diff --git a/legacy/package.json b/legacy/package.json
index 9cbfa96d..0a081006 100644
--- a/legacy/package.json
+++ b/legacy/package.json
@@ -38,9 +38,9 @@
   "dependencies": {
     "eventsource-parser": "^0.0.5",
     "expiry-map": "^2.0.0",
+    "node-fetch": "2",
     "remark": "^14.0.2",
     "strip-markdown": "^5.0.0",
-    "undici": "^5.13.0",
     "uuid": "^9.0.0"
   },
   "devDependencies": {
diff --git a/legacy/pnpm-lock.yaml b/legacy/pnpm-lock.yaml
index fcfe515d..24fc4dc0 100644
--- a/legacy/pnpm-lock.yaml
+++ b/legacy/pnpm-lock.yaml
@@ -12,6 +12,7 @@ specifiers:
   expiry-map: ^2.0.0
   husky: ^8.0.2
   lint-staged: ^13.0.3
+  node-fetch: '2'
   npm-run-all: ^4.1.5
   ora: ^6.1.2
   prettier: ^2.8.0
@@ -22,15 +23,14 @@ specifiers:
   typedoc: ^0.23.21
   typedoc-plugin-markdown: ^3.13.6
   typescript: ^4.9.3
-  undici: ^5.13.0
   uuid: ^9.0.0
 
 dependencies:
   eventsource-parser: 0.0.5
   expiry-map: 2.0.0
+  node-fetch: 2.6.7
   remark: 14.0.2
   strip-markdown: 5.0.0
-  undici: 5.13.0
   uuid: 9.0.0
 
 devDependencies:
@@ -712,13 +712,6 @@ packages:
       load-tsconfig: 0.2.3
     dev: true
 
-  /busboy/1.6.0:
-    resolution: {integrity: sha512-8SFQbg/0hQ9xy3UNTB0YEnsNBbWfhf7RtnzpL7TkBiTBRfrQ9Fxcnz7VJsleJpyp6rVLvXiuORqjlHi5q+PYuA==}
-    engines: {node: '>=10.16.0'}
-    dependencies:
-      streamsearch: 1.1.0
-    dev: false
-
   /cac/6.7.14:
     resolution: {integrity: sha512-b6Ilus+c3RrdDk+JhLKUAQfzzgLEPy6wcXqS7f/xe1EETvsDP6GORG7SFuOs6cID5YkqchW/LXZbX5bc8j7ZcQ==}
     engines: {node: '>=8'}
@@ -2514,6 +2507,18 @@ packages:
     resolution: {integrity: sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==}
     dev: true
 
+  /node-fetch/2.6.7:
+    resolution: {integrity: sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==}
+    engines: {node: 4.x || >=6.0.0}
+    peerDependencies:
+      encoding: ^0.1.0
+    peerDependenciesMeta:
+      encoding:
+        optional: true
+    dependencies:
+      whatwg-url: 5.0.0
+    dev: false
+
   /node-releases/2.0.6:
     resolution: {integrity: sha512-PiVXnNuFm5+iYkLBNeq5211hvO38y63T0i2KKh2KnUs3RpzJ+JtODFjkD8yjLwnDkTYF1eKXheUwdssR+NRZdg==}
     dev: true
@@ -3205,11 +3210,6 @@ packages:
       escape-string-regexp: 2.0.0
     dev: true
 
-  /streamsearch/1.1.0:
-    resolution: {integrity: sha512-Mcc5wHehp9aXz1ax6bZUyY5afg9u2rv5cqQI3mRrYkGC8rW2hM02jWuwjtL++LS5qinSyhj2QfLyNsuc+VsExg==}
-    engines: {node: '>=10.0.0'}
-    dev: false
-
   /string-argv/0.3.1:
     resolution: {integrity: sha512-a1uQGz7IyVy9YwhqjZIZu1c8JO8dNIe20xBmSS6qu9kv++k3JGzCVmprbNN5Kn+BgzD5E7YYwg1CcjuJMRNsvg==}
     engines: {node: '>=0.6.19'}
@@ -3382,6 +3382,10 @@ packages:
       is-number: 7.0.0
     dev: true
 
+  /tr46/0.0.3:
+    resolution: {integrity: sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==}
+    dev: false
+
   /tr46/1.0.1:
     resolution: {integrity: sha512-dTpowEjclQ7Kgx5SdBkqRzVhERQXov8/l9Ft9dVM9fmg0W0KQSVaXX9T4i6twCPNtYiZM53lpSSUAwJbFPOHxA==}
     dependencies:
@@ -3518,13 +3522,6 @@ packages:
       which-boxed-primitive: 1.0.2
     dev: true
 
-  /undici/5.13.0:
-    resolution: {integrity: sha512-UDZKtwb2k7KRsK4SdXWG7ErXiL7yTGgLWvk2AXO1JMjgjh404nFo6tWSCM2xMpJwMPx3J8i/vfqEh1zOqvj82Q==}
-    engines: {node: '>=12.18'}
-    dependencies:
-      busboy: 1.6.0
-    dev: false
-
   /unified/10.1.2:
     resolution: {integrity: sha512-pUSWAi/RAnVy1Pif2kAoeWNBa3JVrx0MId2LASj8G+7AiHWoKZNTomq6LG326T68U7/e263X6fTdcXIy7XnF7Q==}
     dependencies:
@@ -3630,6 +3627,10 @@ packages:
       defaults: 1.0.4
     dev: true
 
+  /webidl-conversions/3.0.1:
+    resolution: {integrity: sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==}
+    dev: false
+
   /webidl-conversions/4.0.2:
     resolution: {integrity: sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==}
     dev: true
@@ -3639,6 +3640,13 @@ packages:
     engines: {node: '>=6'}
     dev: true
 
+  /whatwg-url/5.0.0:
+    resolution: {integrity: sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==}
+    dependencies:
+      tr46: 0.0.3
+      webidl-conversions: 3.0.1
+    dev: false
+
   /whatwg-url/7.1.0:
     resolution: {integrity: sha512-WUu7Rg1DroM7oQvGWfOiAK21n74Gg+T4elXEQYkOhtyLeWiJFoOGLXPKI/9gzIie9CtwVLm8wtw6YJdKyxSjeg==}
     dependencies:
diff --git a/legacy/src/demo.ts b/legacy/src/demo.ts
index 7560c9f4..7bae4db4 100644
--- a/legacy/src/demo.ts
+++ b/legacy/src/demo.ts
@@ -7,6 +7,10 @@ dotenv.config()
 
 /**
  * Example CLI for testing functionality.
+ *
+ * ```
+ * npx tsx src/demo.ts
+ * ```
  */
 async function main() {
   const api = new ChatGPTAPI({ sessionToken: process.env.SESSION_TOKEN })
diff --git a/legacy/src/fetch-sse.ts b/legacy/src/fetch-sse.ts
index 15f2a54d..3a0b585b 100644
--- a/legacy/src/fetch-sse.ts
+++ b/legacy/src/fetch-sse.ts
@@ -1,7 +1,8 @@
 import { createParser } from 'eventsource-parser'
 
 import { fetch } from './fetch'
-import { streamAsyncIterable } from './stream-async-iterable'
+
+// import { streamAsyncIterable } from './stream-async-iterable'
 
 export async function fetchSSE(
   url: string,
@@ -15,8 +16,16 @@ export async function fetchSSE(
     }
   })
 
-  for await (const chunk of streamAsyncIterable(resp.body)) {
-    const str = new TextDecoder().decode(chunk)
-    parser.feed(str)
-  }
+  resp.body.on('readable', () => {
+    let chunk: string | Buffer
+    while (null !== (chunk = resp.body.read())) {
+      parser.feed(chunk.toString())
+    }
+  })
+
+  // TODO: add support for web-compatible `fetch`
+  // for await (const chunk of streamAsyncIterable(resp.body)) {
+  //   const str = new TextDecoder().decode(chunk)
+  //   parser.feed(str)
+  // }
 }
diff --git a/legacy/src/fetch.ts b/legacy/src/fetch.ts
index 63555d68..fe659655 100644
--- a/legacy/src/fetch.ts
+++ b/legacy/src/fetch.ts
@@ -1,3 +1,3 @@
-import { fetch } from 'undici'
+import fetch from 'node-fetch'
 
 export { fetch }