diff --git a/README.md b/README.md
index 04b8cb5..578cf09 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,14 @@ $soapClient->useProxy('proxy.local', 8080, CURLPROXY_SOCKS5);
 
 The default hostname, port and type for this methods are `localhost`, `8888` and `CURLPROXY_HTTP`, which is the default binding for Fiddler Web Debugging Proxy ([http://fiddler2.com/](http://fiddler2.com/)).
 
+### Proxy Auth ###
+
+If your proxy need auth, you can use this method to set proxy username and password:
+```php
+<?php
+$soapClient->setProxyAuth('proxy_user', 'proxy_password');
+```
+
 ### Authentication ###
 
 In order to use HTTP Authentication, use SoapClient original `login` and `password` options. The cURL client will get it from there.
diff --git a/src/Camcima/Soap/Client.php b/src/Camcima/Soap/Client.php
index 5d2e1c4..be926ec 100644
--- a/src/Camcima/Soap/Client.php
+++ b/src/Camcima/Soap/Client.php
@@ -72,6 +72,20 @@ class Client extends \SoapClient
      */
     protected $proxyPort;
 
+    /**
+     * Proxy User
+     *
+     * @var string
+     */
+    protected $proxyUser;
+
+    /**
+     * Proxy Password
+     *
+     * @var string
+     */
+    protected $proxyPass;
+
     /**
      * Lowercase first character of the root element name
      * 
@@ -360,6 +374,21 @@ public function useProxy($host = self::DEFAULT_PROXY_HOST, $port = self::DEFAULT
         return $this;
     }
 
+    /**
+     * Set proxy auth data
+     *
+     * @param $user
+     * @param $passwd
+     * @return $this
+     */
+    public function setProxyAuth($user, $passwd)
+    {
+        $this->proxyUser = $user;
+        $this->proxyPass = $passwd;
+
+        return $this;
+    }
+
     /**
      * Merge Curl Options
      * 
@@ -389,6 +418,7 @@ public function getCurlOptions()
             $mergedArray[CURLOPT_PROXYTYPE] = $this->proxyType;
             $mergedArray[CURLOPT_PROXY] = $this->proxyHost;
             $mergedArray[CURLOPT_PROXYPORT] = $proxyPort;
+            $mergedArray[CURLOPT_PROXYUSERPWD] = $this->proxyUser . ':' . $this->proxyPass;
         }
 
         return $mergedArray;