diff --git a/Show_metacritic_ratings.user.js b/Show_metacritic_ratings.user.js
index ea21535..5c8fdd1 100644
--- a/Show_metacritic_ratings.user.js
+++ b/Show_metacritic_ratings.user.js
@@ -100,6 +100,7 @@
 // ==/UserScript==
 
 /* globals alert, confirm, GM, DOMParser, $, Image, unsafeWindow, parent, Blob, failedImages */
+/* jshint asi: true, esversion: 8 */
 
 const scriptName = 'Show Metacritic.com ratings'