diff --git a/package.json b/package.json
index ef9e0cc..c391f8b 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "version": "0.0.1",
   "private": true,
   "dependencies": {
-    "express": "3.x",
+    "express": "4.0.0",
     "socket.io": "*"
   }
 }
\ No newline at end of file