diff --git a/app/repository/CouponRepository.php b/app/repository/CouponRepository.php
index 96964e5..3122be4 100644
--- a/app/repository/CouponRepository.php
+++ b/app/repository/CouponRepository.php
@@ -115,7 +115,7 @@ class CouponRepository extends Repository
      * @param array $data
      * @return Coupon|Model
      */
-    public function updateCouponMainByBusinessCode(int $businessCode,array $data)
+    public function updateCouponMainByBusinessCode(string $businessCode,array $data)
     {
         return CouponMain::where("business_code",$businessCode)->update($data);
     }