diff --git a/src/QiNiu/Auth.php b/src/QiNiu/Auth.php
index 46662be..effa03b 100644
--- a/src/QiNiu/Auth.php
+++ b/src/QiNiu/Auth.php
@@ -182,7 +182,7 @@ public function authorizationV2($url, $method, $body = null, $contentType = null
         }
 
         $sign = $this->sign($toSignStr);
-        $auth = 'EasySwoole\Oss\QiNiu ' . $sign;
+        $auth = 'Qiniu ' . $sign;
         return array('Authorization' => $auth);
     }
 }