diff --git a/package.json b/package.json
index 159ab8b..8049841 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   },
   "dependencies": {
     "async": "~0.2.8",
-    "express": "~3.2.4",
+    "express": "~4.17.1",
     "socket.io": "~0.9.14"
   },
   "devDependencies": {