diff --git a/README.md b/README.md
index 8eda96a..c541b8e 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ SDK 包含如下功能
 建议使用速度很快的国内[全量镜像](https://pkg.phpcomposer.com/#how-to-use-packagist-mirror)([又拍云赞助](https://pkg.phpcomposer.com/#donation))
 
 ```
-composer require upyun/sdk
+composer require jasonmann/upyun-sdk
 ```
 
 2.如果不适应 `composer` 管理，可以直接下载[压缩包](https://github.com/upyun/php-sdk/releases)(注意需要下载 `php-sdk-版本号.zip` 格式的 zip 压缩包，不是 Source code 源码压缩包)，解压后，项目中添加如下代码：
diff --git a/composer.json b/composer.json
index 6431520..98e27cc 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,5 @@
 {
-    "name": "upyun/sdk",
+    "name": "jasonmann/upyun-sdk",
     "description": "UPYUN sdk for php",
     "keywords": ["UPYUN", "sdk"],
     "type": "library",
@@ -7,9 +7,10 @@
     "homepage": "https://github.com/upyun/php-sdk/",
     "license": "MIT",
     "require": {
-        "php": ">=5.5.0",
+        "php": "^7.2.5 || ^8.0",
         "ext-curl": "*",
-        "guzzlehttp/guzzle": "~6.0"
+        "guzzlehttp/guzzle": "~7.0",
+        "ext-json": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.0",
@@ -38,6 +39,10 @@
         {
           "name": "sabakugaara",
           "email": "senellise@gmail.com"
+        },
+        {
+            "name": "jasonmann",
+            "email": "793650314@qq.com"
         }
     ]
 }
diff --git a/src/Upyun/Api/Rest.php b/src/Upyun/Api/Rest.php
index be4b0a0..13f16b3 100644
--- a/src/Upyun/Api/Rest.php
+++ b/src/Upyun/Api/Rest.php
@@ -47,7 +47,7 @@ public function request($method, $storagePath)
      */
     public function withFile($file)
     {
-        $stream = Psr7\stream_for($file);
+        $stream = Psr7\Utils::streamFor($file);
         $this->file = $stream;
 
         return $this;
diff --git a/src/Upyun/Api/SyncVideo.php b/src/Upyun/Api/SyncVideo.php
index 39d1972..c99732b 100644
--- a/src/Upyun/Api/SyncVideo.php
+++ b/src/Upyun/Api/SyncVideo.php
@@ -36,7 +36,7 @@ public function process($params, $path) {
             'json' => $params
         ]);
 
-        $body = $response->getBody()->getContents();
+        $body = (string)$response->getBody();
         return json_decode($body, true);
     }
-}
\ No newline at end of file
+}
diff --git a/src/Upyun/Config.php b/src/Upyun/Config.php
index 1b99b6c..97cf39e 100644
--- a/src/Upyun/Config.php
+++ b/src/Upyun/Config.php
@@ -50,7 +50,7 @@ class Config
     /**
      * @var int request timeout seconds
      */
-    public $timeout = 60;
+    public $timeout = 600;
 
 
     /**
diff --git a/src/Upyun/Signature.php b/src/Upyun/Signature.php
index 0fb68fe..a177f4b 100644
--- a/src/Upyun/Signature.php
+++ b/src/Upyun/Signature.php
@@ -73,7 +73,7 @@ public static function getPurgeSignHeader(Config $serviceConfig, $urlString)
      * @param $policy
      * @param $contentMd5 请求 body 的 md5
      *
-     * @return array
+     * @return string
      */
     public static function getBodySignature(Config $serviceConfig, $method, $uri, $date = null, $policy = null, $contentMd5 = null)
     {
diff --git a/src/Upyun/Uploader.php b/src/Upyun/Uploader.php
index 95e6f2f..fb0b40b 100644
--- a/src/Upyun/Uploader.php
+++ b/src/Upyun/Uploader.php
@@ -24,7 +24,7 @@ public function __construct(Config $config)
 
     public function upload($path, $file, $params, $withAsyncProcess)
     {
-        $stream = Psr7\stream_for($file);
+        $stream = Psr7\Utils::streamFor($file);
         $size = $stream->getSize();
         $useBlock = $this->needUseBlock($size);
 
@@ -87,7 +87,7 @@ private function pointUpload($path, $stream, $params)
                     'X-Upyun-Multi-Uuid' => $uuid,
                     'X-Upyun-Part-Id' => $partId
                 ))
-                ->withFile(Psr7\stream_for($fileBlock))
+                ->withFile(Psr7\Utils::streamFor($fileBlock))
                 ->send();
 
             if ($res->getStatusCode() !== 204) {
@@ -110,6 +110,91 @@ private function pointUpload($path, $stream, $params)
         return $res;
     }
 
+    /**
+     * 初始化一个分片上传事件
+     * @param       $path
+     * @param       $size
+     * @param array $params
+     * @return mixed
+     * @throws \Exception
+     */
+    public function initiateMultipartUpload($path, $size, $params=[])
+    {
+        $req = new Rest($this->config);
+        $headers = array();
+        if (is_array($params)) {
+            foreach ($params as $key => $val) {
+                $headers['X-Upyun-Meta-' . $key] = $val;
+            }
+        }
+
+        $res = $req->request('PUT', $path)
+            ->withHeaders(array_merge(array(
+                'X-Upyun-Multi-Stage' => 'initiate',
+                'X-Upyun-Multi-Type' => Psr7\mimetype_from_filename($path),
+                'X-Upyun-Multi-Length' => $size,
+            ), $headers))
+            ->send();
+        if ($res->getStatusCode() !== 204) {
+            throw new \Exception('init request failed when poinit upload!');
+        }
+        $init      = Util::getHeaderParams($res->getHeaders());
+        $uuid      = $init['x-upyun-multi-uuid'];
+        return $uuid;
+    }
+
+    /**
+     * 上传分片
+     * @param $path
+     * @param $fileBlock
+     * @param $i
+     * @param $uuid
+     * @return mixed
+     * @throws \Exception
+     */
+    public function uploadPart($path, $fileBlock, $i, $uuid)
+    {
+        $req = new Rest($this->config);
+
+        $res = $req->request('PUT', $path)
+            ->withHeaders(array(
+                'X-Upyun-Multi-Stage' => 'upload',
+                'X-Upyun-Multi-Uuid' => $uuid,
+                'X-Upyun-Part-Id' => $i
+            ))
+            ->withFile(Psr7\Utils::streamFor($fileBlock))
+            ->send();
+        if ($res->getStatusCode() !== 204) {
+            throw new \Exception('upload request failed when point upload!');
+        }
+        $data   = Util::getHeaderParams($res->getHeaders());
+        $partId = $data['x-upyun-next-part-id'];
+        return $partId;
+    }
+
+    /**
+     * 完成分片上传
+     * @param $path
+     * @param $uuid
+     * @return array
+     * @throws \Exception
+     */
+    public function completeMultipartUpload($path, $uuid)
+    {
+        $req = new Rest($this->config);
+
+        $res = $req->request('PUT', $path)
+            ->withHeaders(array(
+                'X-Upyun-Multi-Uuid' => $uuid,
+                'X-Upyun-Multi-Stage' => 'complete'
+            ))
+            ->send();
+        if ($res->getStatusCode() != 204 && $res->getStatusCode() != 201) {
+            throw new \Exception('end request failed when poinit upload!');
+        }
+        return Util::getHeaderParams($res->getHeaders());
+    }
+
     private function needUseBlock($fileSize)
     {
         if ($this->config->uploadType === 'BLOCK' ||
@@ -146,7 +231,7 @@ private function concurrentPointUpload($path, $stream, $params)
             ->withHeaders(array_merge(array(
                 'X-Upyun-Multi-Disorder' => 'true',
                 'X-Upyun-Multi-Stage' => 'initiate',
-                'X-Upyun-Multi-Type' => Psr7\mimetype_from_filename($path),
+                'X-Upyun-Multi-Type' => Psr7\MimeType::fromFilename($path),
                 'X-Upyun-Multi-Length' => $stream->getSize(),
             ), $headers))
             ->send();
@@ -167,7 +252,7 @@ private function concurrentPointUpload($path, $stream, $params)
                         'X-Upyun-Multi-Uuid' => $uuid,
                         'X-Upyun-Part-Id' => $i
                     ))
-                    ->withFile(Psr7\stream_for($fileBlock))
+                    ->withFile(Psr7\Utils::streamFor($fileBlock))
                     ->toRequest();
             }
         };
diff --git a/src/Upyun/Upyun.php b/src/Upyun/Upyun.php
index e74c6c7..fb8b396 100644
--- a/src/Upyun/Upyun.php
+++ b/src/Upyun/Upyun.php
@@ -127,6 +127,48 @@ public function write($path, $content, $params = array(), $withAsyncProcess = fa
         return Util::getHeaderParams($response->getHeaders());
     }
 
+    /**
+     * 初始化一个分片上传事件
+     * @param       $path
+     * @param       $size
+     * @param array $params
+     * @return mixed
+     * @throws \Exception
+     */
+    public function initiateMultipartUpload($path, $size, $params=[])
+    {
+        $upload = new Uploader($this->config);
+        return $upload->initiateMultipartUpload($path, $size, $params);
+    }
+
+    /**
+     * 上传分片
+     * @param $path
+     * @param $fileBlock
+     * @param $i
+     * @param $uuid
+     * @return mixed
+     * @throws \Exception
+     */
+    public function uploadPart($path, $fileBlock, $i, $uuid)
+    {
+        $upload = new Uploader($this->config);
+        return $upload->uploadPart($path, $fileBlock, $i, $uuid);
+    }
+
+    /**
+     * 完成分片上传
+     * @param $path
+     * @param $uuid
+     * @return array
+     * @throws \Exception
+     */
+    public function completeMultipartUpload($path, $uuid)
+    {
+        $upload = new Uploader($this->config);
+        return $upload->completeMultipartUpload($path, $uuid);
+    }
+
     /**
      * 读取云存储文件/目录内容
      *
@@ -154,7 +196,7 @@ public function read($path, $saveHandler = null, $params = array())
 
         if (! isset($params['x-upyun-list-iter'])) {
             if (is_resource($saveHandler)) {
-                Psr7\copy_to_stream($response->getBody(), Psr7\stream_for($saveHandler));
+                Psr7\Utils::copyToStream($response->getBody(), Psr7\stream_for($saveHandler));
                 return true;
             } else {
                 return $response->getBody()->getContents();
@@ -351,7 +393,7 @@ public function purge($urls)
             'headers' =>  Signature::getPurgeSignHeader($this->config, $urlString),
             'form_params' => ['purge' => $urlString]
         ]);
-        $result = json_decode($response->getBody()->getContents(), true);
+        $result = json_decode((string)$response->getBody(), true);
         return $result['invalid_domain_of_url'];
     }