diff --git a/source/Ox.js b/source/Ox.js
index 1725635d..74eeb7ea 100644
--- a/source/Ox.js
+++ b/source/Ox.js
@@ -10,7 +10,7 @@
                 callback = args[args.length - 1],
                 path = getPath(),
                 regexp = /dev\/$/,
-                version;
+                version = +new Date();
 
             if (args[0] === true && regexp.test(path)) {
                 path = path.replace(regexp, 'build/');