diff --git a/backend/src/database/migrations/025_create_announcement_banners.sql b/backend/src/database/migrations/025_create_announcement_banners.sql
index 4b575a2..0090c3f 100644
--- a/backend/src/database/migrations/025_create_announcement_banners.sql
+++ b/backend/src/database/migrations/025_create_announcement_banners.sql
@@ -10,5 +10,5 @@ CREATE TABLE IF NOT EXISTS announcement_banners (
   created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
 
-CREATE INDEX idx_banners_active ON announcement_banners (starts_at, ends_at)
-  WHERE ends_at IS NULL OR ends_at > NOW();
+CREATE INDEX idx_banners_starts_at ON announcement_banners (starts_at);
+CREATE INDEX idx_banners_ends_at ON announcement_banners (ends_at);