diff --git a/javascripts/reveal.js/package.json b/javascripts/reveal.js/package.json
old mode 100755
new mode 100644
index fa85011..969735d
--- a/javascripts/reveal.js/package.json
+++ b/javascripts/reveal.js/package.json
@@ -12,7 +12,7 @@
 	},
 	"dependencies": {
 		"underscore" : "1.3.3",
-		"express" : "2.5.9",
+		"express" : "4.19.2",
 		"socket.io" : "0.9.6",
 		"mustache" : "0.4.0"
 	},