diff --git a/package.json b/package.json
index dfc489d..dacb1f2 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,6 @@
     "ejs": "^2.5.1",
     "express": "^4.14.0",
     "nexmo": "^1.0.0-beta-7",
-    "socket.io": "^1.4.8"
+    "socket.io": "^4.8.0"
   }
 }