diff --git a/app/(dashboard)/dashboard/shop/page.tsx b/app/(dashboard)/dashboard/shop/page.tsx
index 7cbb87a..959c303 100644
--- a/app/(dashboard)/dashboard/shop/page.tsx
+++ b/app/(dashboard)/dashboard/shop/page.tsx
@@ -131,7 +131,7 @@ export default function ShopManagementPage() {
                   if (next === null) return
                   const value = next.trim()
                   if (!value) return
-                  const index = shop.announcements.findIndex((item) => item === announcement)
+                  const index = shop.announcements.indexOf(announcement)
                   if (index < 0) return
                   updateAnnouncement(shop.id, index, value)
                 }}