diff --git a/README.md b/README.md
index c013dda..39456c9 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,25 @@ Add your SmscRu login, secret key (hashed password) and default sender name (or
 ...
 ```
 
+> If smsc.ru is not responding, you MUST set custom host WITH trailing slash
+```
+// .env
+...
+SMSCRU_HOST=http://www1.smsc.kz/
+...
+```
+
+```php
+// config/services.php
+...
+'smscru' => [
+    ...
+    'host' => env('SMSCRU_HOST'),
+    ...
+],
+...
+```
+
 ## Usage
 
 You can use the channel in your `via()` method inside the notification:
diff --git a/src/SmscRuApi.php b/src/SmscRuApi.php
index 9d1197f..faba6b9 100644
--- a/src/SmscRuApi.php
+++ b/src/SmscRuApi.php
@@ -3,6 +3,7 @@
 namespace NotificationChannels\SmscRu;
 
 use DomainException;
+use Illuminate\Support\Arr;
 use GuzzleHttp\Client as HttpClient;
 use NotificationChannels\SmscRu\Exceptions\CouldNotSendNotification;
 
@@ -10,12 +11,12 @@ class SmscRuApi
 {
     const FORMAT_JSON = 3;
 
-    /** @var string */
-    protected $apiUrl = 'https://smsc.ru/sys/send.php';
-
     /** @var HttpClient */
     protected $httpClient;
 
+    /** @var string */
+    protected $url;
+
     /** @var string */
     protected $login;
 
@@ -25,11 +26,12 @@ class SmscRuApi
     /** @var string */
     protected $sender;
 
-    public function __construct($login, $secret, $sender)
+    public function __construct(array $config)
     {
-        $this->login = $login;
-        $this->secret = $secret;
-        $this->sender = $sender;
+        $this->url = Arr::get($config, 'host', 'https://smsc.ru/').'sys/send.php';
+        $this->login = Arr::get($config, 'login');
+        $this->secret = Arr::get($config, 'secret');
+        $this->sender = Arr::get($config, 'sender');
 
         $this->httpClient = new HttpClient([
             'timeout' => 5,
@@ -57,7 +59,7 @@ public function send($params)
         $params = array_merge($params, $base);
 
         try {
-            $response = $this->httpClient->post($this->apiUrl, ['form_params' => $params]);
+            $response = $this->httpClient->post($this->url, ['form_params' => $params]);
 
             $response = json_decode((string) $response->getBody(), true);
 
diff --git a/src/SmscRuServiceProvider.php b/src/SmscRuServiceProvider.php
index e441dd9..3c112c2 100644
--- a/src/SmscRuServiceProvider.php
+++ b/src/SmscRuServiceProvider.php
@@ -11,7 +11,7 @@ public function register()
         $this->app->singleton(SmscRuApi::class, function () {
             $config = config('services.smscru');
 
-            return new SmscRuApi($config['login'], $config['secret'], $config['sender']);
+            return new SmscRuApi($config);
         });
     }
 }
diff --git a/tests/SmscRuApiTest.php b/tests/SmscRuApiTest.php
new file mode 100644
index 0000000..bafe2b1
--- /dev/null
+++ b/tests/SmscRuApiTest.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace NotificationChannel\SmscRu\Tests;
+
+use NotificationChannels\SmscRu\SmscRuApi;
+
+class SmscRuApiTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var SmscRuApi
+     */
+    private $smsc;
+
+    public function tearDown()
+    {
+        $this->smsc = null;
+
+        parent::tearDown();
+    }
+
+    /** @test */
+    public function it_has_default_url()
+    {
+        $this->smsc = new SmscRuApi([]);
+        $this->assertAttributeEquals('https://smsc.ru/sys/send.php', 'url', $this->smsc);
+        $this->assertAttributeEquals(null, 'login', $this->smsc);
+        $this->assertAttributeEquals(null, 'secret', $this->smsc);
+        $this->assertAttributeEquals(null, 'sender', $this->smsc);
+    }
+
+    /** @test */
+    public function it_has_custom_config()
+    {
+        $host = 'https://smsc.kz/';
+        $login = 'login';
+        $secret = 'secret';
+        $sender = 'sender';
+
+        $this->smsc = new SmscRuApi([
+            'host'   => $host,
+            'login'  => $login,
+            'secret' => $secret,
+            'sender' => $sender,
+        ]);
+
+        $this->assertAttributeEquals('https://smsc.kz/sys/send.php', 'url', $this->smsc);
+        $this->assertAttributeEquals($login, 'login', $this->smsc);
+        $this->assertAttributeEquals($secret, 'secret', $this->smsc);
+        $this->assertAttributeEquals($sender, 'sender', $this->smsc);
+    }
+}
diff --git a/tests/SmscRuChannelTest.php b/tests/SmscRuChannelTest.php
index 2c2626f..4fe55bf 100644
--- a/tests/SmscRuChannelTest.php
+++ b/tests/SmscRuChannelTest.php
@@ -35,7 +35,11 @@ public function setUp()
     {
         parent::setUp();
 
-        $this->smsc = M::mock(SmscRuApi::class, ['test', 'test', 'John_Doe']);
+        $this->smsc = M::mock(SmscRuApi::class, [
+            'login' => 'test',
+            'secret' => 'test',
+            'sender' => 'John_Doe',
+        ]);
         $this->channel = new SmscRuChannel($this->smsc);
         $this->message = M::mock(SmscRuMessage::class);
     }