diff --git a/build.config.ts b/build.config.ts
index 6e7f730..373fb2c 100644
--- a/build.config.ts
+++ b/build.config.ts
@@ -4,4 +4,5 @@ export default defineBuildConfig({
   rollup: {
     inlineDependencies: true,
   },
+  externals: ["@cloudflare/workers-types"],
 });
diff --git a/playground/bun.ts b/playground/bun.ts
index e8b7d58..de69f0b 100644
--- a/playground/bun.ts
+++ b/playground/bun.ts
@@ -1,7 +1,5 @@
 // You can run this demo using `bun --bun ./bun.ts` or `npm run play:bun` in repo
 
-/// <reference types="bun-types" />
-
 import bunAdapter from "../src/adapters/bun";
 import { createDemo, getIndexHTMLURL } from "./_common";
 
diff --git a/playground/cloudflare.ts b/playground/cloudflare.ts
index b9b760d..838ebb5 100644
--- a/playground/cloudflare.ts
+++ b/playground/cloudflare.ts
@@ -1,6 +1,6 @@
 // You can run this demo using `npm run play:cf` in repo
 
-/// <reference types="@cloudflare/workers-types" />
+import type { Request, ExecutionContext } from "@cloudflare/workers-types";
 
 import cloudflareAdapter from "../src/adapters/cloudflare";
 
diff --git a/src/adapters/bun.ts b/src/adapters/bun.ts
index fb31e70..5ce2046 100644
--- a/src/adapters/bun.ts
+++ b/src/adapters/bun.ts
@@ -1,6 +1,7 @@
 // https://bun.sh/docs/api/websockets
 
-/// <reference types="bun-types" />
+// @ts-nocheck
+import type * as _bun from "bun-types";
 
 import { WebSocketMessage } from "../message";
 // import { WebSocketError } from "../error";
diff --git a/src/adapters/cloudflare.ts b/src/adapters/cloudflare.ts
index 9d79ee8..35b991e 100644
--- a/src/adapters/cloudflare.ts
+++ b/src/adapters/cloudflare.ts
@@ -1,6 +1,6 @@
 // https://developers.cloudflare.com/workers/examples/websockets/
 
-/// <reference types="@cloudflare/workers-types" />
+import type * as _cf from "@cloudflare/workers-types";
 
 import { WebSocketPeer } from "../peer";
 import { defineWebSocketAdapter } from "../adapter.js";
@@ -9,18 +9,25 @@ import { WebSocketError } from "../error";
 
 type Env = Record<string, any>;
 
+declare const WebSocketPair: typeof _cf.WebSocketPair;
+declare const Response: typeof _cf.Response;
+
 export interface AdapterOptions {}
 
 export interface Adapter {
-  handleUpgrade(req: Request, env: Env, context: ExecutionContext): Response;
+  handleUpgrade(
+    req: _cf.Request,
+    env: Env,
+    context: _cf.ExecutionContext,
+  ): _cf.Response;
 }
 
 export default defineWebSocketAdapter<Adapter, AdapterOptions>(
   (handler, opts = {}) => {
     const handleUpgrade = (
-      req: Request,
+      req: _cf.Request,
       env: Env,
-      context: ExecutionContext,
+      context: _cf.ExecutionContext,
     ) => {
       const pair = new WebSocketPair();
       const client = pair[0];
@@ -60,8 +67,8 @@ export default defineWebSocketAdapter<Adapter, AdapterOptions>(
 
 class CloudflareWebSocketPeer extends WebSocketPeer {
   constructor(
-    private _client: WebSocket,
-    private _server: WebSocket,
+    private _client: _cf.WebSocket,
+    private _server: _cf.WebSocket,
   ) {
     super();
   }
diff --git a/src/adapters/deno.ts b/src/adapters/deno.ts
index 155c782..e9c9f6e 100644
--- a/src/adapters/deno.ts
+++ b/src/adapters/deno.ts
@@ -3,7 +3,7 @@
 // https://examples.deno.land/http-server-websocket
 
 // @ts-nocheck
-import type * as _DENO_TYPES_ from "../../types/lib.deno.d.ts";
+import type * as _deno from "../../types/lib.deno.d.ts";
 
 import { WebSocketMessage } from "../message";
 import { WebSocketError } from "../error";
diff --git a/tsconfig.json b/tsconfig.json
index e9588d9..424cd44 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -4,6 +4,7 @@
     "module": "ESNext",
     "moduleResolution": "Node",
     "esModuleInterop": true,
+    "skipLibCheck": true,
     "strict": true
   },
   "include": ["src"]