diff --git a/embed.js b/embed.js
index 47335e1..a954d61 100644
--- a/embed.js
+++ b/embed.js
@@ -5,5 +5,7 @@
     return
   }
 
-  document.querySelector('body').classList.add('is-embeded')
+  window.addEventListener('DOMContentLoaded', () => {
+    window.document.querySelector('body').classList.add('is-embeded')
+  })
 })();