diff --git a/presentation/plugin/multiplex/package.json b/presentation/plugin/multiplex/package.json
old mode 100755
new mode 100644
index bbed77a67..2d803792d
--- a/presentation/plugin/multiplex/package.json
+++ b/presentation/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": "~1.7.4"
   },
   "license": "MIT"
 }