diff --git a/package.json b/package.json
index 92227e63..dd3422b3 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
       "jquery"
     ],
     "parserOptions": {
-      "ecmaVersion": 3,
+      "ecmaVersion": 5,
       "sourceType": "script"
     },
     "esnext": false,