diff --git a/plugins/tasklist/tasklist.js b/plugins/tasklist/tasklist.js
index a4951e2a..9060817f 100644
--- a/plugins/tasklist/tasklist.js
+++ b/plugins/tasklist/tasklist.js
@@ -213,6 +213,9 @@ function rcube_tasklist_ui(settings)
 
         // Make Elastic checkboxes pretty
         if (window.UI && UI.pretty_checkbox) {
+            $(rcmail.gui_objects.tasklistslist).find('input[type=checkbox]').each(function() {
+                UI.pretty_checkbox($(this).addClass('flex-checkbox'));
+            });
             tasklists_widget.addEventListener('add-item', function(prop) {
                 UI.pretty_checkbox($(prop.li).find('input').addClass('flex-checkbox'));
             });