diff --git a/.php_cs.dist b/.php_cs.dist
index bdeb415..f17054e 100644
--- a/.php_cs.dist
+++ b/.php_cs.dist
@@ -27,7 +27,6 @@ return PhpCsFixer\Config::create()
         'fopen_flags'                           => false,
         'header_comment'                        => ['header' => $fileHeaderComment, 'separate' => 'both'],
         'linebreak_after_opening_tag'           => true,
-        'mb_str_functions'                      => true,
         'no_php4_constructor'                   => true,
         'no_unreachable_default_argument_value' => true,
         'no_useless_else'                       => true,
@@ -45,4 +44,4 @@ return PhpCsFixer\Config::create()
         'strict_param'                          => true,
     ])
     ->setFinder($finder)
-;
\ No newline at end of file
+;
diff --git a/src/Client/GuzzleClient.php b/src/Client/GuzzleClient.php
index 8f50005..97fdb16 100644
--- a/src/Client/GuzzleClient.php
+++ b/src/Client/GuzzleClient.php
@@ -18,6 +18,7 @@
 use GuzzleHttp\Client;
 use GuzzleHttp\Exception\GuzzleException;
 use GuzzleHttp\HandlerStack;
+use GuzzleHttp\RequestOptions;
 use Psr\Http\Message\ResponseInterface;
 use Symfony\Component\DomCrawler\Crawler;
 use Wa72\HtmlPageDom\HtmlPage;
@@ -70,6 +71,22 @@ public function getGuzzleResponse(
         }
     }
 
+    /**
+     * {@inheritdoc}
+     *
+     * @throws GuzzleClientException
+     */
+    public function writeGuzzleResponseToFile(
+        string $uri,
+        string $filename,
+        array $options = [],
+        string $method = self::METHOD_GET
+    ): ResponseInterface {
+        return $this->getGuzzleResponse($uri, $options + [
+            RequestOptions::SINK => $filename,
+        ], $method);
+    }
+
     /**
      * {@inheritdoc}
      *
diff --git a/src/Client/GuzzleClientInterface.php b/src/Client/GuzzleClientInterface.php
index 52236b3..909dd51 100644
--- a/src/Client/GuzzleClientInterface.php
+++ b/src/Client/GuzzleClientInterface.php
@@ -119,6 +119,21 @@ public function getGuzzleResponse(
         string $method = self::METHOD_GET
     ): ResponseInterface;
 
+    /**
+     * @param string $uri
+     * @param string $filename
+     * @param array  $options
+     * @param string $method
+     *
+     * @return ResponseInterface
+     */
+    public function writeGuzzleResponseToFile(
+        string $uri,
+        string $filename,
+        array $options = [],
+        string $method = self::METHOD_GET
+    ): ResponseInterface;
+
     /**
      * @param string $uri
      * @param array  $options
diff --git a/src/Formatter/GuzzleMessageFormatter.php b/src/Formatter/GuzzleMessageFormatter.php
index caaccce..7aa30e2 100644
--- a/src/Formatter/GuzzleMessageFormatter.php
+++ b/src/Formatter/GuzzleMessageFormatter.php
@@ -20,7 +20,7 @@ class GuzzleMessageFormatter extends MessageFormatter
     protected const CREDENTIAL_REPLACEMENT = '******';
 
     /** @var string[] */
-    protected $credentialsToReplace;
+    protected $credentialsToReplace = [];
 
     /**
      * @param string[] $credentialsToReplace