diff --git a/contao/templates/frontend_widget/components/tiny_mce.html.twig b/contao/templates/frontend_widget/components/tiny_mce.html.twig
index 52363f1..1f5e25d 100644
--- a/contao/templates/frontend_widget/components/tiny_mce.html.twig
+++ b/contao/templates/frontend_widget/components/tiny_mce.html.twig
@@ -3,6 +3,7 @@
 <script>
     window.tinymce && tinymce.init({
         selector: '#{{ selector }}',
+        license_key: 'gpl',
         language: '{{ language }}',
         element_format: 'html',
         document_base_url: '{{ base }}',