diff --git a/.jshintrc b/.jshintrc
index f6e72836..e81b5734 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -1,4 +1,4 @@
 {
     "node": true,
-    "esnext": true
+    "esversion": 6
 }
diff --git a/src/BundleManager.js b/src/BundleManager.js
index 734fded7..bedcd4f6 100644
--- a/src/BundleManager.js
+++ b/src/BundleManager.js
@@ -1,3 +1,4 @@
+/*jshint node: true, esversion: 6 */
 'use strict';
 
 const fs = require('fs'),