diff --git a/src/modules/payments/gateways/zarinpal.gateway.ts b/src/modules/payments/gateways/zarinpal.gateway.ts
index 1c14fa5..5b26c6e 100755
--- a/src/modules/payments/gateways/zarinpal.gateway.ts
+++ b/src/modules/payments/gateways/zarinpal.gateway.ts
@@ -47,6 +47,7 @@ export class ZarinpalGateway implements IPaymentGateway {
       merchant_id: merchantId,
       description: `Payment for order #${orderId}`,
       callback_url: callbackUrl,
+      currency: 'IRT',
       metadata: {
         order_id: orderId,
       },
diff --git a/src/modules/payments/interface/gateway.ts b/src/modules/payments/interface/gateway.ts
index cb6c786..f336f2c 100644
--- a/src/modules/payments/interface/gateway.ts
+++ b/src/modules/payments/interface/gateway.ts
@@ -39,6 +39,7 @@ export interface IZarinpalRequestPayment {
     email?: string;
   };
   referrer_id?: string;
+  currency: 'IRT';
 }
 export interface IZarinpalPaymentResponse {
   data: {