diff --git a/wx/V3/WxV3PaymentTait.php b/wx/V3/WxV3PaymentTait.php
index ffa0a54..ff3f680 100644
--- a/wx/V3/WxV3PaymentTait.php
+++ b/wx/V3/WxV3PaymentTait.php
@@ -66,12 +66,13 @@ trait WxV3PaymentTait
 
     /**
      * @param string $orderNo
-     * @param AppConfig $config
      * @return array
      * @throws Exception
      */
-    public function searchByOutTradeNo(string $orderNo, AppConfig $config): array
+    public function searchByOutTradeNo(string $orderNo): array
     {
+        $config = $this->getPayConfig();
+
         $sign = $this->signature('POST', '/v3/pay/transactions/out-trade-no/' . $orderNo . '?mchid=' . $config->pay->wx->mchId, null);
 
         $client = $this->createClient($sign, null);