diff --git a/src/Exceptions/CouldNotSendNotification.php b/src/Exceptions/CouldNotSendNotification.php
index 137559d3ce775f92ca6c73edddd9268f298b5232..6b6b0c1b8393301c5adb8eb426f2cf3af98d264f 100644
--- a/src/Exceptions/CouldNotSendNotification.php
+++ b/src/Exceptions/CouldNotSendNotification.php
@@ -23,7 +23,6 @@ class CouldNotSendNotification extends Exception
      * Thrown when we're unable to communicate with smsc.ru.
      *
      * @param  DomainException  $exception
-     *
      * @return static
      */
     public static function smscRespondedWithAnError(DomainException $exception): self
@@ -39,7 +38,6 @@ class CouldNotSendNotification extends Exception
      * Thrown when we're unable to communicate with smsc.ru.
      *
      * @param  Exception  $exception
-     *
      * @return static
      */
     public static function couldNotCommunicateWithSmsc(Exception $exception): self
diff --git a/src/SmscRuApi.php b/src/SmscRuApi.php
index ea55584c2eafff0a3f816d1ac7f79f32d0448454..193a4f8acfb61e1e98f2e95898700019e8c62fc5 100644
--- a/src/SmscRuApi.php
+++ b/src/SmscRuApi.php
@@ -47,10 +47,10 @@ class SmscRuApi
     {
         $base = [
             'charset' => 'utf-8',
-            'login'   => $this->login,
-            'psw'     => $this->secret,
-            'sender'  => $this->sender,
-            'fmt'     => self::FORMAT_JSON,
+            'login' => $this->login,
+            'psw' => $this->secret,
+            'sender' => $this->sender,
+            'fmt' => self::FORMAT_JSON,
         ];
 
         $params = \array_merge($base, \array_filter($params), $this->extra);
diff --git a/src/SmscRuChannel.php b/src/SmscRuChannel.php
index dcfd14fcad923426729417e58783731171f0c162..9cd0cde3cdf50a1aa83088fa008314f673ff2893 100644
--- a/src/SmscRuChannel.php
+++ b/src/SmscRuChannel.php
@@ -20,10 +20,9 @@ class SmscRuChannel
      *
      * @param  mixed  $notifiable
      * @param  Notification  $notification
+     * @return array|null
      *
      * @throws CouldNotSendNotification
-     *
-     * @return array|null
      */
     public function send($notifiable, Notification $notification): ?array
     {
@@ -45,7 +44,6 @@ class SmscRuChannel
      *
      * @param  mixed  $notifiable
      * @param  Notification  $notification
-     *
      * @return string[]
      */
     protected function getRecipients($notifiable, Notification $notification): array
@@ -66,9 +64,9 @@ class SmscRuChannel
         }
 
         $params = [
-            'phones'  => \implode(',', $recipients),
-            'mes'     => $message->content,
-            'sender'  => $message->from,
+            'phones' => \implode(',', $recipients),
+            'mes' => $message->content,
+            'sender' => $message->from,
         ];
 
         if ($message->sendAt instanceof \DateTimeInterface) {
diff --git a/src/SmscRuMessage.php b/src/SmscRuMessage.php
index a0c615379744f397f018f6c8298db9da88e97376..b84deeead54c47043b11f7b32a8257af32317fbc 100644
--- a/src/SmscRuMessage.php
+++ b/src/SmscRuMessage.php
@@ -28,8 +28,7 @@ class SmscRuMessage
     /**
      * Create a new message instance.
      *
-     * @param  string $content
-     *
+     * @param  string  $content
      * @return static
      */
     public static function create($content = '')
@@ -49,7 +48,6 @@ class SmscRuMessage
      * Set the message content.
      *
      * @param  string  $content
-     *
      * @return $this
      */
     public function content($content)
@@ -63,7 +61,6 @@ class SmscRuMessage
      * Set the phone number or sender name the message should be sent from.
      *
      * @param  string  $from
-     *
      * @return $this
      */
     public function from($from)
@@ -77,10 +74,9 @@ class SmscRuMessage
      * Set the time the message should be sent.
      *
      * @param  \DateTimeInterface|null  $sendAt
-     *
      * @return $this
      */
-    public function sendAt(\DateTimeInterface $sendAt = null)
+    public function sendAt(?\DateTimeInterface $sendAt = null)
     {
         $this->sendAt = $sendAt;
 
diff --git a/tests/SmscRuApiTest.php b/tests/SmscRuApiTest.php
index 013e5ab50c0775575327462708530e1fcb5e1fab..4e91d08ef6cec7999a4c530b271bf474bb7128ec 100644
--- a/tests/SmscRuApiTest.php
+++ b/tests/SmscRuApiTest.php
@@ -10,7 +10,7 @@ class SmscRuApiTest extends TestCase
     public function test_it_has_config_with_default_endpoint(): void
     {
         $smsc = $this->getExtendedSmscRuApi([
-            'login'  => $login = 'login',
+            'login' => $login = 'login',
             'secret' => $secret = 'secret',
             'sender' => $sender = 'sender',
         ]);
diff --git a/tests/SmscRuChannelTest.php b/tests/SmscRuChannelTest.php
index bba36f774440ac1a6be7a3b94e83444e54aea2c7..5a569651d8030b3d91abd63000f64b9c0c05bd54 100644
--- a/tests/SmscRuChannelTest.php
+++ b/tests/SmscRuChannelTest.php
@@ -45,9 +45,9 @@ class SmscRuChannelTest extends TestCase
         $this->smsc->shouldReceive('send')
             ->once()
             ->with([
-                'phones'  => '+1234567890',
-                'mes'     => 'hello',
-                'sender'  => 'John_Doe',
+                'phones' => '+1234567890',
+                'mes' => 'hello',
+                'sender' => 'John_Doe',
             ]);
 
         $this->channel->send(new TestNotifiable(), new TestNotification());
@@ -60,10 +60,10 @@ class SmscRuChannelTest extends TestCase
         $this->smsc->shouldReceive('send')
             ->once()
             ->with([
-                'phones'  => '+1234567890',
-                'mes'     => 'hello',
-                'sender'  => 'John_Doe',
-                'time'    => '0'.self::$sendAt->getTimestamp(),
+                'phones' => '+1234567890',
+                'mes' => 'hello',
+                'sender' => 'John_Doe',
+                'time' => '0'.self::$sendAt->getTimestamp(),
             ]);
 
         $this->channel->send(new TestNotifiable(), new TestNotificationWithSendAt());
@@ -83,9 +83,9 @@ class SmscRuChannelTest extends TestCase
         $this->smsc->shouldReceive('send')
             ->once()
             ->with([
-                'phones'  => '+1234567890,+0987654321,+1234554321',
-                'mes'     => 'hello',
-                'sender'  => 'John_Doe',
+                'phones' => '+1234567890,+0987654321,+1234554321',
+                'mes' => 'hello',
+                'sender' => 'John_Doe',
             ]);
 
         $this->channel->send(new TestNotifiableWithManyPhones(), new TestNotification());