diff --git a/src/lib/engine/monitor.ts b/src/lib/engine/monitor.ts
index c2c68a8..81659ab 100644
--- a/src/lib/engine/monitor.ts
+++ b/src/lib/engine/monitor.ts
@@ -154,7 +154,7 @@ async function executeAction(
             bid_amount: 5000, // Fixed 50 BRL bid cap for safety
             targeting: { geo_locations: { countries: ['BR'] } },
             page_id: '123456789', // requires a valid page_id in production
-            image_url: imageUrl,
+            image_urls: [imageUrl],
             link: 'https://seusite.com.br',
             headline: copy.headline || 'Nova Oferta Irresistível',
             primary_text: copy.primary_text || 'Descubra como transformar seus resultados hoje mesmo.',