diff --git a/WePayV3/Order.php b/WePayV3/Order.php
index ca7e587..5e67423 100644
--- a/WePayV3/Order.php
+++ b/WePayV3/Order.php
@@ -104,11 +104,11 @@ class Order extends BasicWePay
 
     /**
      * 支付通知解析
-     * @param array $data
+     * @param array|null $data
      * @return array
      * @throws \WeChat\Exceptions\InvalidDecryptException
      */
-    public function notify(array $data = [])
+    public function notify($data = [])
     {
         if (empty($data)) {
             $data = json_decode(Tools::getRawInput(), true);