diff --git a/es6/time-stamp.js b/es6/time-stamp.js
index 28f8ebe..70558c5 100644
--- a/es6/time-stamp.js
+++ b/es6/time-stamp.js
@@ -33,7 +33,7 @@ export default (Model, bootOptions = {}) => {
   Model.defineProperty(options.createdAt, {
     type: Date,
     required: options.required,
-    defaultFn: 'now',
+    default: new Date(),
   });
 
   Model.defineProperty(options.updatedAt, {