diff --git a/js/plugins/drupalentity/plugin.js b/js/plugins/drupalentity/plugin.js
index 6c76bf8..f089428 100644
--- a/js/plugins/drupalentity/plugin.js
+++ b/js/plugins/drupalentity/plugin.js
@@ -83,8 +83,8 @@
       // Register the entity embed widget.
       editor.widgets.add('drupalentity', {
         // Minimum HTML which is required by this widget to work.
-        allowedContent: 'drupal-entity[*]',
-        requiredContent: 'drupal-entity[*]',
+        allowedContent: 'drupal-entity[data-entity-type,data-entity-uuid,data-entity-embed-display,data-entity-embed-settings]',
+        requiredContent: 'drupal-entity[data-entity-type,data-entity-uuid,data-entity-embed-display,data-entity-embed-settings]',
 
         // Simply recognize the element as our own. The inner markup if fetched
         // and inserted the init() callback, since it requires the actual DOM