diff --git a/wchat/qq/SecCheck.php b/wchat/qq/SecCheck.php
index 501f0a2..bc3106a 100644
--- a/wchat/qq/SecCheck.php
+++ b/wchat/qq/SecCheck.php
@@ -27,7 +27,7 @@ class SecCheck extends SmallProgram
 			return $this->sendError('文件不存在', 404);
 		}
 		$this->request->setUseSwoole(false);
-		$this->request->setHeader('Content-Type', 'multipart/form-data');
+		$this->request->setHeader('Content-Type', 'multipart/form-data;charset=UTF-8');
 		$this->request->setErrorField('errCode');
 		$this->request->setErrorMsgField('errMsg');
 		return $this->request->upload($this->_url . $this->config->getAccessToken(), [