diff --git a/Aliyun/Log/Client.php b/Aliyun/Log/Client.php
index 2a832b6..0d5a162 100644
--- a/Aliyun/Log/Client.php
+++ b/Aliyun/Log/Client.php
@@ -24,19 +24,9 @@
 class Aliyun_Log_Client {
 
     /**
-     * @var string aliyun accessKey
+     *@var Aliyun_Log_Models_CredentialsProvider credentialsProvider
      */
-    protected $accessKey;
-    
-    /**
-     * @var string aliyun accessKeyId
-     */
-    protected $accessKeyId;
-
-    /**
-     *@var string aliyun sts token
-     */
-    protected $stsToken;
+    protected $credentialsProvider;
 
     /**
      * @var string LOG endpoint
@@ -64,7 +54,9 @@ class Aliyun_Log_Client {
     protected $source;
     
     /**
-     * Aliyun_Log_Client constructor
+     * Aliyun_Log_Client constructor.
+     *
+     * Either $accessKeyId/$accessKeySecret or $credentialsProvider must be provided.
      *
      * @param string $endpoint
      *            LOG host name, for example, http://cn-hangzhou.sls.aliyuncs.com
@@ -72,12 +64,30 @@ class Aliyun_Log_Client {
      *            aliyun accessKeyId
      * @param string $accessKey
      *            aliyun accessKey
+     * @param string $token
+     *            aliyun token
+     * @param Aliyun_Log_Models_CredentialsProvider $credentialsProvider
      */
-    public function __construct($endpoint, $accessKeyId, $accessKey,$token = "") {
-        $this->setEndpoint ( $endpoint ); // set $this->logHost
-        $this->accessKeyId = $accessKeyId;
-        $this->accessKey = $accessKey;
-        $this->stsToken = $token;
+    public function __construct(
+        string $endpoint,
+        string $accessKeyId = "",
+        string $accessKey = "",
+        string $token = "",
+        Aliyun_Log_Models_CredentialsProvider $credentialsProvider = null
+    ) {
+        $this->setEndpoint($endpoint); // set $this->logHost
+        if (!is_null($credentialsProvider)) {
+            $this->credentialsProvider = $credentialsProvider;
+        } else {
+            if (empty($accessKeyId) || empty($accessKey)) {
+                throw new Aliyun_Log_Exception("InvalidAccessKey", "accessKeyId or accessKeySecret is empty", "");
+            }
+            $this->credentialsProvider = new Aliyun_Log_Models_StaticCredentialsProvider(
+                $accessKeyId,
+                $accessKey,
+                $token
+            );
+        }
         $this->source = Aliyun_Log_Util::getLocalIp();
     }
     private function setEndpoint($endpoint) {
@@ -186,6 +196,17 @@ private function sendRequest($method, $url, $body, $headers) {
      * @throws Aliyun_Log_Exception
      */
     private function send($method, $project, $body, $resource, $params, $headers) {
+        $credentials = null;
+        try {
+            $credentials = $this->credentialsProvider->getCredentials();
+        } catch (Exception $ex) {
+            throw new Aliyun_Log_Exception(
+                'InvalidCredentials',
+                'Fail to get credentials:' . $ex->getMessage(),
+                ''
+            );
+        }
+
         if ($body) {
             $headers ['Content-Length'] = strlen ( $body );
             if(isset($headers ["x-log-bodyrawsize"])==false)
@@ -199,13 +220,13 @@ private function send($method, $project, $body, $resource, $params, $headers) {
         
         $headers ['x-log-apiversion'] = API_VERSION;
         $headers ['x-log-signaturemethod'] = 'hmac-sha1';
-        if(strlen($this->stsToken) >0)
-            $headers ['x-acs-security-token'] = $this -> stsToken;
+        if(strlen($credentials->getSecurityToken()) >0)
+            $headers ['x-acs-security-token'] = $credentials->getSecurityToken();
         if(is_null($project))$headers ['Host'] = $this->logHost;
         else $headers ['Host'] = "$project.$this->logHost";
         $headers ['Date'] = $this->GetGMT ();
-        $signature = Aliyun_Log_Util::getRequestAuthorization ( $method, $resource, $this->accessKey,$this->stsToken, $params, $headers );
-        $headers ['Authorization'] = "LOG $this->accessKeyId:$signature";
+        $signature = Aliyun_Log_Util::getRequestAuthorization ( $method, $resource, $credentials->getAccessKeySecret(), $credentials->getSecurityToken(), $params, $headers );
+        $headers ['Authorization'] = "LOG ".$credentials->getAccessKeyId().":$signature";
         
         $url = $resource;
         if ($params)
@@ -738,7 +759,7 @@ public function executeProjectSqlJson(Aliyun_Log_Models_ProjectSqlRequest $reque
      * Get logs from Log service.
      * Unsuccessful opertaion will cause an Aliyun_Log_Exception.
      *
-     * @param Aliyun_Log_Models_GetProjectLogsRequest $request the GetLogs request parameters class.
+     * @param Aliyun_Log_Models_ProjectSqlRequest $request the GetLogs request parameters class.
      * @throws Aliyun_Log_Exception
      * @return Aliyun_Log_Models_GetLogsResponse
      */
diff --git a/Aliyun/Log/Models/CredentialsProvider.php b/Aliyun/Log/Models/CredentialsProvider.php
new file mode 100644
index 0000000..beda65f
--- /dev/null
+++ b/Aliyun/Log/Models/CredentialsProvider.php
@@ -0,0 +1,83 @@
+<?php
+
+/**
+ * Copyright (C) Alibaba Cloud Computing
+ * All rights reserved
+ */
+
+
+class Aliyun_Log_Models_Credentials
+{
+    /**
+     * @var string
+     */
+    private $accessKeyId;
+    /**
+     * @var string
+     */
+    private $accessKeySecret;
+    /**
+     * @var string
+     */
+    private $securityToken;
+
+    public function __construct(string $accessKeyId, string $accessKeySecret, string $securityToken = '')
+    {
+        $this->accessKeyId = $accessKeyId;
+        $this->accessKeySecret = $accessKeySecret;
+        $this->securityToken = $securityToken;
+    }
+
+    /**
+     * @return string accessKeyId
+     */
+    public function getAccessKeyId()
+    {
+        return $this->accessKeyId;
+    }
+    /**
+     * @param string $accessKeyId
+     */
+    public function setAccessKeyId(string $accessKeyId)
+    {
+        $this->accessKeyId = $accessKeyId;
+    }
+    /**
+     * @return string accessKeySecret
+     */
+    public function getAccessKeySecret()
+    {
+        return $this->accessKeySecret;
+    }
+    /**
+     * @param string $accessKeySecret
+     */
+    public function setAccessKeySecret(string $accessKeySecret)
+    {
+        $this->accessKeySecret = $accessKeySecret;
+    }
+    /**
+     * @return string securityToken
+     */
+    public function getSecurityToken()
+    {
+        return $this->securityToken;
+    }
+    /**
+     * @param string $securityToken
+     */
+    public function setSecurityToken(string $securityToken)
+    {
+        $this->securityToken = $securityToken;
+    }
+}
+
+interface Aliyun_Log_Models_CredentialsProvider
+{
+    /**
+     * @return Aliyun_Log_Models_Credentials
+     * @throws Exception
+     */
+    public function getCredentials(): Aliyun_Log_Models_Credentials;
+}
+
diff --git a/Aliyun/Log/Models/StaticCredentialsProvider.php b/Aliyun/Log/Models/StaticCredentialsProvider.php
new file mode 100644
index 0000000..f176e5d
--- /dev/null
+++ b/Aliyun/Log/Models/StaticCredentialsProvider.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * Copyright (C) Alibaba Cloud Computing
+ * All rights reserved
+ */
+
+require_once realpath(dirname(__FILE__) . '/CredentialsProvider.php');
+
+
+class Aliyun_Log_Models_StaticCredentialsProvider implements Aliyun_Log_Models_CredentialsProvider
+{
+    /**
+     * @var Aliyun_Log_Models_Credentials
+     */
+    private $credentials;
+
+    /**
+     * @param string $accessKeyId
+     * @param string $accessKeySecret
+     * @param string $securityToken
+     */
+    public function __construct(string $accessKeyId, string $accessKeySecret, string $securityToken = '')
+    {
+        $this->credentials = new Aliyun_Log_Models_Credentials($accessKeyId, $accessKeySecret, $securityToken);
+    }
+    /**
+     * @return Aliyun_Log_Models_Credentials
+     */
+    public function getCredentials(): Aliyun_Log_Models_Credentials
+    {
+        return $this->credentials;
+    }
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index 61f1ac5..9051a4d 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,11 @@
 
 ## API VERSION
 
-0.6.2
+0.6.4
 
 ## SDK RELEASE TIME
 
-2018-02-18
+2024-05-28
 
 ## Introduction
 
diff --git a/composer.json b/composer.json
index bc5f72e..4ecca9a 100644
--- a/composer.json
+++ b/composer.json
@@ -32,5 +32,5 @@
     ]
   },
   "name": "alibabacloud/aliyun-log-php-sdk",
-  "version": "0.6.3"
+  "version": "0.6.4"
 }
diff --git a/sample/credentialsProviderSample.php b/sample/credentialsProviderSample.php
new file mode 100644
index 0000000..2583daa
--- /dev/null
+++ b/sample/credentialsProviderSample.php
@@ -0,0 +1,49 @@
+<?php
+echo "Hello, World!";
+require_once realpath(dirname(__FILE__) . '/./Log_Autoload.php');
+
+$endpoint = 'cn-hangzhou.log.aliyuncs.com';
+$accessKeyId = '';
+$accessKey = '';
+$token = "";
+$project = 'test';
+$logstore = 'test';
+
+
+$credentialsProvider = new Aliyun_Log_Models_StaticCredentialsProvider($accessKeyId, $accessKey, $token);
+$client = new Aliyun_Log_Client($endpoint, "", "", "", $credentialsProvider);
+
+$req = new Aliyun_Log_Models_GetLogsRequest($project, $logstore, 1698740109, 1698744321, '', '*', null, null, null, null);
+
+function putLogs(Aliyun_Log_Client $client, $project, $logstore)
+{
+    $topic = 'TestTopic';
+
+    $contents = array( // key-value pair
+        'TestKey' => 'TestContent',
+        'kv_json' => '{"a": "b", "c": 19021}'
+    );
+    $logItem = new Aliyun_Log_Models_LogItem();
+    $logItem->setTime(time());
+    $logItem->setContents($contents);
+    $logitems = array($logItem);
+    $request = new Aliyun_Log_Models_PutLogsRequest(
+        $project,
+        $logstore,
+        $topic,
+        null,
+        $logitems
+    );
+
+    try {
+        $response = $client->putLogs($request);
+    } catch (Aliyun_Log_Exception $ex) {
+        var_dump($ex);
+    } catch (Exception $ex) {
+        var_dump($ex);
+    }
+}
+
+putLogs($client, $project, $logstore);
+$res = $client->getLogs($req);
+var_dump($res->getLogs());