diff --git a/.gitignore b/.gitignore
index d04695f..ae60653 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ vendor
 .idea
 *.iml
 clover.xml
+.phpunit.result.cache
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 70ab64a..90349db 100755
--- a/composer.json
+++ b/composer.json
@@ -7,15 +7,15 @@
         "Apple Jwt"
     ],
     "require": {
-        "php": ">=5.6",
-        "guzzlehttp/guzzle": "~6.5",
-        "firebase/php-jwt": "~5.2",
+        "php": ">=8.1",
+        "guzzlehttp/guzzle": "~7.15.2",
+        "firebase/php-jwt": "~7.1.0",
         "ext-json": "*",
         "ext-openssl": "*"
     },
     "require-dev": {
         "mockery/mockery": "1.3.1",
-        "phpunit/phpunit": "5.7.27"
+        "phpunit/phpunit": "8.5.50"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/Client.php b/src/Client.php
index 92765c4..ecf9139 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -7,6 +7,7 @@
 use Exception;
 use Firebase\JWT\JWK;
 use Firebase\JWT\JWT;
+use Firebase\JWT\Key;
 use GuzzleHttp\ClientInterface;
 use GuzzleHttp\Exception\RequestException;
 use GuzzleHttp\RequestOptions;
@@ -47,7 +48,7 @@ public function __construct(ClientInterface $httpClient, Config $config)
     public function verifyAndDecodeJwt($jwtToken)
     {
         return new JwtVerifyResponse(
-            JWT::decode($jwtToken, $this->getApplePublicKey(), ['RS256'])
+            JWT::decode($jwtToken, $this->getApplePublicKey())
         );
     }
 
diff --git a/test/ClientTest.php b/test/ClientTest.php
index a8197d1..3ab1fb9 100644
--- a/test/ClientTest.php
+++ b/test/ClientTest.php
@@ -13,13 +13,10 @@
 
 class ClientTest extends m\Adapter\Phpunit\MockeryTestCase
 {
-    /** @var string */
-    private $appleJwk;
+    private string|false $appleJwk;
+    private string|false $appleJwt;
 
-    /** @var string */
-    private $appleJwt;
-
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->appleJwk = file_get_contents(__DIR__ . '/data/appleJwk.json');
         $this->appleJwt = file_get_contents(__DIR__ . '/data/appleJwt');
diff --git a/test/Response/JwtVerifyResponseTest.php b/test/Response/JwtVerifyResponseTest.php
index 0fda81c..b890429 100644
--- a/test/Response/JwtVerifyResponseTest.php
+++ b/test/Response/JwtVerifyResponseTest.php
@@ -9,9 +9,9 @@
 class JwtVerifyResponseTest extends MockeryTestCase
 {
     /** @var stdClass */
-    private $appleJwt;
+    private mixed $appleJwt;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->appleJwt = json_decode(file_get_contents(__DIR__ . '/../data/appleJwtDecoded.json'));
         parent::setUp();