diff --git a/src/Client.php b/src/Client.php
index b458018..06b1c76 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -15,6 +15,7 @@ declare(strict_types=1);
 
 namespace D3\LinkmobilityClient;
 
+use Assert\InvalidArgumentException;
 use D3\LinkmobilityClient\Request\RequestInterface;
 use D3\LinkmobilityClient\Url\Url;
 use D3\LinkmobilityClient\Url\UrlInterface;
@@ -25,7 +26,6 @@ use GuzzleHttp\HandlerStack;
 use GuzzleHttp\MessageFormatter;
 use GuzzleHttp\Middleware;
 use GuzzleRetry\GuzzleRetryMiddleware;
-use InvalidArgumentException;
 use Psr\Http\Message\ResponseInterface;
 
 class Client
diff --git a/src/Request/Request.php b/src/Request/Request.php
index 0b7fd94..c472d70 100644
--- a/src/Request/Request.php
+++ b/src/Request/Request.php
@@ -16,6 +16,7 @@ declare(strict_types=1);
 namespace D3\LinkmobilityClient\Request;
 
 use Assert\Assert;
+use Assert\InvalidArgumentException;
 use D3\LinkmobilityClient\Client;
 use D3\LinkmobilityClient\Exceptions\ExceptionMessages;
 use D3\LinkmobilityClient\RecipientsList\RecipientsList;
@@ -26,7 +27,6 @@ use D3\LinkmobilityClient\ValueObject\Sender;
 use D3\LinkmobilityClient\ValueObject\SmsMessageAbstract;
 use D3\LinkmobilityClient\ValueObject\SmsMessageInterface;
 use GuzzleHttp\RequestOptions;
-use InvalidArgumentException;
 
 abstract class Request implements RequestInterface
 {
diff --git a/src/Request/RequestInterface.php b/src/Request/RequestInterface.php
index 90185f2..caefb10 100644
--- a/src/Request/RequestInterface.php
+++ b/src/Request/RequestInterface.php
@@ -15,10 +15,10 @@ declare(strict_types=1);
 
 namespace D3\LinkmobilityClient\Request;
 
+use Assert\InvalidArgumentException;
 use D3\LinkmobilityClient\Client;
 use D3\LinkmobilityClient\RecipientsList\RecipientsListInterface;
 use D3\LinkmobilityClient\ValueObject\SmsMessageInterface;
-use InvalidArgumentException;
 use Psr\Http\Message\ResponseInterface as PsrResponseInterface;
 use D3\LinkmobilityClient\Response\ResponseInterface as LMResponseInterface;
 
diff --git a/src/SMS/BinaryRequest.php b/src/SMS/BinaryRequest.php
index 6895224..8eefc2e 100644
--- a/src/SMS/BinaryRequest.php
+++ b/src/SMS/BinaryRequest.php
@@ -16,10 +16,10 @@ declare(strict_types=1);
 namespace D3\LinkmobilityClient\SMS;
 
 use Assert\Assert;
+use Assert\InvalidArgumentException;
 use D3\LinkmobilityClient\Request\Request;
 use D3\LinkmobilityClient\Url\Url;
 use D3\LinkmobilityClient\ValueObject\SmsBinaryMessage;
-use InvalidArgumentException;
 
 class BinaryRequest extends Request implements SmsRequestInterface
 {
diff --git a/src/SMS/TextRequest.php b/src/SMS/TextRequest.php
index b4ae0bf..2f2d041 100644
--- a/src/SMS/TextRequest.php
+++ b/src/SMS/TextRequest.php
@@ -16,10 +16,10 @@ declare(strict_types=1);
 namespace D3\LinkmobilityClient\SMS;
 
 use Assert\Assert;
+use Assert\InvalidArgumentException;
 use D3\LinkmobilityClient\Request\Request;
 use D3\LinkmobilityClient\Url\Url;
 use D3\LinkmobilityClient\ValueObject\SmsTextMessage;
-use InvalidArgumentException;
 
 class TextRequest extends Request implements SmsRequestInterface
 {
diff --git a/src/ValueObject/Recipient.php b/src/ValueObject/Recipient.php
index 2ec1115..865a48e 100644
--- a/src/ValueObject/Recipient.php
+++ b/src/ValueObject/Recipient.php
@@ -16,6 +16,7 @@ declare(strict_types=1);
 namespace D3\LinkmobilityClient\ValueObject;
 
 use Assert\Assert;
+use Assert\InvalidArgumentException;
 use D3\LinkmobilityClient\Exceptions\ExceptionMessages;
 use D3\LinkmobilityClient\Exceptions\RecipientException;
 use libphonenumber\NumberParseException;
@@ -44,6 +45,7 @@ class Recipient extends StringValueObject
      *
      * @throws NumberParseException
      * @throws RecipientException
+     * @throws InvalidArgumentException
      */
     public function __construct(string $number, string $iso2CountryCode)
     {
diff --git a/src/ValueObject/Sender.php b/src/ValueObject/Sender.php
index 7b36c72..790f5af 100644
--- a/src/ValueObject/Sender.php
+++ b/src/ValueObject/Sender.php
@@ -16,6 +16,7 @@ declare(strict_types=1);
 namespace D3\LinkmobilityClient\ValueObject;
 
 use Assert\Assert;
+use Assert\InvalidArgumentException;
 use D3\LinkmobilityClient\Exceptions\ExceptionMessages;
 use D3\LinkmobilityClient\Exceptions\NoSenderDefinedException;
 use D3\LinkmobilityClient\Exceptions\RecipientException;
@@ -32,6 +33,7 @@ class Sender extends ValueObject
      *
      * @throws NumberParseException
      * @throws RecipientException
+     * @throws InvalidArgumentException
      */
     public function __construct(string $number = null, string $iso2CountryCode = null)
     {
diff --git a/src/ValueObject/SmsTextMessage.php b/src/ValueObject/SmsTextMessage.php
index d5d99e1..e7d8ef4 100644
--- a/src/ValueObject/SmsTextMessage.php
+++ b/src/ValueObject/SmsTextMessage.php
@@ -15,7 +15,7 @@ declare(strict_types=1);
 
 namespace D3\LinkmobilityClient\ValueObject;
 
-use InvalidArgumentException;
+use Assert\InvalidArgumentException;
 
 class SmsTextMessage extends SmsMessageAbstract
 {
diff --git a/src/ValueObject/ValueObject.php b/src/ValueObject/ValueObject.php
index e537d1f..0f3b5d6 100644
--- a/src/ValueObject/ValueObject.php
+++ b/src/ValueObject/ValueObject.php
@@ -16,11 +16,16 @@ declare(strict_types=1);
 namespace D3\LinkmobilityClient\ValueObject;
 
 use Assert\Assert;
+use Assert\InvalidArgumentException;
 
 abstract class ValueObject
 {
     protected $value;
 
+    /**
+     * @param string $number
+     * @throws InvalidArgumentException
+     */
     public function __construct(string $number)
     {
         Assert::that($number)->notEmpty();