diff --git a/revealjs/package.json b/revealjs/package.json
old mode 100755
new mode 100644
index 5debdd2..409fef0
--- a/revealjs/package.json
+++ b/revealjs/package.json
@@ -23,7 +23,7 @@
   "dependencies": {
     "underscore": "~1.5.1",
     "express": "~2.5.9",
-    "mustache": "~0.7.2",
+    "mustache": "~4.0.0",
     "socket.io": "~0.9.13"
   },
   "devDependencies": {