diff --git a/wx/Notify.php b/wx/Notify.php
index c407eaa..3aa2c98 100644
--- a/wx/Notify.php
+++ b/wx/Notify.php
@@ -82,7 +82,9 @@ class Notify extends Miniprogarampage
 		$sign = $params['sign'];
 		unset($params['sign']);
 
-		$nowSign = Help::sign($params, $this->config->getKey(), $sign['sign_type']);
+		$signType = $this->config->getSignType();
+		$privateKey = $this->config->getKey();
+		$nowSign = Help::sign($params, $privateKey, $signType);
 		if ($sign === $nowSign) {
 			return true;
 		}