diff --git a/src/components/ScrollyVideo/Debug.svelte b/src/components/ScrollyVideo/Debug.svelte
index 9b66adfe..7600672a 100644
--- a/src/components/ScrollyVideo/Debug.svelte
+++ b/src/components/ScrollyVideo/Debug.svelte
@@ -150,7 +150,7 @@
       transition:
         content-visibility 0.4s allow-discrete,
         opacity 0.4s,
-        block-size 0.4s;
+        block-size 0.4s cubic-bezier(0.87, 0, 0.13, 1);
     }
 
     &[open]::details-content {