diff --git a/package.json b/package.json
index e023ffd..621859e 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "license": "MIT",
   "version": "1.0.0",
   "dependencies": {
-    "express": "3.3.x",
+    "express": "4.17.x",
     "socket.io": "0.9.x",
     "node-uuid": "1.3.3"
   },