diff --git a/app/package.json b/app/package.json
index 7eb792b..370d870 100644
--- a/app/package.json
+++ b/app/package.json
@@ -5,7 +5,7 @@
   "version": "0.0.1",
   "dependencies": {
     "connect": "1.8.5",
-    "express": "2.5.2",
+    "express": "4.17.1",
     "jade": "0.20.0",
     "mongoose": "2.4.8",
     "socket.io": "0.8.7"