diff --git a/src/event/_polyfills.ts b/src/event/_polyfills.ts
new file mode 100644
index 00000000..a8e7dc6b
--- /dev/null
+++ b/src/event/_polyfills.ts
@@ -0,0 +1,11 @@
+/**
+ * @deprecated Please use native web Headers
+ * https://developer.mozilla.org/en-US/docs/Web/API/Headers
+ */
+export const H3Headers = globalThis.Headers;
+
+/**
+ * @deprecated Please use native web Headers
+ * https://developer.mozilla.org/en-US/docs/Web/API/Headers
+ */
+export const H3Response = globalThis.Response;
diff --git a/src/event/index.ts b/src/event/index.ts
index 798f32de..68571eb1 100644
--- a/src/event/index.ts
+++ b/src/event/index.ts
@@ -1,6 +1,3 @@
 export * from "./event";
 export * from "./utils";
-
-// TODO: Drop in next major version
-export * from "./polyfills/headers";
-export * from "./polyfills/response";
+export * from "./_polyfills";
diff --git a/src/event/polyfills/headers.ts b/src/event/polyfills/headers.ts
deleted file mode 100644
index 7a18681d..00000000
--- a/src/event/polyfills/headers.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-/**
- * @deprecated Please use native web Headers
- * https://developer.mozilla.org/en-US/docs/Web/API/Headers
- */
-export class H3Headers implements Headers {
-  _headers: Record<string, string>;
-
-  constructor(init?: HeadersInit) {
-    if (!init) {
-      this._headers = {};
-    } else if (Array.isArray(init)) {
-      this._headers = Object.fromEntries(
-        init.map(([key, value]) => [key.toLowerCase(), value]),
-      );
-    } else if (init && "append" in init) {
-      this._headers = Object.fromEntries((init as any).entries());
-    } else {
-      this._headers = Object.fromEntries(
-        Object.entries(init).map(([key, value]) => [key.toLowerCase(), value]),
-      );
-    }
-  }
-
-  [Symbol.iterator](): IterableIterator<[string, string]> {
-    return this.entries();
-  }
-
-  entries(): IterableIterator<[string, string]> {
-    throw Object.entries(this._headers)[Symbol.iterator]();
-  }
-
-  keys(): IterableIterator<string> {
-    return Object.keys(this._headers)[Symbol.iterator]();
-  }
-
-  values(): IterableIterator<string> {
-    throw Object.values(this._headers)[Symbol.iterator]();
-  }
-
-  append(name: string, value: string): void {
-    const _name = name.toLowerCase();
-    this.set(_name, [this.get(_name), value].filter(Boolean).join(", "));
-  }
-
-  delete(name: string): void {
-    delete this._headers[name.toLowerCase()];
-  }
-
-  get(name: string): string | null {
-    return this._headers[name.toLowerCase()];
-  }
-
-  has(name: string): boolean {
-    return name.toLowerCase() in this._headers;
-  }
-
-  set(name: string, value: string): void {
-    this._headers[name.toLowerCase()] = String(value);
-  }
-
-  forEach(
-    callbackfn: (value: string, key: string, parent: Headers) => void,
-  ): void {
-    for (const [key, value] of Object.entries(this._headers)) {
-      callbackfn(value, key, this);
-    }
-  }
-}
diff --git a/src/event/polyfills/response.ts b/src/event/polyfills/response.ts
deleted file mode 100644
index 2e366a71..00000000
--- a/src/event/polyfills/response.ts
+++ /dev/null
@@ -1,63 +0,0 @@
-import type { EventHandlerResponse } from "../../types";
-import { H3Headers } from "./headers";
-
-/**
- * @deprecated Please use native web Response
- * https://developer.mozilla.org/en-US/docs/Web/API/Response
- */
-export class H3Response implements Response {
-  readonly headers: H3Headers;
-  readonly status: number;
-  readonly statusText: string;
-  readonly redirected: boolean;
-  readonly ok: boolean;
-  readonly url: string;
-  _body: string | ArrayBuffer | Uint8Array;
-
-  // TODO: yet to implement
-  readonly body: ReadableStream<Uint8Array> | null = null;
-  readonly type: ResponseType = "default";
-  readonly bodyUsed = false;
-
-  constructor(
-    body: BodyInit | EventHandlerResponse | null = null,
-    init: ResponseInit = {},
-  ) {
-    this.headers = new H3Headers(init.headers);
-    this.status = init.status ?? 200;
-    this.statusText = init.statusText || "";
-    this.redirected =
-      !!init.status && [301, 302, 307, 308].includes(init.status);
-    this._body = body;
-    this.url = "";
-    this.ok = this.status < 300 && this.status > 199;
-  }
-
-  clone(): H3Response {
-    return new H3Response(this.body, {
-      headers: this.headers,
-      status: this.status,
-      statusText: this.statusText,
-    });
-  }
-
-  arrayBuffer(): Promise<ArrayBuffer> {
-    return Promise.resolve(this._body as unknown as ArrayBuffer);
-  }
-
-  blob(): Promise<Blob> {
-    return Promise.resolve(this._body as unknown as Blob);
-  }
-
-  formData(): Promise<FormData> {
-    return Promise.resolve(this._body as unknown as FormData);
-  }
-
-  json<T = any>(): Promise<T> {
-    return Promise.resolve(this._body as unknown as T);
-  }
-
-  text(): Promise<string> {
-    return Promise.resolve(this._body as unknown as string);
-  }
-}