diff --git a/src/chatgpt-api-browser.ts b/src/chatgpt-api-browser.ts
index e9135f8..3405b1b 100644
--- a/src/chatgpt-api-browser.ts
+++ b/src/chatgpt-api-browser.ts
@@ -118,6 +118,22 @@ export class ChatGPTAPIBrowser extends AChatGPTAPI {
       this._page =
         (await this._browser.pages())[0] || (await this._browser.newPage())
 
+      if (this._proxyServer && this._proxyServer.includes('@')) {
+        const proxyUsername = this._proxyServer.split('@')[0].split(':')[0]
+        const proxyPassword = this._proxyServer.split('@')[0].split(':')[1]
+        try {
+          await this._page.authenticate({
+            username: proxyUsername,
+            password: proxyPassword
+          })
+        } catch (err) {
+          console.error(
+            `Proxy "${this._proxyServer}" throws an error at authenticating`,
+            err.toString()
+          )
+        }
+      }
+
       // bypass annoying popup modals
       this._page.evaluateOnNewDocument(() => {
         window.localStorage.setItem('oai/apps/hasSeenOnboarding/chat', 'true')
diff --git a/src/openai-auth.ts b/src/openai-auth.ts
index 16f36ec..d5bf875 100644
--- a/src/openai-auth.ts
+++ b/src/openai-auth.ts
@@ -313,7 +313,10 @@ export async function getBrowser(
   }
 
   if (proxyServer) {
-    puppeteerArgs.push(`--proxy-server=${proxyServer}`)
+    const ipPort = proxyServer.includes('@')
+      ? proxyServer.split('@')[1]
+      : proxyServer
+    puppeteerArgs.push(`--proxy-server=${ipPort}`)
   }
 
   const browser = await puppeteer.launch({