diff --git a/src/request/InitCheckoutPaymentRequest.ts b/src/request/InitCheckoutPaymentRequest.ts
index d30b40a..d6ec032 100644
--- a/src/request/InitCheckoutPaymentRequest.ts
+++ b/src/request/InitCheckoutPaymentRequest.ts
@@ -23,6 +23,7 @@ type InitCheckoutPaymentRequest = BaseRequest & {
   conversationId?: string;
   externalId?: string;
   orderId?: string;
+  basketIdentifier?: string;
   cardUserKey?: string;
   callbackUrl: string;
   clientIp?: string;