diff --git a/src/CosAdapter.php b/src/CosAdapter.php
index 4d6a814..cd8f4d6 100644
--- a/src/CosAdapter.php
+++ b/src/CosAdapter.php
@@ -21,7 +21,6 @@
 use League\Flysystem\Visibility;
 use Overtrue\CosClient\BucketClient;
 use Overtrue\CosClient\Exceptions\ClientException;
-use Overtrue\CosClient\Exceptions\InvalidConfigException;
 use Overtrue\CosClient\ObjectClient;
 use TheNorthMemory\Xml\Transformer;