diff --git a/src/app/api/integrations/metrics/daily/route.ts b/src/app/api/integrations/metrics/daily/route.ts
index c9a2c2e..0002937 100644
--- a/src/app/api/integrations/metrics/daily/route.ts
+++ b/src/app/api/integrations/metrics/daily/route.ts
@@ -27,7 +27,7 @@ export async function POST(req: NextRequest) {
   const adminClient = createClient(supabaseUrl, serviceRoleKey);
 
   // 1. Recoger meta_ad_ids únicos de las métricas entrantes
-  const metaAdIds = Array.from(new Set(rows.map((r: any) => r.meta_ad_id).filter(Boolean)));
+  const metaAdIds: string[] = Array.from(new Set(rows.map((r: any) => String(r.meta_ad_id)).filter(Boolean)));
 
   if (!metaAdIds.length) {
     return NextResponse.json({ error: 'Rows must include meta_ad_id' }, { status: 400 });