diff --git a/app/Http/Controllers/BillplzTransactionReviewController.php b/app/Http/Controllers/BillplzTransactionReviewController.php
index 5160b32..8bc8979 100644
--- a/app/Http/Controllers/BillplzTransactionReviewController.php
+++ b/app/Http/Controllers/BillplzTransactionReviewController.php
@@ -18,12 +18,13 @@ class BillplzTransactionReviewController extends Controller
             'KOPKB',
         ];
 
-        $billplzTransactionReview = array_map(function($company_code) use($date){
+        $billplzTransactionReview = array_reduce($companyMapping, function($carry, $company_code) use($date){
             $billplzService = new BillplzService($company_code);
-            return $billplzService->getBillplzTransactionReview($date)->toArray();
-        }, $companyMapping);
+            $carry[$company_code] = $billplzService->getBillplzTransactionReview($date)->toArray();
+            return $carry;
+        }, []);
         
-        return response()->json(array_merge(...$billplzTransactionReview), 200);
+        return response()->json($billplzTransactionReview, 200);
     }
     
     public function show(Request $request)