec6d..ed8bb64ac727 100644
--- a/packages/adapter-cloudflare/package.json
+++ b/packages/adapter-cloudflare/package.json
@@ -23,7 +23,7 @@
 	],
 	"main": "index.js",
 	"scripts": {
-		"build": "esbuild src/worker.ts --bundle --outfile=files/worker.js --external:SERVER --external:MANIFEST --format=esm",
+		"build": "esbuild src/worker.js --bundle --outfile=files/worker.js --external:SERVER --external:MANIFEST --format=esm",
 		"lint": "eslint --ignore-path .gitignore \"**/*.{ts,js,svelte}\" && npm run check-format",
 		"format": "npm run check-format -- --write",
 		"check": "tsc --skipLibCheck",
diff --git a/packages/adapter-cloudflare/src/worker.ts b/packages/adapter-cloudflare/src/worker.js
similarity index 88%
rename from packages/adapter-cloudflare/src/worker.ts
rename to packages/adapter-cloudflare/src/worker.js
index 0daae44e281c..dbb8f31c3bae 100644
--- a/packages/adapter-cloudflare/src/worker.ts
+++ b/packages/adapter-cloudflare/src/worker.js
@@ -2,18 +2,12 @@ import { Server } from 'SERVER';
 import { manifest, prerendered } from 'MANIFEST';
 import * as Cache from 'worktop/cfw.cache';
 
-import type { Module, Bindings } from 'worktop/cfw';
-import type { Durable } from 'worktop/cfw.durable';
-
-interface Environment extends Bindings {
-	ASSETS: Durable.Object;
-}
-
 const server = new Server(manifest);
 
 const prefix = `/${manifest.appDir}/`;
 
-const worker: Module.Worker<Environment> = {
+/** @type {import('worktop/cfw').Module.Worker<{ ASSETS: import('worktop/cfw.durable').Durable.Object }>} */
+const worker = {
 	async fetch(req, env, context) {
 		try {
 			let res = await Cache.lookup(req);