diff --git a/slides/20140225/package.json b/slides/20140225/package.json
index b92c0bc..681fbe5 100644
--- a/slides/20140225/package.json
+++ b/slides/20140225/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": {