diff --git a/static/js/selectSelectAll.js b/static/js/selectSelectAll.js
index 7a0b7eb1..a5871ee9 100644
--- a/static/js/selectSelectAll.js
+++ b/static/js/selectSelectAll.js
@@ -2,7 +2,7 @@ function selectSelectAll_click(e) {
   const ctrl = $(e.target).next()
   if (ctrl.prop('type') == 'select-multiple') {
     ctrl.find("option").each(function () {
-      $(this).attr('selected', 'selected');
+      $(this).prop('selected', true);
       ctrl.trigger("change")
     });
   }