diff --git a/frontend/src/services/api.js b/frontend/src/services/api.js
index f2357cf..4a18f29 100644
--- a/frontend/src/services/api.js
+++ b/frontend/src/services/api.js
@@ -1,4 +1,6 @@
-const API_URL = 'http://localhost:8080/api';
+// Use relative URL - works for both dev (localhost:8080) and prod (localhost)
+// Nginx proxies /api to backend
+const API_URL = '/api';
 
 class ApiError extends Error {
   constructor(message, status, data) {
diff --git a/frontend/src/services/socket.js b/frontend/src/services/socket.js
index 84c5d5a..79fe2a6 100644
--- a/frontend/src/services/socket.js
+++ b/frontend/src/services/socket.js
@@ -1,6 +1,8 @@
 import { io } from 'socket.io-client';
 
-const SOCKET_URL = 'http://localhost:8080';
+// Use current origin - works for both dev (localhost:8080) and prod (localhost)
+// Nginx proxies /socket.io to backend
+const SOCKET_URL = window.location.origin;
 
 let socket = null;