diff --git a/README.md b/README.md
index 11c4e4a..29ac658 100644
--- a/README.md
+++ b/README.md
@@ -26,10 +26,6 @@ npm install react-native-fast-io --save
 
 - React Native 0.76 or higher
 - Nitro Modules
-- Polyfills:
-  - TextDecoder, e.g. `@bacons/text-decoder`
-  - Streams, e.g. `web-streams-polyfill/polyfill`
-  - AsyncIterator, e.g. `@azure/core-asynciterator-polyfill`
 
 ### Usage
 
diff --git a/example/index.js b/example/index.js
index 9de06bd..bf54297 100644
--- a/example/index.js
+++ b/example/index.js
@@ -1,5 +1,3 @@
-import '@bacons/text-decoder/install'
-import 'web-streams-polyfill/polyfill'
 import '@azure/core-asynciterator-polyfill'
 
 import { AppRegistry } from 'react-native'
diff --git a/example/package.json b/example/package.json
index 715821d..0a28703 100644
--- a/example/package.json
+++ b/example/package.json
@@ -8,14 +8,11 @@
     "server": "bun server/index.ts"
   },
   "dependencies": {
-    "@azure/core-asynciterator-polyfill": "^1.0.2",
-    "@bacons/text-decoder": "^0.0.0",
     "cli-table3": "^0.6.5",
     "react": "18.3.1",
     "react-native": "0.76.0",
     "react-native-fast-io": "0.1.1",
-    "react-native-nitro-modules": "^0.15.0",
-    "web-streams-polyfill": "^4.0.0"
+    "react-native-nitro-modules": "^0.15.0"
   },
   "devDependencies": {
     "@babel/core": "^7.20.0",
diff --git a/example/tests/filesystem.tsx b/example/tests/filesystem.tsx
index d85f54f..928d8c0 100644
--- a/example/tests/filesystem.tsx
+++ b/example/tests/filesystem.tsx
@@ -1,7 +1,7 @@
 import React, { useState } from 'react'
 import { StyleSheet, Text, TouchableOpacity, View } from 'react-native'
 import { fetch } from 'react-native-fast-io/fetch'
-import { showOpenFilePicker } from 'react-native-fast-io/fs'
+import { File, showOpenFilePicker } from 'react-native-fast-io/fs'
 import { CompressionStream } from 'react-native-fast-io/streams'
 
 import { BASE_URL } from './benchmark'
diff --git a/packages/react-native-fast-io/package.json b/packages/react-native-fast-io/package.json
index 0b9082e..34f500d 100644
--- a/packages/react-native-fast-io/package.json
+++ b/packages/react-native-fast-io/package.json
@@ -46,7 +46,9 @@
     "react-native-nitro-modules": "^0.15.0"
   },
   "dependencies": {
-    "event-target-shim": "^6.0.2"
+    "event-target-shim": "^6.0.2",
+    "@bacons/text-decoder": "^0.0.0",
+    "web-streams-polyfill": "^4.0.0"
   },
   "devDependencies": {
     "nitro-codegen": "^0.15.0",
diff --git a/packages/react-native-fast-io/src/w3c/blob.ts b/packages/react-native-fast-io/src/w3c/blob.ts
index ff3e6ac..a712091 100644
--- a/packages/react-native-fast-io/src/w3c/blob.ts
+++ b/packages/react-native-fast-io/src/w3c/blob.ts
@@ -1,3 +1,6 @@
+import { ReadableStream } from './streams'
+import { TextDecoder } from './text'
+
 export class Blob implements globalThis.Blob {
   private parts: Array<BlobPart>
 
diff --git a/packages/react-native-fast-io/src/w3c/fetch.ts b/packages/react-native-fast-io/src/w3c/fetch.ts
index 3bf81ec..43f8c85 100644
--- a/packages/react-native-fast-io/src/w3c/fetch.ts
+++ b/packages/react-native-fast-io/src/w3c/fetch.ts
@@ -1,6 +1,7 @@
 import { Network, RequestMethod } from '../native/network.nitro'
 import { Blob } from './blob'
-import { fromReadableStream } from './streams'
+import { File } from './fs'
+import { fromReadableStream, ReadableStream } from './streams'
 
 export function fetch(
   url: string,
diff --git a/packages/react-native-fast-io/src/w3c/streams.ts b/packages/react-native-fast-io/src/w3c/streams.ts
index 36d6e47..2e7ea72 100644
--- a/packages/react-native-fast-io/src/w3c/streams.ts
+++ b/packages/react-native-fast-io/src/w3c/streams.ts
@@ -1,3 +1,5 @@
+import { ReadableStream, TransformStream, WritableStream } from 'web-streams-polyfill'
+
 import { CompressorFactory, DuplexStream, InputStream, OutputStream } from '../native/streams.nitro'
 
 export const toReadableStream = (inputStream: InputStream) => {
@@ -76,3 +78,5 @@ export class CompressionStream implements globalThis.CompressionStream {
     this.writable = writable
   }
 }
+
+export { ReadableStream, TransformStream, WritableStream }
diff --git a/packages/react-native-fast-io/src/w3c/text.ts b/packages/react-native-fast-io/src/w3c/text.ts
new file mode 100644
index 0000000..34d709c
--- /dev/null
+++ b/packages/react-native-fast-io/src/w3c/text.ts
@@ -0,0 +1,3 @@
+export { TextDecoder } from '@bacons/text-decoder'
+
+export const TextEncoder = globalThis.TextEncoder