diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index ec10a83e..aa01ed09 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Composer normalize
         uses: docker://ergebnis/composer-normalize-action
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cb5033ab..720d5087 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
           extensions: mbstring
 
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         run: composer update --no-interaction --prefer-stable --prefer-lowest --no-progress
@@ -37,7 +37,7 @@ jobs:
     strategy:
       max-parallel: 10
       matrix:
-        php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+        php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
 
     steps:
       - name: Set up PHP
@@ -49,7 +49,7 @@ jobs:
           extensions: mbstring
 
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         run: composer update --no-interaction --no-progress
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index f1db7bc7..84e6c460 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index 7acf9b59..800bad1a 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -8,6 +8,9 @@
         '@Symfony' => true,
         'declare_strict_types' => false,
         'global_namespace_import' => false,
+        'no_superfluous_phpdoc_tags' => [
+            'allow_mixed' => true,
+        ],
         'phpdoc_annotation_without_dot' => false,
         'phpdoc_summary' => false,
         'phpdoc_to_comment' => false,
diff --git a/composer.json b/composer.json
index 999e6bc6..4f3b1a81 100644
--- a/composer.json
+++ b/composer.json
@@ -26,13 +26,13 @@
     ],
     "require": {
         "php": "^7.2.5 || ^8.0",
-        "guzzlehttp/guzzle": "^7.7",
-        "guzzlehttp/command": "^1.3",
-        "guzzlehttp/psr7": "^1.9.1 || ^2.4.5",
+        "guzzlehttp/guzzle": "^7.8",
+        "guzzlehttp/command": "^1.3.1",
+        "guzzlehttp/psr7": "^1.9.1 || ^2.5.1",
         "guzzlehttp/uri-template": "^1.0.1"
     },
     "require-dev": {
-        "bamarni/composer-bin-plugin": "^1.8.1",
+        "bamarni/composer-bin-plugin": "^1.8.2",
         "phpunit/phpunit": "^8.5.19 || ^9.5.8"
     },
     "autoload": {
diff --git a/src/GuzzleClient.php b/src/GuzzleClient.php
index 22d9b5ae..168c88fa 100644
--- a/src/GuzzleClient.php
+++ b/src/GuzzleClient.php
@@ -34,12 +34,9 @@ class GuzzleClient extends ServiceClient
      * - response_locations: Associative array of location types mapping to
      *   ResponseLocationInterface objects.
      *
-     * @param ClientInterface      $client                      HTTP client to use.
-     * @param DescriptionInterface $description                 Guzzle service description
-     * @param callable             $commandToRequestTransformer
-     * @param callable             $responseToResultTransformer
-     * @param HandlerStack         $commandHandlerStack
-     * @param array                $config                      Configuration options
+     * @param ClientInterface      $client      HTTP client to use.
+     * @param DescriptionInterface $description Guzzle service description
+     * @param array                $config      Configuration options
      */
     public function __construct(
         ClientInterface $client,
diff --git a/src/Parameter.php b/src/Parameter.php
index 29bab183..4b2f5d22 100644
--- a/src/Parameter.php
+++ b/src/Parameter.php
@@ -78,7 +78,7 @@ class Parameter implements ToArrayInterface
     /** @var string */
     private $format;
 
-    private $propertiesCache = null;
+    private $propertiesCache;
 
     /** @var Description */
     private $serviceDescription;
diff --git a/src/ResponseLocation/XmlLocation.php b/src/ResponseLocation/XmlLocation.php
index cea1db81..7fafb5fb 100644
--- a/src/ResponseLocation/XmlLocation.php
+++ b/src/ResponseLocation/XmlLocation.php
@@ -48,8 +48,8 @@ public function after(
     ) {
         // Handle additional, undefined properties
         $additional = $model->getAdditionalProperties();
-        if ($additional instanceof Parameter &&
-            $additional->getLocation() == $this->locationName
+        if ($additional instanceof Parameter
+            && $additional->getLocation() == $this->locationName
         ) {
             $result = new Result(array_merge(
                 $result->toArray(),
diff --git a/src/Serializer.php b/src/Serializer.php
index 145c48fb..d9090118 100644
--- a/src/Serializer.php
+++ b/src/Serializer.php
@@ -132,8 +132,6 @@ protected function createRequest(CommandInterface $command)
     /**
      * Create a request for an operation with a uri merged onto a base URI
      *
-     * @param \GuzzleHttp\Command\Guzzle\Operation $operation
-     *
      * @return \GuzzleHttp\Psr7\Request
      */
     private function createCommandWithUri(
diff --git a/tests/ResponseLocation/JsonLocationTest.php b/tests/ResponseLocation/JsonLocationTest.php
index cba64776..eb8fdb5c 100644
--- a/tests/ResponseLocation/JsonLocationTest.php
+++ b/tests/ResponseLocation/JsonLocationTest.php
@@ -39,9 +39,6 @@ public function testVisitsLocation()
 
     /**
      * @group ResponseLocation
-     *
-     * @param $name
-     * @param $expected
      */
     public function testVisitsWiredArray()
     {
diff --git a/vendor-bin/php-cs-fixer/composer.json b/vendor-bin/php-cs-fixer/composer.json
index c9dd5ee4..3e8c9dfb 100644
--- a/vendor-bin/php-cs-fixer/composer.json
+++ b/vendor-bin/php-cs-fixer/composer.json
@@ -1,7 +1,7 @@
 {
     "require": {
         "php": "^7.4 || ^8.0",
-        "friendsofphp/php-cs-fixer": "3.16.0"
+        "friendsofphp/php-cs-fixer": "3.40.2"
     },
     "config": {
         "preferred-install": "dist"