diff --git a/pay/pay_by_join_bank_card.go b/pay/pay_by_join_bank_card.go
index bdaeacb..3edf8e2 100644
--- a/pay/pay_by_join_bank_card.go
+++ b/pay/pay_by_join_bank_card.go
@@ -40,6 +40,7 @@ func GetSms(pubKey, platformKey, priKey, mch_no string, args map[string]string)
 	args["id_no"] = AesEncryptECB([]byte(args["id_no"]), []byte(param["sec_key"]))
 	args["bank_card_no"] = AesEncryptECB([]byte(args["bank_card_no"]), []byte(param["sec_key"]))
 	args["mobile_no"] = AesEncryptECB([]byte(args["mobile_no"]), []byte(param["sec_key"]))
+	args["expire_date"] = AesEncryptECB([]byte(args["expire_date"]), []byte(param["sec_key"]))
 	data, _ := json.Marshal(args)
 	param["data"] = string(data)
 	send, err := Send("fastPay.agreement.signSms", platformKey, priKey, param)