diff --git a/src/Html.php b/src/Html.php
index 9e47406a3c7..556ca79afdb 100644
--- a/src/Html.php
+++ b/src/Html.php
@@ -3897,6 +3897,8 @@ public static function initEditorSystem($id, $rand = '', $display = true, $reado
 
             // init editor
             tinyMCE.init(Object.assign({
+               license_key: 'gpl',
+
                link_default_target: '_blank',
                branding: false,
                selector: '#{$id}',