diff --git a/src/modules/Coupon/coupon.service.ts b/src/modules/Coupon/coupon.service.ts
index 74dd195..ba1460b 100644
--- a/src/modules/Coupon/coupon.service.ts
+++ b/src/modules/Coupon/coupon.service.ts
@@ -209,6 +209,7 @@ class CouponService {
       cartShipmentItem.totalCouponDiscount = discount;
       cartShipmentItem.totalPaymentPrice = cartShipmentItem.totalPaymentPrice - discount;
       userCart.coupon_discount = discount;
+      userCart.total_discount += discount;
       coupon.usageCount += 1;
 
       await validCartShipmentItem.save({ session });