diff --git a/docs/preso/plugin/multiplex/package.json b/docs/preso/plugin/multiplex/package.json
index bbed77a6..c0e57fef 100644
--- a/docs/preso/plugin/multiplex/package.json
+++ b/docs/preso/plugin/multiplex/package.json
@@ -13,7 +13,7 @@
     "express": "~4.13.3",
     "grunt-cli": "~0.1.13",
     "mustache": "~2.2.1",
-    "socket.io": "~1.3.7"
+    "socket.io": "~3.0.3"
   },
   "license": "MIT"
 }