diff --git a/web/app/components/base/chat/chat/citation/popup.tsx b/web/app/components/base/chat/chat/citation/popup.tsx
index ee0a225bac..ef3a48c7f6 100644
--- a/web/app/components/base/chat/chat/citation/popup.tsx
+++ b/web/app/components/base/chat/chat/citation/popup.tsx
@@ -53,7 +53,7 @@ const Popup: FC<PopupProps> = ({
         </div>
       </PortalToFollowElemTrigger>
       <PortalToFollowElemContent style={{ zIndex: 1000 }}>
-        <div className='max-w-[360px] rounded-xl bg-background-section-burn shadow-lg'>
+        <div className='max-w-[360px] rounded-xl bg-background-section-burn shadow-lg backdrop-blur-[5px]'>
           <div className='px-4 pb-2 pt-3'>
             <div className='flex h-[18px] items-center'>
               <FileIcon type={fileType} className='mr-1 h-4 w-4 shrink-0' />