diff --git a/qyweixin/app_customer.go b/qyweixin/app_customer.go
index 2d4c9e1..eb44553 100644
--- a/qyweixin/app_customer.go
+++ b/qyweixin/app_customer.go
@@ -65,7 +65,7 @@ func (a *AppCustomer) SendCustomerText(toUser, openKfId, content string) error {
 	params := make(map[string]interface{})
 	params["touser"] = toUser
 	params["open_kfid"] = openKfId
-	params["msg_type"] = "text"
+	params["msgtype"] = "text"
 	params["text"] = map[string]interface{}{
 		"content": content,
 	}