diff --git a/docs/reveal.js-3.1.0/package.json b/docs/reveal.js-3.1.0/package.json
index 201c6bf..a314eb3 100644
--- a/docs/reveal.js-3.1.0/package.json
+++ b/docs/reveal.js-3.1.0/package.json
@@ -24,7 +24,7 @@
   "dependencies": {
     "underscore": "~1.5.1",
     "express": "~2.5.9",
-    "mustache": "~0.7.2",
+    "mustache": "~4.0.1",
     "socket.io": "~0.9.16"
   },
   "devDependencies": {