diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 0359f86..7230b35 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -8,6 +8,7 @@ RUN npm ci
 COPY . .
 
 ENV VITE_API_BASE_URL=/api
+ENV VITE_SOCKET_URL=/socket.io
 RUN npm run build
 
 FROM nginx:alpine
diff --git a/frontend/src/lib/socket.ts b/frontend/src/lib/socket.ts
index d9f88c6..d99657a 100644
--- a/frontend/src/lib/socket.ts
+++ b/frontend/src/lib/socket.ts
@@ -12,8 +12,9 @@ class SocketService {
     if (this.socket && this.socket.connected) {
       return this.socket;
     }
-
-    this.socket = io('http://localhost:3000', {
+    const socketUrl =
+      import.meta.env.VITE_SOCKET_URL || 'http://localhost:3000';
+    this.socket = io(socketUrl, {
       auth: {
         token,
       },