diff --git a/packages/ui/src/components/chat/ChatContainer.tsx b/packages/ui/src/components/chat/ChatContainer.tsx
index b3efa2f8..a38e313a 100644
--- a/packages/ui/src/components/chat/ChatContainer.tsx
+++ b/packages/ui/src/components/chat/ChatContainer.tsx
@@ -480,7 +480,7 @@ const ReadOnlyPromptBanner: React.FC = () => {
     return (
         <div className="w-full py-3">
             <div className="chat-input-column">
-                <div className="rounded-2xl border border-border/70 bg-[var(--surface-background)] px-4 py-3 typography-ui-label text-muted-foreground">
+                <div className="rounded-2xl border border-border/70 bg-[var(--surface-background)] px-4 py-3 text-center typography-ui-label text-muted-foreground">
                     {t('chat.container.readOnlySubagentPromptBanner')}
                 </div>
             </div>