diff --git a/backend/internal/domain/models.go b/backend/internal/domain/models.go
index 8365370..ecd504a 100644
--- a/backend/internal/domain/models.go
+++ b/backend/internal/domain/models.go
@@ -283,6 +283,7 @@ type PaymentWebhookEvent struct {
 	PaymentID       string    `json:"payment_id"`
 	OrderID         uuid.UUID `json:"order_id"`
 	Status          string    `json:"status"`
+	Gateway         string    `json:"gateway"`
 	MarketplaceFee  int64     `json:"marketplace_fee"`
 	SellerAmount    int64     `json:"seller_amount"`
 	TotalPaidAmount int64     `json:"total_paid_amount"`