diff --git a/src/crafty.js b/src/crafty.js
index 51c27016..109b5574 100644
--- a/src/crafty.js
+++ b/src/crafty.js
@@ -1,5 +1,5 @@
 // Define common features
-var Crafty = require('./crafty-common.js')();
+let Crafty = require('./crafty-common.js')();
 
 // Define features only available in browser environment