diff --git a/README.md b/README.md
index 3a0bb7f..efa6f14 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,8 @@
-# 阿里巴巴nacos配置中心-PHP客户端
+# 阿里巴巴nacos配置中心-PHP客户端.
+
+### 更新
+
+1. 查询实例列表支持自定义groupName参数
 
 [Nacos配置中心](https://github.com/alibaba/nacos)的PHP客户端，更多关于Nacos配置中心的介绍，可以查看[Nacos配置中心Wiki](https://github.com/alibaba/nacos/wiki)。
 
diff --git a/composer.json b/composer.json
index 43f72b9..42094c3 100644
--- a/composer.json
+++ b/composer.json
@@ -1,12 +1,12 @@
 {
-  "name": "alibaba/nacos",
+  "name": "bufanyun/nacos",
   "description": "阿里巴巴nacos配置中心php客户端",
   "type": "library",
   "license": "MIT",
   "authors": [
     {
-      "name": "suxiaolin",
-      "email": "dear.lin@live.com"
+      "name": "mengshuai",
+      "email": "133814250@qq.com"
     }
   ],
   "require": {
diff --git a/src/alibaba/nacos/NamingClient.php b/src/alibaba/nacos/NamingClient.php
index c5af6ac..5ab3dd0 100644
--- a/src/alibaba/nacos/NamingClient.php
+++ b/src/alibaba/nacos/NamingClient.php
@@ -122,19 +122,17 @@ public static function update($serviceName, $ip, $port, $weight = "", $namespace
      * @param bool $healthyOnly
      * @param string $namespaceId
      * @param string $clusters
+     * @param string $groupName
      * @return model\InstanceList
-     * @throws ReflectionException
-     * @throws RequestUriRequiredException
-     * @throws RequestVerbRequiredException
-     * @throws ResponseCodeErrorException
      */
-    public static function listInstances($serviceName, $healthyOnly = false, $namespaceId = "", $clusters = "")
+    public static function listInstances($serviceName, $healthyOnly = false, $namespaceId = "", $clusters = "", $groupName = "")
     {
         try {
             $listInstanceDiscovery = new ListInstanceNaming();
             $listInstanceDiscovery->setServiceName($serviceName);
             $listInstanceDiscovery->setNamespaceId($namespaceId);
             $listInstanceDiscovery->setClusters($clusters);
+            $listInstanceDiscovery->setGroupName($groupName);
             $listInstanceDiscovery->setHealthyOnly($healthyOnly);
 
             $response = $listInstanceDiscovery->doRequest();
diff --git a/src/alibaba/nacos/request/naming/ListInstanceNaming.php b/src/alibaba/nacos/request/naming/ListInstanceNaming.php
index 5473129..8fde928 100644
--- a/src/alibaba/nacos/request/naming/ListInstanceNaming.php
+++ b/src/alibaba/nacos/request/naming/ListInstanceNaming.php
@@ -27,6 +27,12 @@ class ListInstanceNaming extends NamingRequest
      */
     private $clusters;
 
+    /**
+     * 分组名
+     * @var
+     */
+    private $groupName;
+
     /**
      * 是否只返回健康实例
      *
@@ -82,6 +88,22 @@ public function setClusters($clusters)
         $this->clusters = $clusters;
     }
 
+    /**
+     * @return mixed
+     */
+    public function getGroupName()
+    {
+        return $this->groupName;
+    }
+
+    /**
+     * @param mixed $groupName
+     */
+    public function setGroupName($groupName)
+    {
+        $this->groupName = $groupName;
+    }
+
     /**
      * @return mixed
      */
diff --git a/tests/request/naming/ListInstanceNamingTest.php b/tests/request/naming/ListInstanceNamingTest.php
index 21bcd51..b784b8f 100644
--- a/tests/request/naming/ListInstanceNamingTest.php
+++ b/tests/request/naming/ListInstanceNamingTest.php
@@ -25,6 +25,7 @@ public function testDoRequest()
         $listInstanceDiscovery->setServiceName("nacos.test.1");
         $listInstanceDiscovery->setNamespaceId("");
         $listInstanceDiscovery->setClusters("");
+        $listInstanceDiscovery->setGroupName("");
         $listInstanceDiscovery->setHealthyOnly(false);
 
         $response = $listInstanceDiscovery->doRequest();