diff --git a/signalling/package.json b/signalling/package.json
index 219e753..97413ac 100644
--- a/signalling/package.json
+++ b/signalling/package.json
@@ -4,5 +4,5 @@
   "description": "WebRTC codelab",
   "dependencies": {
     "node-static": "0.7.7",
-    "socket.io": "3.0.0"
+    "socket.io": "4.8.0"
   }}