diff --git a/wchat/wx/SecCheck.php b/wchat/wx/SecCheck.php
index cbef251..2dd17fe 100644
--- a/wchat/wx/SecCheck.php
+++ b/wchat/wx/SecCheck.php
@@ -35,7 +35,7 @@ class SecCheck extends SmallProgram
 		$this->request->setHeader('Content-Type', 'multipart/form-data');
 		$this->request->setErrorField('errcode');
 		$this->request->setErrorMsgField('errmsg');
-		return $this->request->post($this->_url . $this->config->getAccessToken(), ['media' => new \CURLFile($path)]);
+		return $this->request->upload($this->_url . $this->config->getAccessToken(), ['media' => new \CURLFile($path)]);
 	}