diff --git a/v3/codeopticon/server/package.json b/v3/codeopticon/server/package.json
index 0f6e5d1e5..ab63d19e5 100644
--- a/v3/codeopticon/server/package.json
+++ b/v3/codeopticon/server/package.json
@@ -4,6 +4,6 @@
   "description": "Codeopticon server",
   "dependencies": {
     "express": "~4.10.2",
-    "socket.io": "~1.3.2"
+    "socket.io": "~2.1.0"
   }
 }