diff --git a/package.json b/package.json
index eb923e0..6ad2ed9 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "underscore": "~1.8.3",
     "express": "~4.13.3",
     "mustache": "~2.1.3",
-    "socket.io": "~1.3.7"
+    "socket.io": "~2.4.0"
   },
   "devDependencies": {
     "grunt-contrib-qunit": "~0.7.0",