diff --git a/backend/src/config/env.validation.ts b/backend/src/config/env.validation.ts
index 578deac..c353f95 100644
--- a/backend/src/config/env.validation.ts
+++ b/backend/src/config/env.validation.ts
@@ -111,7 +111,7 @@ export const envValidationSchema = Joi.object({
     .description('مفتاح Google Gemini API'),
 
   GEMINI_MODEL: Joi.string()
-    .default('gemini-2.0-flash-lite')
+    .default('gemini-flash-lite-latest')
     .description('نموذج Gemini المستخدم'),
 
   // ── File Storage ───────────────────────────────────────