diff --git a/src/js/storage.js b/src/js/storage.js
index 1216c8b6b..16c958941 100644
--- a/src/js/storage.js
+++ b/src/js/storage.js
@@ -256,7 +256,7 @@
             bin instanceof Object === false ||
             Array.isArray(bin.selectedFilterLists) === false
         ) {
-            this.assets.metadata(function(availableLists) {
+            this.assets.metadata(availableLists => {
                 this.saveSelectedFilterLists(
                     this.autoSelectRegionalFilterLists(availableLists)
                 );