diff --git a/README.md b/README.md
index b6ce233..f19e4aa 100644
--- a/README.md
+++ b/README.md
@@ -29,12 +29,22 @@ $ composer require overtrue/flysystem-cos -vvv
 use League\Flysystem\Filesystem;
 use Overtrue\Flysystem\Cos\CosAdapter;
 
-$secretId = 'AKIDsiQzQla780mQxLLU2GJC6xxxxxxxxxx';
-$secretKey = 'b0GMH2c2NXWKxPhy7xxxxxxxxxxxx';
-$region = 'ap-guangzhou';
-$bucket = 'overtrue-123456789';
-
-$adapter = new CosAdapter($secretId, $secretKey, $bucket, $region);
+$config = [
+    'region'      => 'ap-guangzhou',
+    'credentials' => [
+        'appId'      => 1234567889, // 域名中数字部分
+        'secretId'   => 'AKIDS5jNr5NNygGxxxxxxxxxxxxxxxxxx',
+        'secretKey'  => 'NfszEWmyDqGmao0a4XS8wxxxxxxxxxxxx',
+    ],
+    'bucket'          => 'test',
+    'timeout'         => 60,
+    'connect_timeout' => 60,
+    'cdn'             => '您的 CDN 域名',
+    'scheme'          => 'https',
+    'read_from_cdn'   => false,
+];
+
+$adapter = new CosAdapter($config);
 
 $flysystem = new League\Flysystem\Filesystem($adapter);
 
diff --git a/src/CosAdapter.php b/src/CosAdapter.php
index 72bd5da..7cd915e 100644
--- a/src/CosAdapter.php
+++ b/src/CosAdapter.php
@@ -40,18 +40,11 @@ class CosAdapter extends AbstractAdapter implements CanOverwriteFiles
     /**
      * CosAdapter constructor.
      *
-     * @param string $secretId
-     * @param string $secretKey
-     * @param string $bucket
-     * @param string $region
-     * @param array  $optional
-     */
-    public function __construct($secretId, $secretKey, $bucket, $region, array $optional = [])
-    {
-        $this->config = array_merge(
-            \compact('region', 'bucket'), [
-            'credentials' => \compact('secretId', 'secretKey'),
-        ], $optional);
+     * @param array $config
+     */
+    public function __construct(array $config = [])
+    {
+        $this->config = $config;
 
         $this->setPathPrefix($this->config['cdn'] ?? '');
     }