diff --git a/layouts/scripts/frame-index.js b/layouts/scripts/frame-index.js
index c75cb14..79bb1a1 100644
--- a/layouts/scripts/frame-index.js
+++ b/layouts/scripts/frame-index.js
@@ -8,10 +8,8 @@ function setupResizeListener() {
   const RESIZE_CODE = 'resize:';
 
   const resizeObserver = new ResizeObserver(entries => {
-    setTimeout(() => {
-      const height = document.body.scrollHeight;
-      window.parent.postMessage(RESIZE_CODE + JSON.stringify({height}), '*');
-    }, 200);
+    const height = document.querySelector('body > main').scrollHeight;
+    window.parent.postMessage(RESIZE_CODE + JSON.stringify({height}), '*');
   })
 
   resizeObserver.observe(document.body);