diff --git a/web/app/components/workflow/panel/debug-and-preview/user-input.tsx b/web/app/components/workflow/panel/debug-and-preview/user-input.tsx
index 19959cef2d..08a7708fc0 100644
--- a/web/app/components/workflow/panel/debug-and-preview/user-input.tsx
+++ b/web/app/components/workflow/panel/debug-and-preview/user-input.tsx
@@ -35,7 +35,7 @@ const UserInput = () => {
   return (
     <div
       className={`
-        rounded-xl border
+        relative rounded-xl border z-[1]
         ${!expanded ? 'bg-indigo-25 border-indigo-100 shadow-none' : 'bg-white shadow-xs border-transparent'}
       `}
     >