diff --git a/app/Endpoint/Api/Http/Controllers/Dealer/OrderController.php b/app/Endpoint/Api/Http/Controllers/Dealer/OrderController.php
index fa4b8145..72f9e5b9 100644
--- a/app/Endpoint/Api/Http/Controllers/Dealer/OrderController.php
+++ b/app/Endpoint/Api/Http/Controllers/Dealer/OrderController.php
@@ -139,7 +139,7 @@ class OrderController extends Controller
         $input = $request->validate([
             'pay_image' => ['bail', 'string'],
         ]);
-        $orderService->payOrder($order, $input['pay_image']);
+        $orderService->payOrder($order, $input['pay_image'] ?? null);
         return response()->noContent();
     }