diff --git a/ThinkPHP/Library/Org/Kudian/Api.class.php b/ThinkPHP/Library/Org/Kudian/Api.class.php
index d054b4d..b9c1772 100644
--- a/ThinkPHP/Library/Org/Kudian/Api.class.php
+++ b/ThinkPHP/Library/Org/Kudian/Api.class.php
@@ -6,7 +6,7 @@ use Org\Kudian\Request\Request;
 
 class Api
 {
-    private $client;
+    private static $client;
 
     private static function getClient() {
         if (!self::$client) {