diff --git a/partnerapi/kiotviet/model_req.go b/partnerapi/kiotviet/model_req.go
index 1fe10f1..30bca8b 100644
--- a/partnerapi/kiotviet/model_req.go
+++ b/partnerapi/kiotviet/model_req.go
@@ -48,7 +48,7 @@ type WebhookBody struct {
 
 type WebhookNotification struct {
 	Action string                   `json:"Action"`
-	Data   []WebhookStockUpdateData `json:"data"`
+	Data   []WebhookStockUpdateData `json:"Data"`
 }
 
 type WebhookStockUpdateData struct {