diff --git a/.changeset/plenty-beers-decide.md b/.changeset/plenty-beers-decide.md
new file mode 100644
index 00000000000..87bc58c3589
--- /dev/null
+++ b/.changeset/plenty-beers-decide.md
@@ -0,0 +1,13 @@
+---
+'@firebase/rules-unit-testing': patch
+'@firebase/firestore-compat': patch
+'@firebase/functions-compat': patch
+'@firebase/storage-compat': patch
+'@firebase/auth-compat': patch
+'@firebase/firestore': patch
+'@firebase/functions': patch
+'@firebase/storage': patch
+'@firebase/auth': patch
+---
+
+Removed dependency on undici and node-fetch in our node bundles, replacing them with the native fetch implementation.
diff --git a/integration/messaging/package.json b/integration/messaging/package.json
index 864faa99987..f34637fba05 100644
--- a/integration/messaging/package.json
+++ b/integration/messaging/package.json
@@ -15,7 +15,6 @@
     "express": "4.19.2",
     "geckodriver": "2.0.4",
     "mocha": "9.2.2",
-    "undici": "6.19.7",
     "selenium-assistant": "6.1.1"
   },
   "engines": {
diff --git a/integration/messaging/test/utils/sendMessage.js b/integration/messaging/test/utils/sendMessage.js
index 1d2e95054eb..6393e90364c 100644
--- a/integration/messaging/test/utils/sendMessage.js
+++ b/integration/messaging/test/utils/sendMessage.js
@@ -15,7 +15,6 @@
  * limitations under the License.
  */
 
-const undici = require('undici');
 const FCM_SEND_ENDPOINT = 'https://fcm.googleapis.com/fcm/send';
 // Rotatable fcm server key. It's generally a bad idea to expose server keys. The reason is to
 // simplify testing process (no need to implement server side decryption of git secret). The
@@ -28,7 +27,7 @@ module.exports = async payload => {
     'Requesting to send an FCM message with payload: ' + JSON.stringify(payload)
   );
 
-  const response = await undici.fetch(FCM_SEND_ENDPOINT, {
+  const response = await fetch(FCM_SEND_ENDPOINT, {
     method: 'POST',
     body: JSON.stringify(payload),
     headers: {
diff --git a/package.json b/package.json
index 18ddbe42bff..41d92b74fb6 100644
--- a/package.json
+++ b/package.json
@@ -156,7 +156,6 @@
     "tslint": "6.1.3",
     "typedoc": "0.16.11",
     "typescript": "4.7.4",
-    "undici": "6.19.7",
     "watch": "1.0.2",
     "webpack": "5.76.0",
     "yargs": "17.7.2"
diff --git a/packages/auth-compat/index.node.ts b/packages/auth-compat/index.node.ts
index 6d8dd2c07a5..1513148bea9 100644
--- a/packages/auth-compat/index.node.ts
+++ b/packages/auth-compat/index.node.ts
@@ -23,15 +23,6 @@
  */
 export * from './index';
 import { FetchProvider } from '@firebase/auth/internal';
-import {
-  fetch as undiciFetch,
-  Headers as undiciHeaders,
-  Response as undiciResponse
-} from 'undici';
 import './index';
 
-FetchProvider.initialize(
-  undiciFetch as unknown as typeof fetch,
-  undiciHeaders as unknown as typeof Headers,
-  undiciResponse as unknown as typeof Response
-);
+FetchProvider.initialize(fetch, Headers, Response);
diff --git a/packages/auth-compat/karma.conf.js b/packages/auth-compat/karma.conf.js
index f3f14e8d1b1..6283ffbc3f1 100644
--- a/packages/auth-compat/karma.conf.js
+++ b/packages/auth-compat/karma.conf.js
@@ -30,18 +30,6 @@ module.exports = function (config) {
     // frameworks to use
     // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
     frameworks: ['mocha'],
-    // undici is a fetch polyfill that test helpers call for Node tests, and browser tests should
-    // ignore its import to avoid compilation errors in those test helpers.
-    webpack: {
-      ...webpackBase,
-      resolve: {
-        ...webpackBase.resolve,
-        alias: {
-          'undici': false
-        }
-      }
-    },
-
     client: Object.assign({}, karmaBase.client, getClientConfig())
   });
 
diff --git a/packages/auth-compat/package.json b/packages/auth-compat/package.json
index 6db6e7ba89d..d6d5d9573b8 100644
--- a/packages/auth-compat/package.json
+++ b/packages/auth-compat/package.json
@@ -55,7 +55,6 @@
     "@firebase/auth-types": "0.12.2",
     "@firebase/component": "0.6.8",
     "@firebase/util": "1.9.7",
-    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "license": "Apache-2.0",
diff --git a/packages/auth/karma.conf.js b/packages/auth/karma.conf.js
index 1d28c329f55..f8dcd5b0341 100644
--- a/packages/auth/karma.conf.js
+++ b/packages/auth/karma.conf.js
@@ -27,17 +27,6 @@ module.exports = function (config) {
     // frameworks to use
     // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
     frameworks: ['mocha'],
-    // undici is a fetch polyfill that test helpers call for Node tests, and browser tests should
-    // ignore its import to avoid compilation errors in those test helpers.
-    webpack: {
-      ...webpackBase,
-      resolve: {
-        ...webpackBase.resolve,
-        alias: {
-          'undici': false
-        }
-      }
-    },
     client: Object.assign({}, karmaBase.client, getClientConfig(argv))
   });
 
diff --git a/packages/auth/package.json b/packages/auth/package.json
index 7d41b0c5962..2dff1631c02 100644
--- a/packages/auth/package.json
+++ b/packages/auth/package.json
@@ -130,7 +130,6 @@
     "@firebase/component": "0.6.8",
     "@firebase/logger": "0.4.2",
     "@firebase/util": "1.9.7",
-    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "license": "Apache-2.0",
diff --git a/packages/auth/src/platform_node/index.ts b/packages/auth/src/platform_node/index.ts
index 41da18ff643..67618b5b773 100644
--- a/packages/auth/src/platform_node/index.ts
+++ b/packages/auth/src/platform_node/index.ts
@@ -28,18 +28,9 @@ import { AuthImpl } from '../core/auth/auth_impl';
 
 import { FetchProvider } from '../core/util/fetch_provider';
 import { getDefaultEmulatorHost } from '@firebase/util';
-import {
-  fetch as undiciFetch,
-  Headers as undiciHeaders,
-  Response as undiciResponse
-} from 'undici';
 
 // Initialize the fetch polyfill, the types are slightly off so just cast and hope for the best
-FetchProvider.initialize(
-  undiciFetch as unknown as typeof fetch,
-  undiciHeaders as unknown as typeof Headers,
-  undiciResponse as unknown as typeof Response
-);
+FetchProvider.initialize(fetch, Headers, Response);
 
 // First, we set up the various platform-specific features for Node (register
 // the version and declare the Node getAuth function)
diff --git a/packages/auth/test/helpers/integration/emulator_rest_helpers.ts b/packages/auth/test/helpers/integration/emulator_rest_helpers.ts
index 32b9aad2129..5a96d193ee1 100644
--- a/packages/auth/test/helpers/integration/emulator_rest_helpers.ts
+++ b/packages/auth/test/helpers/integration/emulator_rest_helpers.ts
@@ -15,7 +15,6 @@
  * limitations under the License.
  */
 
-import { fetch as undiciFetch, RequestInit as undiciRequestInit } from 'undici';
 import { getAppConfig, getEmulatorUrl } from './settings';
 
 export interface VerificationSession {
@@ -88,9 +87,8 @@ function doFetch(url: string, request?: RequestInit): ReturnType<typeof fetch> {
   if (typeof document !== 'undefined') {
     return fetch(url, request);
   } else {
-    return undiciFetch(
-      url,
-      request as undiciRequestInit
-    ) as unknown as ReturnType<typeof fetch>;
+    return fetch(url, request as RequestInit) as unknown as ReturnType<
+      typeof fetch
+    >;
   }
 }
diff --git a/packages/firestore/package.json b/packages/firestore/package.json
index 1ba59e3a8dd..5c630f7837e 100644
--- a/packages/firestore/package.json
+++ b/packages/firestore/package.json
@@ -103,7 +103,6 @@
     "@firebase/webchannel-wrapper": "1.0.1",
     "@grpc/grpc-js": "~1.9.0",
     "@grpc/proto-loader": "^0.7.8",
-    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "peerDependencies": {
diff --git a/packages/firestore/src/platform/browser_lite/connection.ts b/packages/firestore/src/platform/browser_lite/connection.ts
index a6464245441..573f743a882 100644
--- a/packages/firestore/src/platform/browser_lite/connection.ts
+++ b/packages/firestore/src/platform/browser_lite/connection.ts
@@ -24,5 +24,5 @@ export { newConnectivityMonitor } from '../browser/connection';
 
 /** Initializes the HTTP connection for the REST API. */
 export function newConnection(databaseInfo: DatabaseInfo): Connection {
-  return new FetchConnection(databaseInfo, fetch.bind(null));
+  return new FetchConnection(databaseInfo);
 }
diff --git a/packages/firestore/src/platform/browser_lite/fetch_connection.ts b/packages/firestore/src/platform/browser_lite/fetch_connection.ts
index cad3c372ad5..d11247c8019 100644
--- a/packages/firestore/src/platform/browser_lite/fetch_connection.ts
+++ b/packages/firestore/src/platform/browser_lite/fetch_connection.ts
@@ -16,7 +16,6 @@
  */
 
 import { Token } from '../../api/credentials';
-import { DatabaseInfo } from '../../core/database_info';
 import { Stream } from '../../remote/connection';
 import { RestConnection } from '../../remote/rest_connection';
 import { mapCodeFromHttpStatus } from '../../remote/rpc_error';
@@ -28,17 +27,6 @@ import { StringMap } from '../../util/types';
  * (e.g. `fetch` or a polyfill).
  */
 export class FetchConnection extends RestConnection {
-  /**
-   * @param databaseInfo - The connection info.
-   * @param fetchImpl - `fetch` or a Polyfill that implements the fetch API.
-   */
-  constructor(
-    databaseInfo: DatabaseInfo,
-    private readonly fetchImpl: typeof fetch
-  ) {
-    super(databaseInfo);
-  }
-
   openStream<Req, Resp>(
     rpcName: string,
     token: Token | null
@@ -56,7 +44,7 @@ export class FetchConnection extends RestConnection {
     let response: Response;
 
     try {
-      response = await this.fetchImpl(url, {
+      response = await fetch(url, {
         method: 'POST',
         headers,
         body: requestJson
diff --git a/packages/firestore/src/platform/node_lite/connection.ts b/packages/firestore/src/platform/node_lite/connection.ts
index e85bb89bc97..7258661c184 100644
--- a/packages/firestore/src/platform/node_lite/connection.ts
+++ b/packages/firestore/src/platform/node_lite/connection.ts
@@ -15,8 +15,6 @@
  * limitations under the License.
  */
 
-import { fetch as undiciFetch } from 'undici';
-
 import { DatabaseInfo } from '../../core/database_info';
 import { Connection } from '../../remote/connection';
 import { FetchConnection } from '../browser_lite/fetch_connection';
@@ -25,8 +23,5 @@ export { newConnectivityMonitor } from '../browser/connection';
 
 /** Initializes the HTTP connection for the REST API. */
 export function newConnection(databaseInfo: DatabaseInfo): Connection {
-  // undici is meant to be API compatible with `fetch`, but its type doesn't
-  // match 100%.
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  return new FetchConnection(databaseInfo, undiciFetch as any);
+  return new FetchConnection(databaseInfo);
 }
diff --git a/packages/functions/karma.conf.js b/packages/functions/karma.conf.js
index 3dc9b7d572c..db9bf05bfe0 100644
--- a/packages/functions/karma.conf.js
+++ b/packages/functions/karma.conf.js
@@ -26,18 +26,7 @@ module.exports = function (config) {
     files,
     // frameworks to use
     // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
-    frameworks: ['mocha'],
-    // undici is a fetch polyfill that test helpers call for Node tests, and browser tests should
-    // ignore its import to avoid compilation errors in those test helpers.
-    webpack: {
-      ...webpackBase,
-      resolve: {
-        ...webpackBase.resolve,
-        alias: {
-          'undici': false
-        }
-      }
-    }
+    frameworks: ['mocha']
   });
 
   config.set(karmaConfig);
diff --git a/packages/functions/package.json b/packages/functions/package.json
index 3ede8a4c3f9..5be9917b301 100644
--- a/packages/functions/package.json
+++ b/packages/functions/package.json
@@ -72,7 +72,6 @@
     "@firebase/auth-interop-types": "0.2.3",
     "@firebase/app-check-interop-types": "0.3.2",
     "@firebase/util": "1.9.7",
-    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "nyc": {
diff --git a/packages/functions/src/config.ts b/packages/functions/src/config.ts
index 6c4dac26e6a..656158da10d 100644
--- a/packages/functions/src/config.ts
+++ b/packages/functions/src/config.ts
@@ -35,10 +35,7 @@ const APP_CHECK_INTERNAL_NAME: AppCheckInternalComponentName =
 const MESSAGING_INTERNAL_NAME: MessagingInternalComponentName =
   'messaging-internal';
 
-export function registerFunctions(
-  fetchImpl: typeof fetch,
-  variant?: string
-): void {
+export function registerFunctions(variant?: string): void {
   const factory: InstanceFactory<'functions'> = (
     container: ComponentContainer,
     { instanceIdentifier: regionOrCustomDomain }
@@ -55,8 +52,7 @@ export function registerFunctions(
       authProvider,
       messagingProvider,
       appCheckProvider,
-      regionOrCustomDomain,
-      fetchImpl
+      regionOrCustomDomain
     );
   };
 
diff --git a/packages/functions/src/index.node.ts b/packages/functions/src/index.node.ts
index 6fb63173957..6b1a2ee2939 100644
--- a/packages/functions/src/index.node.ts
+++ b/packages/functions/src/index.node.ts
@@ -15,9 +15,8 @@
  * limitations under the License.
  */
 import { registerFunctions } from './config';
-import { fetch as undiciFetch } from 'undici';
 
 export * from './api';
+export * from './public-types';
 
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-registerFunctions(undiciFetch as any, 'node');
+registerFunctions('node');
diff --git a/packages/functions/src/index.ts b/packages/functions/src/index.ts
index 7318b3e64b7..6d404cc8245 100644
--- a/packages/functions/src/index.ts
+++ b/packages/functions/src/index.ts
@@ -25,4 +25,4 @@ import { registerFunctions } from './config';
 export * from './api';
 export * from './public-types';
 
-registerFunctions(fetch.bind(self));
+registerFunctions();
diff --git a/packages/functions/src/service.ts b/packages/functions/src/service.ts
index c5fe7fa8a85..986dcbc735d 100644
--- a/packages/functions/src/service.ts
+++ b/packages/functions/src/service.ts
@@ -104,8 +104,7 @@ export class FunctionsService implements _FirebaseService {
     authProvider: Provider<FirebaseAuthInternalName>,
     messagingProvider: Provider<MessagingInternalComponentName>,
     appCheckProvider: Provider<AppCheckInternalComponentName>,
-    regionOrCustomDomain: string = DEFAULT_REGION,
-    readonly fetchImpl: typeof fetch
+    regionOrCustomDomain: string = DEFAULT_REGION
   ) {
     this.contextProvider = new ContextProvider(
       authProvider,
@@ -212,14 +211,13 @@ export function httpsCallableFromURL<RequestData, ResponseData>(
 async function postJSON(
   url: string,
   body: unknown,
-  headers: { [key: string]: string },
-  fetchImpl: typeof fetch
+  headers: { [key: string]: string }
 ): Promise<HttpResponse> {
   headers['Content-Type'] = 'application/json';
 
   let response: Response;
   try {
-    response = await fetchImpl(url, {
+    response = await fetch(url, {
       method: 'POST',
       body: JSON.stringify(body),
       headers
@@ -296,7 +294,7 @@ async function callAtURL(
 
   const failAfterHandle = failAfter(timeout);
   const response = await Promise.race([
-    postJSON(url, body, headers, functionsInstance.fetchImpl),
+    postJSON(url, body, headers),
     failAfterHandle.promise,
     functionsInstance.cancelAllRequests
   ]);
diff --git a/packages/functions/test/utils.ts b/packages/functions/test/utils.ts
index 0eb0b678c19..bcf0286b49d 100644
--- a/packages/functions/test/utils.ts
+++ b/packages/functions/test/utils.ts
@@ -21,7 +21,6 @@ import { FirebaseAuthInternalName } from '@firebase/auth-interop-types';
 import { AppCheckInternalComponentName } from '@firebase/app-check-interop-types';
 import { FunctionsService } from '../src/service';
 import { connectFunctionsEmulator } from '../src/api';
-import { fetch as undiciFetch } from 'undici';
 import { MessagingInternalComponentName } from '../../../packages/messaging-interop-types';
 
 export function makeFakeApp(options: FirebaseOptions = {}): FirebaseApp {
@@ -58,15 +57,12 @@ export function createTestService(
     new ComponentContainer('test')
   )
 ): FunctionsService {
-  const fetchImpl: typeof fetch =
-    typeof window !== 'undefined' ? fetch.bind(window) : (undiciFetch as any);
   const functions = new FunctionsService(
     app,
     authProvider,
     messagingProvider,
     appCheckProvider,
-    region,
-    fetchImpl
+    region
   );
   const useEmulator = !!process.env.FIREBASE_FUNCTIONS_EMULATOR_ORIGIN;
   if (useEmulator) {
diff --git a/packages/rules-unit-testing/package.json b/packages/rules-unit-testing/package.json
index 4053cca8e17..585a0efc5e8 100644
--- a/packages/rules-unit-testing/package.json
+++ b/packages/rules-unit-testing/package.json
@@ -53,9 +53,5 @@
   "typings": "dist/index.d.ts",
   "bugs": {
     "url": "https://github.com/firebase/firebase-js-sdk/issues"
-  },
-  "dependencies": {
-    "node-fetch": "2.6.7",
-    "@types/node-fetch": "2.6.4"
   }
 }
diff --git a/packages/rules-unit-testing/src/impl/discovery.ts b/packages/rules-unit-testing/src/impl/discovery.ts
index 9798f017241..3c7c20fedad 100644
--- a/packages/rules-unit-testing/src/impl/discovery.ts
+++ b/packages/rules-unit-testing/src/impl/discovery.ts
@@ -16,7 +16,6 @@
  */
 
 import { EmulatorConfig, HostAndPort } from '../public_types';
-import nodeFetch from 'node-fetch';
 import { makeUrl, fixHostname } from './url';
 
 /**
@@ -27,9 +26,9 @@ import { makeUrl, fixHostname } from './url';
  */
 export async function discoverEmulators(
   hub: HostAndPort,
-  fetch: typeof nodeFetch = nodeFetch
+  fetchImpl: typeof fetch = fetch
 ): Promise<DiscoveredEmulators> {
-  const res = await fetch(makeUrl(hub, '/emulators'));
+  const res = await fetchImpl(makeUrl(hub, '/emulators'));
   if (!res.ok) {
     throw new Error(
       `HTTP Error ${res.status} when attempting to reach Emulator Hub at ${res.url}, are you sure it is running?`
diff --git a/packages/rules-unit-testing/src/impl/rules.ts b/packages/rules-unit-testing/src/impl/rules.ts
index 7d4d900367f..fefeb586233 100644
--- a/packages/rules-unit-testing/src/impl/rules.ts
+++ b/packages/rules-unit-testing/src/impl/rules.ts
@@ -17,7 +17,6 @@
 
 import { HostAndPort } from '../public_types';
 import { makeUrl } from './url';
-import fetch from 'node-fetch';
 
 /**
  * @private
diff --git a/packages/rules-unit-testing/src/impl/test_environment.ts b/packages/rules-unit-testing/src/impl/test_environment.ts
index cb325912c29..5e0f4c613fe 100644
--- a/packages/rules-unit-testing/src/impl/test_environment.ts
+++ b/packages/rules-unit-testing/src/impl/test_environment.ts
@@ -15,7 +15,6 @@
  * limitations under the License.
  */
 
-import fetch from 'node-fetch';
 import firebase from 'firebase/compat/app';
 import 'firebase/compat/firestore';
 import 'firebase/compat/database';
diff --git a/packages/rules-unit-testing/src/util.ts b/packages/rules-unit-testing/src/util.ts
index c96b22d8597..abcad41ef9b 100644
--- a/packages/rules-unit-testing/src/util.ts
+++ b/packages/rules-unit-testing/src/util.ts
@@ -21,7 +21,6 @@ import {
 } from './impl/discovery';
 import { fixHostname, makeUrl } from './impl/url';
 import { HostAndPort } from './public_types';
-import fetch from 'node-fetch';
 
 /**
  * Run a setup function with background Cloud Functions triggers disabled. This can be used to
diff --git a/packages/rules-unit-testing/test/impl/discovery.test.ts b/packages/rules-unit-testing/test/impl/discovery.test.ts
index a2ac2be767b..39b5628ddc2 100644
--- a/packages/rules-unit-testing/test/impl/discovery.test.ts
+++ b/packages/rules-unit-testing/test/impl/discovery.test.ts
@@ -71,7 +71,7 @@ describe('discoverEmulators()', () => {
     // Connect to port:0. Should always fail (although error codes may differ among OSes).
     await expect(
       discoverEmulators({ host: '127.0.0.1', port: 0 })
-    ).to.be.rejectedWith(/EADDRNOTAVAIL|ECONNREFUSED/);
+    ).to.be.rejectedWith(/EADDRNOTAVAIL|ECONNREFUSED|fetch failed/);
   });
 
   it('throws if response status is not 2xx', async () => {
diff --git a/packages/rules-unit-testing/test/util.test.ts b/packages/rules-unit-testing/test/util.test.ts
index 9dc778fb93e..e3b514d6a10 100644
--- a/packages/rules-unit-testing/test/util.test.ts
+++ b/packages/rules-unit-testing/test/util.test.ts
@@ -165,7 +165,7 @@ describe('assertFails()', () => {
 
 describe('withFunctionTriggersDisabled()', () => {
   it('disabling function triggers does not throw, returns value', async function () {
-    const fetchSpy = sinon.spy(require('node-fetch'), 'default');
+    const fetchSpy = sinon.spy(globalThis, 'fetch');
 
     const res = await withFunctionTriggersDisabled(() => {
       return Promise.resolve(1234);
@@ -176,7 +176,7 @@ describe('withFunctionTriggersDisabled()', () => {
   });
 
   it('disabling function triggers always re-enables, event when the function throws', async function () {
-    const fetchSpy = sinon.spy(require('node-fetch'), 'default');
+    const fetchSpy = sinon.spy(globalThis, 'fetch');
 
     const res = withFunctionTriggersDisabled(() => {
       throw new Error('I throw!');
diff --git a/packages/storage/package.json b/packages/storage/package.json
index 94453f9fce8..c588756199f 100644
--- a/packages/storage/package.json
+++ b/packages/storage/package.json
@@ -50,7 +50,6 @@
   "dependencies": {
     "@firebase/util": "1.9.7",
     "@firebase/component": "0.6.8",
-    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "peerDependencies": {
diff --git a/packages/storage/src/platform/node/connection.ts b/packages/storage/src/platform/node/connection.ts
index d7141e6ef68..c90f664c3b2 100644
--- a/packages/storage/src/platform/node/connection.ts
+++ b/packages/storage/src/platform/node/connection.ts
@@ -21,7 +21,6 @@ import {
   ErrorCode
 } from '../../implementation/connection';
 import { internalError } from '../../implementation/error';
-import { fetch as undiciFetch, Headers as undiciHeaders } from 'undici';
 
 /** An override for the text-based Connection. Used in tests. */
 let textFactoryOverride: (() => Connection<string>) | null = null;
@@ -39,9 +38,8 @@ abstract class FetchConnection<T extends ConnectionType>
   protected statusCode_: number | undefined;
   protected body_: ArrayBuffer | undefined;
   protected errorText_ = '';
-  protected headers_: undiciHeaders | undefined;
+  protected headers_: Headers | undefined;
   protected sent_: boolean = false;
-  protected fetch_ = undiciFetch;
 
   constructor() {
     this.errorCode_ = ErrorCode.NO_ERROR;
@@ -59,7 +57,7 @@ abstract class FetchConnection<T extends ConnectionType>
     this.sent_ = true;
 
     try {
-      const response = await this.fetch_(url, {
+      const response = await fetch(url, {
         method,
         headers: headers || {},
         body: body as NodeJS.ArrayBufferView | string
@@ -163,7 +161,7 @@ export class FetchStreamConnection extends FetchConnection<
     this.sent_ = true;
 
     try {
-      const response = await this.fetch_(url, {
+      const response = await fetch(url, {
         method,
         headers: headers || {},
         body: body as NodeJS.ArrayBufferView | string
diff --git a/packages/storage/test/node/connection.test.ts b/packages/storage/test/node/connection.test.ts
index 32c499f0209..925d1f8f7dc 100644
--- a/packages/storage/test/node/connection.test.ts
+++ b/packages/storage/test/node/connection.test.ts
@@ -24,9 +24,9 @@ describe('Connections', () => {
   it('FetchConnection.send() should not reject on network errors', async () => {
     const connection = new FetchBytesConnection();
 
-    // need the casting here because fetch_ is a private member
-    stub(connection as any, 'fetch_').rejects();
+    const fetchStub = stub(globalThis, 'fetch').rejects();
     await connection.send('testurl', 'GET');
     expect(connection.getErrorCode()).to.equal(ErrorCode.NETWORK_ERROR);
+    fetchStub.restore();
   });
 });
diff --git a/repo-scripts/changelog-generator/index.ts b/repo-scripts/changelog-generator/index.ts
index 20f3de482f1..3570c8a96a5 100644
--- a/repo-scripts/changelog-generator/index.ts
+++ b/repo-scripts/changelog-generator/index.ts
@@ -17,7 +17,6 @@
 
 import { ChangelogFunctions } from '@changesets/types';
 import { getInfo } from '@changesets/get-github-info';
-import { fetch as undiciFetch, Response as undiciResponse } from 'undici';
 
 const changelogFunctions: ChangelogFunctions = {
   getDependencyReleaseLine: async (
@@ -95,7 +94,7 @@ async function getFixedIssueLink(
   prNumber: number,
   repo: string
 ): Promise<string> {
-  const response = await undiciFetch(
+  const response = await fetch(
     `https://api.github.com/repos/${repo}/pulls/${prNumber}`,
     {
       method: 'GET',
@@ -105,7 +104,7 @@ async function getFixedIssueLink(
     }
   ).then(data => data.json());
 
-  const body = (response as undiciResponse).body;
+  const body = (response as Response).body;
   if (!body) {
     return '';
   }
diff --git a/repo-scripts/changelog-generator/package.json b/repo-scripts/changelog-generator/package.json
index 5d791be54bf..09313c27ed6 100644
--- a/repo-scripts/changelog-generator/package.json
+++ b/repo-scripts/changelog-generator/package.json
@@ -19,8 +19,7 @@
   "dependencies": {
     "@changesets/types": "3.3.0",
     "@changesets/get-github-info": "0.5.2",
-    "@types/node": "20.8.10",
-    "undici": "6.19.7"
+    "@types/node": "20.8.10"
   },
   "license": "Apache-2.0",
   "devDependencies": {
diff --git a/scripts/emulator-testing/emulators/emulator.ts b/scripts/emulator-testing/emulators/emulator.ts
index 1295d413e4b..ba69e049ad6 100644
--- a/scripts/emulator-testing/emulators/emulator.ts
+++ b/scripts/emulator-testing/emulators/emulator.ts
@@ -21,7 +21,6 @@ import { ChildProcess } from 'child_process';
 import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
-import fetch from 'node-fetch';
 // @ts-ignore
 import * as tmp from 'tmp';
 
@@ -51,35 +50,60 @@ export abstract class Emulator {
     return new Promise<void>((resolve, reject) => {
       tmp.dir((err: Error | null, dir: string) => {
         if (err) reject(err);
-
         console.log(`Created temporary directory at [${dir}].`);
         const filepath: string = path.resolve(dir, this.binaryName);
-        const writeStream: fs.WriteStream = fs.createWriteStream(filepath);
-
+        const writer = fs.createWriteStream(filepath);
         console.log(`Downloading emulator from [${this.binaryUrl}] ...`);
-        fetch(this.binaryUrl).then(resp => {
-          resp.body
-            .pipe(writeStream)
-            .on('finish', () => {
-              console.log(`Saved emulator binary file to [${filepath}].`);
-              // Change emulator binary file permission to 'rwxr-xr-x'.
-              // The execute permission is required for it to be able to start
-              // with 'java -jar'.
-              fs.chmod(filepath, 0o755, err => {
-                if (err) reject(err);
-                console.log(
-                  `Changed emulator file permissions to 'rwxr-xr-x'.`
-                );
-                this.binaryPath = filepath;
-
-                if (this.copyToCache()) {
-                  console.log(`Cached emulator at ${this.cacheBinaryPath}`);
+        // Map the DOM's fetch Reader to node's streaming file system
+        // operations. We will need to access class members `binaryPath` and `copyToCache` after the
+        // download completes. It's a compilation error to pass `this` into the named function
+        // `readChunk`, so the download operation is wrapped in a promise that we wait upon.
+        const downloadPromise = new Promise<void>(
+          (downloadComplete, downloadFailed) => {
+            fetch(this.binaryUrl)
+              .then(resp => {
+                if (resp.status !== 200 || resp.body === null) {
+                  console.log('Download of emulator failed: ', resp.statusText);
+                  downloadFailed();
+                } else {
+                  const reader = resp.body.getReader();
+                  reader.read().then(function readChunk({ done, value }): any {
+                    if (done) {
+                      downloadComplete();
+                    } else {
+                      writer.write(value);
+                      return reader.read().then(readChunk);
+                    }
+                  });
                 }
-                resolve();
+              })
+              .catch(e => {
+                console.log(`Download of emulator failed: ${e}`);
+                downloadFailed();
               });
-            })
-            .on('error', reject);
-        });
+          }
+        );
+
+        downloadPromise.then(
+          () => {
+            console.log('Download complete');
+            // Change emulator binary file permission to 'rwxr-xr-x'.
+            // The execute permission is required for it to be able to start
+            // with 'java -jar'.
+            fs.chmod(filepath, 0o755, err => {
+              if (err) reject(err);
+              console.log(`Changed emulator file permissions to 'rwxr-xr-x'.`);
+              this.binaryPath = filepath;
+              if (this.copyToCache()) {
+                console.log(`Cached emulator at ${this.cacheBinaryPath}`);
+              }
+              resolve();
+            });
+          },
+          () => {
+            reject();
+          }
+        );
       });
     });
   }
diff --git a/yarn.lock b/yarn.lock
index 477e784871e..f3fc015f9ec 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3480,14 +3480,6 @@
   dependencies:
     "@types/node" "*"
 
-"@types/node-fetch@2.6.4":
-  version "2.6.4"
-  resolved "https://registry.npmjs.org/@types/node-fetch/-/node-fetch-2.6.4.tgz"
-  integrity sha512-1ZX9fcN4Rvkvgv4E6PAY5WXUFWFcRWxZa3EW83UjycOB9ljJCedb2CupIP4RZMEwF/M3eTcCihbBRgwtGbg5Rg==
-  dependencies:
-    "@types/node" "*"
-    form-data "^3.0.0"
-
 "@types/node@*", "@types/node@>=10.0.0", "@types/node@^12.7.1":
   version "12.20.50"
   resolved "https://registry.npmjs.org/@types/node/-/node-12.20.50.tgz"
@@ -8512,15 +8504,6 @@ form-data@^2.5.0:
     combined-stream "^1.0.6"
     mime-types "^2.1.12"
 
-form-data@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.npmjs.org/form-data/-/form-data-3.0.1.tgz"
-  integrity sha512-RHkBKtLWUVwd7SqRIvCZMEvAMoGUp0XU+seQiZejj0COz3RI3hWP4sCv3gZWWLjJTd7rGwcsF5eKZGii0r/hbg==
-  dependencies:
-    asynckit "^0.4.0"
-    combined-stream "^1.0.8"
-    mime-types "^2.1.12"
-
 form-data@^4.0.0:
   version "4.0.0"
   resolved "https://registry.npmjs.org/form-data/-/form-data-4.0.0.tgz"
@@ -12852,13 +12835,6 @@ node-emoji@^1.11.0:
   dependencies:
     lodash "^4.17.21"
 
-node-fetch@2.6.7, node-fetch@^2.6.7:
-  version "2.6.7"
-  resolved "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz"
-  integrity sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==
-  dependencies:
-    whatwg-url "^5.0.0"
-
 node-fetch@^2.5.0, node-fetch@^2.6.1:
   version "2.6.5"
   resolved "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.5.tgz"
@@ -12866,6 +12842,13 @@ node-fetch@^2.5.0, node-fetch@^2.6.1:
   dependencies:
     whatwg-url "^5.0.0"
 
+node-fetch@^2.6.7:
+  version "2.6.7"
+  resolved "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz"
+  integrity sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==
+  dependencies:
+    whatwg-url "^5.0.0"
+
 node-forge@^0.10.0:
   version "0.10.0"
   resolved "https://registry.npmjs.org/node-forge/-/node-forge-0.10.0.tgz"
@@ -17388,11 +17371,6 @@ undici-types@~5.26.4:
   resolved "https://registry.npmjs.org/undici-types/-/undici-types-5.26.5.tgz#bcd539893d00b56e964fd2657a4866b221a65617"
   integrity sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==
 
-undici@6.19.7:
-  version "6.19.7"
-  resolved "https://registry.npmjs.org/undici/-/undici-6.19.7.tgz#7d4cf26dc689838aa8b6753a3c5c4288fc1e0216"
-  integrity sha512-HR3W/bMGPSr90i8AAp2C4DM3wChFdJPLrWYpIS++LxS8K+W535qftjt+4MyjNYHeWabMj1nvtmLIi7l++iq91A==
-
 unicode-canonical-property-names-ecmascript@^2.0.0:
   version "2.0.0"
   resolved "https://registry.npmjs.org/unicode-canonical-property-names-ecmascript/-/unicode-canonical-property-names-ecmascript-2.0.0.tgz"