diff --git a/config/chatSocket.ts b/config/chatSocket.ts
index 93f2706..c6f40bc 100644
--- a/config/chatSocket.ts
+++ b/config/chatSocket.ts
@@ -11,4 +11,7 @@ const resolveChatSocketUrl = (raw?: string): string => {
 }
 
 export const CHAT_SOCKET_URL = resolveChatSocketUrl(process.env.NEXT_PUBLIC_API_URL)
+/** Socket.IO namespace (logical channel). */
 export const CHAT_SOCKET_NAMESPACE = '/chat'
+/** Engine.IO transport path — appears as `wss://host/chat/...` (not `/socket.io`). */
+export const CHAT_SOCKET_PATH = '/chat'
diff --git a/hooks/useAdminChatSocket.ts b/hooks/useAdminChatSocket.ts
index 6c618a6..5690c85 100644
--- a/hooks/useAdminChatSocket.ts
+++ b/hooks/useAdminChatSocket.ts
@@ -3,7 +3,7 @@
 import { useEffect, useRef, useState } from 'react'
 import { io } from 'socket.io-client'
 
-import { CHAT_SOCKET_NAMESPACE, CHAT_SOCKET_URL } from '@/config/chatSocket'
+import { CHAT_SOCKET_NAMESPACE, CHAT_SOCKET_PATH, CHAT_SOCKET_URL } from '@/config/chatSocket'
 import useAuth from '@/hooks/useAuth'
 import { reportBrowserEvent } from '@/lib/observability/client'
 import type { AdminChatMessage } from '@/services/adminChat'
@@ -34,6 +34,7 @@ const useAdminChatSocket = (conversationId: string, onMessage: (message: AdminCh
     let disconnectTimer: ReturnType<typeof setTimeout> | undefined
     let retryTimer: ReturnType<typeof setTimeout> | undefined
     const socket = io(`${CHAT_SOCKET_URL}${CHAT_SOCKET_NAMESPACE}`, {
+      path: CHAT_SOCKET_PATH,
       transports: ['websocket'],
       autoConnect: true,
       auth: { token: user.accessToken },
diff --git a/next.config.js b/next.config.js
index 81fb8b4..ace8c32 100644
--- a/next.config.js
+++ b/next.config.js
@@ -140,8 +140,12 @@ const nextConfig = {
         destination: `${apiProxyTarget}/api/v1/:path*`,
       },
       {
-        source: '/socket.io/:path*',
-        destination: `${apiProxyTarget}/socket.io/:path*`,
+        source: '/chat',
+        destination: `${apiProxyTarget}/chat`,
+      },
+      {
+        source: '/chat/:path*',
+        destination: `${apiProxyTarget}/chat/:path*`,
       },
     ]
   },
diff --git a/proxy.ts b/proxy.ts
index 72ce3f8..4e55937 100644
--- a/proxy.ts
+++ b/proxy.ts
@@ -83,7 +83,7 @@ export default function proxy(request: NextRequest) {
 
   const { pathname, searchParams } = request.nextUrl
 
-  if (pathname === '/api' || pathname.startsWith('/api/') || pathname === '/socket.io' || pathname.startsWith('/socket.io/')) {
+  if (pathname === '/api' || pathname.startsWith('/api/') || pathname === '/chat' || pathname.startsWith('/chat/')) {
     if (!shouldStripForwardedBrowserOrigin()) {
       return NextResponse.next()
     }
@@ -163,5 +163,5 @@ export default function proxy(request: NextRequest) {
 }
 
 export const config = {
-  matcher: ['/api/:path*', '/socket.io/:path*', '/((?!_next|_vercel|.*\\..*).*)'],
+  matcher: ['/api/:path*', '/chat', '/chat/:path*', '/((?!_next|_vercel|.*\\..*).*)'],
 }