diff --git a/wchat/common/HttpClient.php b/wchat/common/HttpClient.php
index c25022b..275eaac 100644
--- a/wchat/common/HttpClient.php
+++ b/wchat/common/HttpClient.php
@@ -624,6 +624,7 @@ class HttpClient
 	public function upload($url, $params)
 	{
 		try {
+			$this->method = self::POST;
 			$output = $this->curlParse($url, $params);
 			if ($output === FALSE) {
 				return new Result(['code' => 500, 'message' => $output]);