diff --git a/src/Api/WebSocketV5/SocketServer.php b/src/Api/WebSocketV5/SocketServer.php
index afffe3b..9e59b43 100644
--- a/src/Api/WebSocketV5/SocketServer.php
+++ b/src/Api/WebSocketV5/SocketServer.php
@@ -47,11 +47,11 @@ private function getBaseUrl($type='public'){
 
         switch ($type){
             case 'public':{
-                return 'ws://ws.okex.com:8443/ws/v5/public';
+                return 'ws://ws.okx.com:8443/ws/v5/public';
             }
             //private
             default :{
-                return 'ws://ws.okex.com:8443/ws/v5/private';
+                return 'ws://ws.okx.com:8443/ws/v5/private';
             }
         }
     }
diff --git a/src/OkexV5.php b/src/OkexV5.php
index be77064..fd73714 100644
--- a/src/OkexV5.php
+++ b/src/OkexV5.php
@@ -22,7 +22,7 @@ class OkexV5
 
     protected $options=[];
 
-    function __construct(string $key='',string $secret='',string $passphrase='',string $host='https://www.okex.com'){
+    function __construct(string $key='',string $secret='',string $passphrase='',string $host='https://www.okx.com'){
         $this->key=$key;
         $this->secret=$secret;
         $this->host=$host;
diff --git a/src/Request.php b/src/Request.php
index 4ac3a01..7399215 100644
--- a/src/Request.php
+++ b/src/Request.php
@@ -43,7 +43,7 @@ public function __construct(array $data)
         $this->key=$data['key'] ?? '';
         $this->secret=$data['secret'] ?? '';
         $this->passphrase = $data['passphrase'] ?? '';
-        $this->host=$data['host'] ?? 'https://www.okex.com/';
+        $this->host=$data['host'] ?? 'https://www.okx.com/';
 
         $this->options=$data['options'] ?? [];