diff --git a/app/assets/javascripts/initializers/initializeCreditsPage.js b/app/assets/javascripts/initializers/initializeCreditsPage.js
index 9d7fb6723..c3e8e733c 100644
--- a/app/assets/javascripts/initializers/initializeCreditsPage.js
+++ b/app/assets/javascripts/initializers/initializeCreditsPage.js
@@ -1,4 +1,7 @@
 /* global localizeTimeElements */
+
+'use strict';
+
 function initializeCreditsPage() {
   const datetimes = document.querySelectorAll('.ledger time');