diff --git a/backend/database/seed.go b/backend/database/seed.go
index f0244c3..da4cfcd 100644
--- a/backend/database/seed.go
+++ b/backend/database/seed.go
@@ -282,7 +282,7 @@ func ensureWaffoPaymentGateway(db *gorm.DB) error {
 			Gateway:     "waffo",
 			Enabled:     true,
 			SandboxMode: true,
-			Currency:    "CNY",
+			Currency:    "USD",
 			Priority:    0,
 		}
 		if err := db.Create(&gw).Error; err != nil {
@@ -291,7 +291,7 @@ func ensureWaffoPaymentGateway(db *gorm.DB) error {
 	} else {
 		existing.Enabled = true
 		existing.SandboxMode = true
-		existing.Currency = "CNY"
+		existing.Currency = "USD"
 		existing.Priority = 0
 		if err := db.Save(&existing).Error; err != nil {
 			return err