diff --git a/template/slides/reveal/plugin/multiplex/package.json b/template/slides/reveal/plugin/multiplex/package.json
index 3eac5e1..b0286d1 100644
--- a/template/slides/reveal/plugin/multiplex/package.json
+++ b/template/slides/reveal/plugin/multiplex/package.json
@@ -10,7 +10,7 @@
     "node": "~4.1.1"
   },
   "dependencies": {
-    "express": "4.13.4",
+    "express": "4.20.0",
     "grunt-cli": "0.1.13",
     "mustache": "2.2.1",
     "socket.io": "1.3.7"