diff --git a/partnerapi/kiotviet/const.go b/partnerapi/kiotviet/const.go
index 1ae36d3..e537320 100644
--- a/partnerapi/kiotviet/const.go
+++ b/partnerapi/kiotviet/const.go
@@ -13,3 +13,13 @@ const (
 	baseURLProd      = "https://public.kiotapi.com"
 	baseURLTokenProd = "https://id.kiotviet.vn"
 )
+
+const (
+	WebhookTypeCustomerUpdate = "customer.update"
+	WebhookTypeCustomerDelete = "customer.delete"
+	WebhookTypeProductUpdate  = "product.update"
+	WebhookTypeProductDelete  = "product.delete"
+	WebhookTypeStockUpdate    = "stock.update"
+	WebhookTypeOrderUpdate    = "order.update"
+	WebhookTypeInvoiceUpdate  = "invoice.update"
+)