diff --git a/wchat/wx/Account.php b/wchat/wx/Account.php
index 0fe6cf6..a02593d 100644
--- a/wchat/wx/Account.php
+++ b/wchat/wx/Account.php
@@ -49,7 +49,7 @@ class Account extends SmallProgram
 		$param['grant_type'] = 'authorization_code';
 
 		$this->request->setMethod(HttpClient::GET);
-		$this->request->addHeader('Content-Type', 'text/xml');
+		$this->request->addHeader('Content-Type', 'application/json');
 		$this->request->setErrorField('errcode');
 		$this->request->setErrorMsgField('errmsg');