diff --git a/erp/purchase.go b/erp/purchase.go
index 60a8286..b59bd07 100644
--- a/erp/purchase.go
+++ b/erp/purchase.go
@@ -39,6 +39,7 @@ type PurchaseItem struct {
 	SaleId          int64           `json:"saleId"`
 	PiSerial        string          `json:"piSerial"`
 	PoSerial        string          `json:"poSerial"`
+	BatchNo         int64           `json:"batchNo"`
 	Remark          string          `json:"remark"`
 	CustomName      string          `json:"customName"`
 	CustomShortName string          `json:"customShortName"`
@@ -111,6 +112,7 @@ type ReplyPurchaseInfo struct {
 	AdvancePayment  *decimal.Decimal `json:"advancePayment"`
 	PoSerial        string           `json:"poSerial"`
 	PiSerial        string           `json:"piSerial"`
+	BatchNo         int64            `json:"batchNo"`
 	Remark          string           `json:"remark"`
 	WorkflowId      int64            `json:"workflowId"`
 	WorkflowStatus  int64            `json:"workflowStatus"`