diff --git a/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/templates/account/email.html b/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/templates/account/email.html
index 8b4669bb..2b7e1278 100644
--- a/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/templates/account/email.html
+++ b/{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/templates/account/email.html
@@ -62,17 +62,17 @@
 {% block inline_javascript %}
 {{ block.super }}
 <script type="text/javascript">
-(function() {
-  var message = "{% trans 'Do you really want to remove the selected e-mail address?' %}";
-  var actions = document.getElementsByName('action_remove');
+window.addEventListener('DOMContentLoaded',function() {
+  const message = "{% trans 'Do you really want to remove the selected e-mail address?' %}";
+  const actions = document.getElementsByName('action_remove');
   if (actions.length) {
     actions[0].addEventListener("click", function(e) {
-      if (! confirm(message)) {
+      if (!confirm(message)) {
         e.preventDefault();
       }
     });
   }
-})();
+});
 
 $('.form-group').removeClass('row');
 </script>