diff --git a/.gitignore b/.gitignore
index 7af493e..c5bf2a4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,5 +3,6 @@
 /build
 /vendor
 .DS_Store
+.php-cs-fixer.cache
 .phpunit.result.cache
 composer.lock
diff --git a/src/Base64/Base64Parser.php b/src/Base64/Base64Parser.php
index edd8496..e0c81df 100644
--- a/src/Base64/Base64Parser.php
+++ b/src/Base64/Base64Parser.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Base64;
 
diff --git a/src/Base64/SafeBase64Parser.php b/src/Base64/SafeBase64Parser.php
index ae7486e..41ce085 100644
--- a/src/Base64/SafeBase64Parser.php
+++ b/src/Base64/SafeBase64Parser.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Base64;
 
diff --git a/src/Cryptography/Algorithms/Ecdsa/AbstractEcdsaSigner.php b/src/Cryptography/Algorithms/Ecdsa/AbstractEcdsaSigner.php
index 80fec7b..dda4cf2 100644
--- a/src/Cryptography/Algorithms/Ecdsa/AbstractEcdsaSigner.php
+++ b/src/Cryptography/Algorithms/Ecdsa/AbstractEcdsaSigner.php
@@ -1,10 +1,13 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Ecdsa;
 
 use MiladRahimi\Jwt\Cryptography\Keys\EcdsaPrivateKey;
 use MiladRahimi\Jwt\Cryptography\Signer;
 use MiladRahimi\Jwt\Exceptions\SigningException;
+
 use function ltrim;
 use function ord;
 use function str_pad;
diff --git a/src/Cryptography/Algorithms/Ecdsa/AbstractEcdsaVerifier.php b/src/Cryptography/Algorithms/Ecdsa/AbstractEcdsaVerifier.php
index 6f79cd8..89ee2f6 100644
--- a/src/Cryptography/Algorithms/Ecdsa/AbstractEcdsaVerifier.php
+++ b/src/Cryptography/Algorithms/Ecdsa/AbstractEcdsaVerifier.php
@@ -1,10 +1,13 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Ecdsa;
 
 use MiladRahimi\Jwt\Cryptography\Keys\EcdsaPublicKey;
 use MiladRahimi\Jwt\Cryptography\Verifier;
 use MiladRahimi\Jwt\Exceptions\InvalidSignatureException;
+
 use function chr;
 use function ltrim;
 use function ord;
diff --git a/src/Cryptography/Algorithms/Ecdsa/Algorithm.php b/src/Cryptography/Algorithms/Ecdsa/Algorithm.php
index a8cb4ee..23af69c 100644
--- a/src/Cryptography/Algorithms/Ecdsa/Algorithm.php
+++ b/src/Cryptography/Algorithms/Ecdsa/Algorithm.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Ecdsa;
 
diff --git a/src/Cryptography/Algorithms/Ecdsa/ES256KVerifier.php b/src/Cryptography/Algorithms/Ecdsa/ES256KVerifier.php
index d132172..cabc320 100644
--- a/src/Cryptography/Algorithms/Ecdsa/ES256KVerifier.php
+++ b/src/Cryptography/Algorithms/Ecdsa/ES256KVerifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Ecdsa;
 
diff --git a/src/Cryptography/Algorithms/Ecdsa/ES256Signer.php b/src/Cryptography/Algorithms/Ecdsa/ES256Signer.php
index fcef0b6..8ba5661 100644
--- a/src/Cryptography/Algorithms/Ecdsa/ES256Signer.php
+++ b/src/Cryptography/Algorithms/Ecdsa/ES256Signer.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Ecdsa;
 
diff --git a/src/Cryptography/Algorithms/Ecdsa/ES256Verifier.php b/src/Cryptography/Algorithms/Ecdsa/ES256Verifier.php
index 8d8975b..9954c21 100644
--- a/src/Cryptography/Algorithms/Ecdsa/ES256Verifier.php
+++ b/src/Cryptography/Algorithms/Ecdsa/ES256Verifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Ecdsa;
 
diff --git a/src/Cryptography/Algorithms/Ecdsa/ES384Signer.php b/src/Cryptography/Algorithms/Ecdsa/ES384Signer.php
index 12ff801..e39e0bc 100644
--- a/src/Cryptography/Algorithms/Ecdsa/ES384Signer.php
+++ b/src/Cryptography/Algorithms/Ecdsa/ES384Signer.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Ecdsa;
 
diff --git a/src/Cryptography/Algorithms/Ecdsa/ES384Verifier.php b/src/Cryptography/Algorithms/Ecdsa/ES384Verifier.php
index 32c4fc4..fa27605 100644
--- a/src/Cryptography/Algorithms/Ecdsa/ES384Verifier.php
+++ b/src/Cryptography/Algorithms/Ecdsa/ES384Verifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Ecdsa;
 
diff --git a/src/Cryptography/Algorithms/Eddsa/EdDsaSigner.php b/src/Cryptography/Algorithms/Eddsa/EdDsaSigner.php
index 56221bc..2373eb0 100644
--- a/src/Cryptography/Algorithms/Eddsa/EdDsaSigner.php
+++ b/src/Cryptography/Algorithms/Eddsa/EdDsaSigner.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Eddsa;
 
@@ -7,6 +9,7 @@
 use MiladRahimi\Jwt\Exceptions\SigningException;
 use RuntimeException;
 use SodiumException;
+
 use function function_exists;
 
 class EdDsaSigner implements Signer
diff --git a/src/Cryptography/Algorithms/Eddsa/EdDsaVerifier.php b/src/Cryptography/Algorithms/Eddsa/EdDsaVerifier.php
index 67b5503..85ada46 100644
--- a/src/Cryptography/Algorithms/Eddsa/EdDsaVerifier.php
+++ b/src/Cryptography/Algorithms/Eddsa/EdDsaVerifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Eddsa;
 
diff --git a/src/Cryptography/Algorithms/Hmac/AbstractHmac.php b/src/Cryptography/Algorithms/Hmac/AbstractHmac.php
index 7099246..4ab7ba8 100644
--- a/src/Cryptography/Algorithms/Hmac/AbstractHmac.php
+++ b/src/Cryptography/Algorithms/Hmac/AbstractHmac.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Hmac;
 
diff --git a/src/Cryptography/Algorithms/Hmac/HS256.php b/src/Cryptography/Algorithms/Hmac/HS256.php
index 622d92c..483ec73 100644
--- a/src/Cryptography/Algorithms/Hmac/HS256.php
+++ b/src/Cryptography/Algorithms/Hmac/HS256.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Hmac;
 
diff --git a/src/Cryptography/Algorithms/Hmac/HS384.php b/src/Cryptography/Algorithms/Hmac/HS384.php
index 8215034..ff56bfc 100644
--- a/src/Cryptography/Algorithms/Hmac/HS384.php
+++ b/src/Cryptography/Algorithms/Hmac/HS384.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Hmac;
 
diff --git a/src/Cryptography/Algorithms/Hmac/HS512.php b/src/Cryptography/Algorithms/Hmac/HS512.php
index 2ced3a1..01c5e1f 100644
--- a/src/Cryptography/Algorithms/Hmac/HS512.php
+++ b/src/Cryptography/Algorithms/Hmac/HS512.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Hmac;
 
diff --git a/src/Cryptography/Algorithms/Rsa/AbstractRsaSigner.php b/src/Cryptography/Algorithms/Rsa/AbstractRsaSigner.php
index 29c89bd..185689a 100644
--- a/src/Cryptography/Algorithms/Rsa/AbstractRsaSigner.php
+++ b/src/Cryptography/Algorithms/Rsa/AbstractRsaSigner.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Algorithms/Rsa/AbstractRsaVerifier.php b/src/Cryptography/Algorithms/Rsa/AbstractRsaVerifier.php
index 862f490..73ad754 100644
--- a/src/Cryptography/Algorithms/Rsa/AbstractRsaVerifier.php
+++ b/src/Cryptography/Algorithms/Rsa/AbstractRsaVerifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Algorithms/Rsa/Algorithm.php b/src/Cryptography/Algorithms/Rsa/Algorithm.php
index df9fdd3..05a065f 100644
--- a/src/Cryptography/Algorithms/Rsa/Algorithm.php
+++ b/src/Cryptography/Algorithms/Rsa/Algorithm.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Algorithms/Rsa/RS256Signer.php b/src/Cryptography/Algorithms/Rsa/RS256Signer.php
index 493f71d..2198915 100644
--- a/src/Cryptography/Algorithms/Rsa/RS256Signer.php
+++ b/src/Cryptography/Algorithms/Rsa/RS256Signer.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Algorithms/Rsa/RS256Verifier.php b/src/Cryptography/Algorithms/Rsa/RS256Verifier.php
index c88761e..ae0c700 100644
--- a/src/Cryptography/Algorithms/Rsa/RS256Verifier.php
+++ b/src/Cryptography/Algorithms/Rsa/RS256Verifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Algorithms/Rsa/RS384Signer.php b/src/Cryptography/Algorithms/Rsa/RS384Signer.php
index 10eb5ef..1072f94 100644
--- a/src/Cryptography/Algorithms/Rsa/RS384Signer.php
+++ b/src/Cryptography/Algorithms/Rsa/RS384Signer.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Algorithms/Rsa/RS384Verifier.php b/src/Cryptography/Algorithms/Rsa/RS384Verifier.php
index e618c11..81e76d0 100644
--- a/src/Cryptography/Algorithms/Rsa/RS384Verifier.php
+++ b/src/Cryptography/Algorithms/Rsa/RS384Verifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Algorithms/Rsa/RS512Signer.php b/src/Cryptography/Algorithms/Rsa/RS512Signer.php
index d086e92..2ef2d7f 100644
--- a/src/Cryptography/Algorithms/Rsa/RS512Signer.php
+++ b/src/Cryptography/Algorithms/Rsa/RS512Signer.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Algorithms/Rsa/RS512Verifier.php b/src/Cryptography/Algorithms/Rsa/RS512Verifier.php
index b7457cd..6f95ca9 100644
--- a/src/Cryptography/Algorithms/Rsa/RS512Verifier.php
+++ b/src/Cryptography/Algorithms/Rsa/RS512Verifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Algorithms\Rsa;
 
diff --git a/src/Cryptography/Keys/EcdsaPrivateKey.php b/src/Cryptography/Keys/EcdsaPrivateKey.php
index c482b2b..146f4ff 100644
--- a/src/Cryptography/Keys/EcdsaPrivateKey.php
+++ b/src/Cryptography/Keys/EcdsaPrivateKey.php
@@ -1,14 +1,15 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Keys;
 
 use MiladRahimi\Jwt\Exceptions\InvalidKeyException;
-use Throwable;
 
 class EcdsaPrivateKey
 {
     /**
-     * @var mixed Key file resource handler
+     * @var mixed Key resource handler
      */
     protected $resource;
 
@@ -23,7 +24,7 @@ class EcdsaPrivateKey
      */
     public function __construct(string $key, string $passphrase = '', ?string $id = null)
     {
-        $content = file_exists($key) ? file_get_contents($key) : $key;
+        $content = realpath($key) ? file_get_contents(realpath($key)) : $key;
 
         $this->resource = openssl_pkey_get_private($content, $passphrase);
         if ($this->resource === false) {
diff --git a/src/Cryptography/Keys/EcdsaPublicKey.php b/src/Cryptography/Keys/EcdsaPublicKey.php
index 0e43fca..381955a 100644
--- a/src/Cryptography/Keys/EcdsaPublicKey.php
+++ b/src/Cryptography/Keys/EcdsaPublicKey.php
@@ -1,14 +1,15 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Keys;
 
 use MiladRahimi\Jwt\Exceptions\InvalidKeyException;
-use Throwable;
 
 class EcdsaPublicKey
 {
     /**
-     * @var mixed Key file resource handler
+     * @var mixed Key resource handler
      */
     protected $resource;
 
@@ -22,7 +23,7 @@ class EcdsaPublicKey
      */
     public function __construct(string $key, ?string $id = null)
     {
-        $content = file_exists($key) ? file_get_contents($key) : $key;
+        $content = realpath($key) ? file_get_contents(realpath($key)) : $key;
 
         $this->resource = openssl_pkey_get_public($content);
         if ($this->resource === false) {
diff --git a/src/Cryptography/Keys/EdDsaPrivateKey.php b/src/Cryptography/Keys/EdDsaPrivateKey.php
index 6619565..7c60bb5 100644
--- a/src/Cryptography/Keys/EdDsaPrivateKey.php
+++ b/src/Cryptography/Keys/EdDsaPrivateKey.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Keys;
 
diff --git a/src/Cryptography/Keys/EdDsaPublicKey.php b/src/Cryptography/Keys/EdDsaPublicKey.php
index 88ca998..29a3595 100644
--- a/src/Cryptography/Keys/EdDsaPublicKey.php
+++ b/src/Cryptography/Keys/EdDsaPublicKey.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Keys;
 
diff --git a/src/Cryptography/Keys/HmacKey.php b/src/Cryptography/Keys/HmacKey.php
index 915edfe..8e1bbdd 100644
--- a/src/Cryptography/Keys/HmacKey.php
+++ b/src/Cryptography/Keys/HmacKey.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Keys;
 
diff --git a/src/Cryptography/Keys/RsaPrivateKey.php b/src/Cryptography/Keys/RsaPrivateKey.php
index 2c7b87b..2125ba8 100644
--- a/src/Cryptography/Keys/RsaPrivateKey.php
+++ b/src/Cryptography/Keys/RsaPrivateKey.php
@@ -1,14 +1,15 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Keys;
 
 use MiladRahimi\Jwt\Exceptions\InvalidKeyException;
-use Throwable;
 
 class RsaPrivateKey
 {
     /**
-     * @var mixed Key file resource handler
+     * @var mixed Key resource handler
      */
     protected $resource;
 
@@ -23,7 +24,7 @@ class RsaPrivateKey
      */
     public function __construct(string $key, string $passphrase = '', ?string $id = null)
     {
-        $content = file_exists($key) ? file_get_contents($key) : $key;
+        $content = realpath($key) ? file_get_contents(realpath($key)) : $key;
 
         $this->resource = openssl_pkey_get_private($content, $passphrase);
         if ($this->resource === false) {
diff --git a/src/Cryptography/Keys/RsaPublicKey.php b/src/Cryptography/Keys/RsaPublicKey.php
index 92b5e8a..51d34d9 100644
--- a/src/Cryptography/Keys/RsaPublicKey.php
+++ b/src/Cryptography/Keys/RsaPublicKey.php
@@ -1,14 +1,15 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography\Keys;
 
 use MiladRahimi\Jwt\Exceptions\InvalidKeyException;
-use Throwable;
 
 class RsaPublicKey
 {
     /**
-     * @var mixed Key file resource handler
+     * @var mixed Key resource handler
      */
     protected $resource;
 
@@ -22,7 +23,7 @@ class RsaPublicKey
      */
     public function __construct(string $key, ?string $id = null)
     {
-        $content = file_exists($key) ? file_get_contents($key) : $key;
+        $content = realpath($key) ? file_get_contents(realpath($key)) : $key;
 
         $this->resource = openssl_pkey_get_public($content);
         if ($this->resource === false) {
diff --git a/src/Cryptography/Signer.php b/src/Cryptography/Signer.php
index 63a9a66..0ee04fc 100644
--- a/src/Cryptography/Signer.php
+++ b/src/Cryptography/Signer.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography;
 
diff --git a/src/Cryptography/Verifier.php b/src/Cryptography/Verifier.php
index 958ec8d..e86272b 100644
--- a/src/Cryptography/Verifier.php
+++ b/src/Cryptography/Verifier.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Cryptography;
 
diff --git a/src/Enums/PublicClaimNames.php b/src/Enums/PublicClaimNames.php
index 73d127e..82cce29 100644
--- a/src/Enums/PublicClaimNames.php
+++ b/src/Enums/PublicClaimNames.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Enums;
 
@@ -9,11 +11,11 @@
  */
 class PublicClaimNames
 {
-    const ISSUER = 'iss';
-    const SUBJECT = 'sub';
-    const AUDIENCE = 'aud';
-    const EXPIRATION_TIME = 'exp';
-    const NOT_BEFORE = 'nbf';
-    const ISSUED_AT = 'iat';
-    const JTI = 'jti';
+    public const ISSUER = 'iss';
+    public const SUBJECT = 'sub';
+    public const AUDIENCE = 'aud';
+    public const EXPIRATION_TIME = 'exp';
+    public const NOT_BEFORE = 'nbf';
+    public const ISSUED_AT = 'iat';
+    public const JTI = 'jti';
 }
diff --git a/src/Exceptions/InvalidKeyException.php b/src/Exceptions/InvalidKeyException.php
index 6238972..28f2911 100644
--- a/src/Exceptions/InvalidKeyException.php
+++ b/src/Exceptions/InvalidKeyException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Exceptions/InvalidSignatureException.php b/src/Exceptions/InvalidSignatureException.php
index b0b2e58..8966211 100644
--- a/src/Exceptions/InvalidSignatureException.php
+++ b/src/Exceptions/InvalidSignatureException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Exceptions/InvalidTokenException.php b/src/Exceptions/InvalidTokenException.php
index 87a978f..345d42e 100644
--- a/src/Exceptions/InvalidTokenException.php
+++ b/src/Exceptions/InvalidTokenException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Exceptions/JsonDecodingException.php b/src/Exceptions/JsonDecodingException.php
index da712bb..b583548 100644
--- a/src/Exceptions/JsonDecodingException.php
+++ b/src/Exceptions/JsonDecodingException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Exceptions/JsonEncodingException.php b/src/Exceptions/JsonEncodingException.php
index f579f28..50780fd 100644
--- a/src/Exceptions/JsonEncodingException.php
+++ b/src/Exceptions/JsonEncodingException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Exceptions/NoKidException.php b/src/Exceptions/NoKidException.php
index 241b24a..1b7a059 100644
--- a/src/Exceptions/NoKidException.php
+++ b/src/Exceptions/NoKidException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Exceptions/SigningException.php b/src/Exceptions/SigningException.php
index ca5c0be..d2125d3 100644
--- a/src/Exceptions/SigningException.php
+++ b/src/Exceptions/SigningException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Exceptions/ValidationException.php b/src/Exceptions/ValidationException.php
index 7579e5b..f2f2d8e 100644
--- a/src/Exceptions/ValidationException.php
+++ b/src/Exceptions/ValidationException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Exceptions/VerifierNotFoundException.php b/src/Exceptions/VerifierNotFoundException.php
index 6c0e4b9..64713e1 100644
--- a/src/Exceptions/VerifierNotFoundException.php
+++ b/src/Exceptions/VerifierNotFoundException.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Exceptions;
 
diff --git a/src/Generator.php b/src/Generator.php
index 6e93e51..1125906 100644
--- a/src/Generator.php
+++ b/src/Generator.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt;
 
diff --git a/src/Json/JsonParser.php b/src/Json/JsonParser.php
index 4d44bde..80716ed 100644
--- a/src/Json/JsonParser.php
+++ b/src/Json/JsonParser.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Json;
 
diff --git a/src/Json/StrictJsonParser.php b/src/Json/StrictJsonParser.php
index 33eb1ef..a0b60e8 100644
--- a/src/Json/StrictJsonParser.php
+++ b/src/Json/StrictJsonParser.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Json;
 
diff --git a/src/Parser.php b/src/Parser.php
index a403675..a0ab7fc 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt;
 
@@ -34,8 +36,7 @@ public function __construct(
         ?Validator    $validator = null,
         ?JsonParser   $jsonParser = null,
         ?Base64Parser $base64Parser = null
-    )
-    {
+    ) {
         $this->verifier = $verifier;
         $this->validator = $validator ?: new DefaultValidator();
         $this->jsonParser = $jsonParser ?: new StrictJsonParser();
diff --git a/src/Validator/BaseValidator.php b/src/Validator/BaseValidator.php
index a703d86..adb6be7 100644
--- a/src/Validator/BaseValidator.php
+++ b/src/Validator/BaseValidator.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator;
 
diff --git a/src/Validator/DefaultValidator.php b/src/Validator/DefaultValidator.php
index 7ff82fb..6d54aa0 100644
--- a/src/Validator/DefaultValidator.php
+++ b/src/Validator/DefaultValidator.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator;
 
diff --git a/src/Validator/Rule.php b/src/Validator/Rule.php
index f3801ea..314d882 100644
--- a/src/Validator/Rule.php
+++ b/src/Validator/Rule.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator;
 
diff --git a/src/Validator/Rules/ConsistsOf.php b/src/Validator/Rules/ConsistsOf.php
index 1bdc06b..79aa9d9 100644
--- a/src/Validator/Rules/ConsistsOf.php
+++ b/src/Validator/Rules/ConsistsOf.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/EqualsTo.php b/src/Validator/Rules/EqualsTo.php
index 7adabad..4184ddf 100644
--- a/src/Validator/Rules/EqualsTo.php
+++ b/src/Validator/Rules/EqualsTo.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/GreaterThan.php b/src/Validator/Rules/GreaterThan.php
index fe09d47..a59a220 100644
--- a/src/Validator/Rules/GreaterThan.php
+++ b/src/Validator/Rules/GreaterThan.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/GreaterThanOrEqualTo.php b/src/Validator/Rules/GreaterThanOrEqualTo.php
index fbc50fe..571b177 100644
--- a/src/Validator/Rules/GreaterThanOrEqualTo.php
+++ b/src/Validator/Rules/GreaterThanOrEqualTo.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/IdenticalTo.php b/src/Validator/Rules/IdenticalTo.php
index 9206afd..ccea7c7 100644
--- a/src/Validator/Rules/IdenticalTo.php
+++ b/src/Validator/Rules/IdenticalTo.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/LessThan.php b/src/Validator/Rules/LessThan.php
index 4461f0a..33f2b74 100644
--- a/src/Validator/Rules/LessThan.php
+++ b/src/Validator/Rules/LessThan.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/LessThanOrEqualTo.php b/src/Validator/Rules/LessThanOrEqualTo.php
index 3fede08..26e953e 100644
--- a/src/Validator/Rules/LessThanOrEqualTo.php
+++ b/src/Validator/Rules/LessThanOrEqualTo.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/NewerThan.php b/src/Validator/Rules/NewerThan.php
index 994de7b..5a3be3d 100644
--- a/src/Validator/Rules/NewerThan.php
+++ b/src/Validator/Rules/NewerThan.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/NewerThanOrSame.php b/src/Validator/Rules/NewerThanOrSame.php
index 0d37d56..fd6f8b2 100644
--- a/src/Validator/Rules/NewerThanOrSame.php
+++ b/src/Validator/Rules/NewerThanOrSame.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/NotEmpty.php b/src/Validator/Rules/NotEmpty.php
index fbc300f..1c6a744 100644
--- a/src/Validator/Rules/NotEmpty.php
+++ b/src/Validator/Rules/NotEmpty.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/NotNull.php b/src/Validator/Rules/NotNull.php
index f95decf..de03f63 100644
--- a/src/Validator/Rules/NotNull.php
+++ b/src/Validator/Rules/NotNull.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/OlderThan.php b/src/Validator/Rules/OlderThan.php
index 612d4a3..112bafd 100644
--- a/src/Validator/Rules/OlderThan.php
+++ b/src/Validator/Rules/OlderThan.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Rules/OlderThanOrSame.php b/src/Validator/Rules/OlderThanOrSame.php
index fa56f17..427ee27 100644
--- a/src/Validator/Rules/OlderThanOrSame.php
+++ b/src/Validator/Rules/OlderThanOrSame.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator\Rules;
 
diff --git a/src/Validator/Validator.php b/src/Validator/Validator.php
index 42f106b..dab96d0 100644
--- a/src/Validator/Validator.php
+++ b/src/Validator/Validator.php
@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace MiladRahimi\Jwt\Validator;
 
diff --git a/src/VerifierFactory.php b/src/VerifierFactory.php
index 23c1ac1..6998243 100644
--- a/src/VerifierFactory.php
+++ b/src/VerifierFactory.php
@@ -78,4 +78,4 @@ private function extractHeader(string $jwt): string
 
         return $sections[0];
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ExamplesTest.php b/tests/ExamplesTest.php
index 5accfe7..bb81137 100644
--- a/tests/ExamplesTest.php
+++ b/tests/ExamplesTest.php
@@ -117,12 +117,16 @@ public function test_eddsa_algorithms()
     public function test_multiple_keys()
     {
         $privateKey1 = new RsaPrivateKey(
-            __DIR__ . '/../assets/keys/rsa-private.pem', '', 'key-1'
+            __DIR__ . '/../assets/keys/rsa-private.pem',
+            '',
+            'key-1'
         );
         $publicKey1 = new RsaPublicKey(__DIR__ . '/../assets/keys/rsa-public.pem', 'key-1');
 
         $privateKey2 = new EcdsaPrivateKey(
-            __DIR__ . '/../assets/keys/ecdsa384-private.pem', '', 'key-2'
+            __DIR__ . '/../assets/keys/ecdsa384-private.pem',
+            '',
+            'key-2'
         );
         $publicKey2 = new EcdsaPublicKey(__DIR__ . '/../assets/keys/ecdsa384-public.pem', 'key-2');
 
diff --git a/tests/VerifierFactoryTest.php b/tests/VerifierFactoryTest.php
index af2afc5..016b7aa 100644
--- a/tests/VerifierFactoryTest.php
+++ b/tests/VerifierFactoryTest.php
@@ -25,7 +25,9 @@ class VerifierFactoryTest extends TestCase
     public function test_getVerifier_it_should_return_the_right_verifier()
     {
         $privateKey = new RsaPrivateKey(
-            __DIR__ . '/../assets/keys/rsa-private.pem', '', 'key-1'
+            __DIR__ . '/../assets/keys/rsa-private.pem',
+            '',
+            'key-1'
         );
         $publicKey = new RsaPublicKey(__DIR__ . '/../assets/keys/rsa-public.pem', 'key-1');