diff --git a/config/sync/editor.editor.wysiwyg.yml b/config/sync/editor.editor.wysiwyg.yml
index 30e5ee9..734e25e 100644
--- a/config/sync/editor.editor.wysiwyg.yml
+++ b/config/sync/editor.editor.wysiwyg.yml
@@ -36,6 +36,7 @@ settings:
       enabled_optional_attributes:
         - height
         - width
+        - allowfullscreen
         - allow
     linkit_extension:
       linkit_enabled: true