diff --git a/qq/Notify.php b/qq/Notify.php
index e3817da..2a62e67 100644
--- a/qq/Notify.php
+++ b/qq/Notify.php
@@ -74,7 +74,7 @@ class Notify extends SmallProgram
 		unset($params['sign']);
 
 		$signType = $this->payConfig->getSignType();
-		$privateKey = $this->payConfig->getKey();
+		$privateKey = $this->payConfig->pay->qq->mchSecret;
 		$nowSign = Help::sign($params, $privateKey, $signType);
 		if ($sign === $nowSign) {
 			return true;