diff --git a/src/Client.php b/src/Client.php
index 0833ba3..dbc6758 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -37,7 +37,7 @@ class Client
             $this->config[$this->currentApp]);
         unset($config['secret']);
         $client = new \GuzzleHttp\Client($config);
-        $params['appid'] = $this->currentApp;
+        $params['appid'] = $config['appid'];
         $params['timestamp'] = time();
         $params['sign'] = $this->sign($params);
         $resp = $client->post($uri, ['form_params' => $params]);