diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 57f081a..3e0457d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,7 +1,8 @@
 name: Build
 
-on: [ push, pull_request ]
-
+on:
+  - pull_request
+  - push
 jobs:
   tests:
     runs-on: "ubuntu-latest"
@@ -12,7 +13,7 @@ jobs:
           - "8.3"
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v2"
+        uses: "actions/checkout@v4"
 
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
@@ -21,11 +22,10 @@ jobs:
           tools: "cs2pr"
 
       - name: "Install dependencies with Composer"
-        uses: "ramsey/composer-install@v2"
+        uses: "ramsey/composer-install@v3"
 
-      - name: "Run phpcs"
-        if: ${{ matrix.php-version == '8.3' }}
-        run: "vendor/bin/phpcs -n -s --report=checkstyle | cs2pr"
+      - name: "Run PHP CS Fixer"
+        run: "./vendor/bin/php-cs-fixer fix --format checkstyle | cs2pr"
 
       - name: "Run PHPUnit"
         run: "vendor/bin/phpunit"
diff --git a/.gitignore b/.gitignore
index 8e26f45..ec2000c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ vendor
 composer.lock
 .idea
 .phpunit.result.cache
+.php-cs-fixer.cache
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
new file mode 100644
index 0000000..1a07c4d
--- /dev/null
+++ b/.php-cs-fixer.dist.php
@@ -0,0 +1,12 @@
+<?php
+
+$finder = (new PhpCsFixer\Finder())
+    ->in(['src', 'tests'])
+;
+
+return (new PhpCsFixer\Config())
+    ->setRules([
+        '@PSR12' => true,
+    ])
+    ->setFinder($finder)
+    ;
diff --git a/README.md b/README.md
index 0b5f745..7809716 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ This is a simple PHP library to help you deal with Europe's VAT rules.
 
 ## Installation
 
-[PHP](https://php.net) version 8.1 or higher with the CURL and JSON extension is required.
+[PHP](https://php.net) version 8.2 or higher with the CURL and JSON extension is required.
 
 For VAT number existence checking, the PHP SOAP extension is required as well.
 
diff --git a/composer.json b/composer.json
index 213ac88..0fe3f11 100755
--- a/composer.json
+++ b/composer.json
@@ -10,13 +10,13 @@
     }
   ],
   "require": {
-    "php": ">=8.1",
+    "php": ">=8.2",
     "ext-curl": "*",
     "ext-json": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "^9.5",
-    "squizlabs/php_codesniffer": "^3.5"
+    "phpunit/phpunit": "^11.1",
+    "friendsofphp/php-cs-fixer": "^3.54"
   },
   "autoload": {
     "psr-4": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 812ee72..fe907ce 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,31 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit backupGlobals="false"
-         backupStaticAttributes="false"
-         beStrictAboutTestsThatDoNotTestAnything="true"
-         beStrictAboutOutputDuringTests="true"
-         bootstrap="vendor/autoload.php"
-         colors="true"
-         convertErrorsToExceptions="false"
-         convertNoticesToExceptions="false"
-         convertWarningsToExceptions="false"
-         failOnRisky="true"
-         failOnWarning="true"
-         processIsolation="false"
-         stopOnError="false"
-         stopOnFailure="false"
-         verbose="true"
->
-    <testsuites>
-        <testsuite name="VAT Test Suite">
-            <directory suffix="Test.php">./tests</directory>
-        </testsuite>
-    </testsuites>
-    <coverage processUncoveredFiles="true">
-        <include>
-            <directory suffix=".php">./src</directory>
-        </include>
-    </coverage>
-    <php>
-        <ini name="error_reporting" value="-1"/>
-    </php>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" beStrictAboutTestsThatDoNotTestAnything="true" beStrictAboutOutputDuringTests="true" bootstrap="vendor/autoload.php" colors="true" failOnRisky="true" failOnWarning="true" processIsolation="false" stopOnError="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.1/phpunit.xsd" cacheDirectory=".phpunit.cache" backupStaticProperties="false">
+  <testsuites>
+    <testsuite name="VAT Test Suite">
+      <directory suffix="Test.php">./tests</directory>
+    </testsuite>
+  </testsuites>
+  <php>
+    <ini name="error_reporting" value="-1"/>
+  </php>
+  <source>
+    <include>
+      <directory suffix=".php">./src</directory>
+    </include>
+  </source>
 </phpunit>
diff --git a/src/Rates.php b/src/Rates.php
index 533c7b2..cd7ae67 100644
--- a/src/Rates.php
+++ b/src/Rates.php
@@ -71,7 +71,7 @@ private function loadFromFile(): void
             throw new Exception("Unserializable file content");
         }
 
-        $data = unserialize($contents, [
+        $data = @unserialize($contents, [
             'allowed_classes' => [
                 Period::class,
                 DateTimeImmutable::class
@@ -153,7 +153,6 @@ public function getRateForCountry(string $countryCode, string $level = self::RAT
      */
     public function getRateForCountryOnDate(string $countryCode, \DateTimeInterface $datetime, string $level = self::RATE_STANDARD): float
     {
-        $activePeriod = $this->resolvePeriod($countryCode, $datetime);
-        return $activePeriod->getRate($level);
+        return $this->resolvePeriod($countryCode, $datetime)->getRate($level);
     }
 }
diff --git a/src/Vies/Client.php b/src/Vies/Client.php
index 67134aa..2b9ae44 100644
--- a/src/Vies/Client.php
+++ b/src/Vies/Client.php
@@ -43,6 +43,19 @@ public function __construct(int $timeout = 10)
      * @throws ViesException
      */
     public function checkVat(string $countryCode, string $vatNumber): bool
+    {
+        return (bool)$this->getInfo($countryCode, $vatNumber)->valid;
+    }
+
+    /**
+     * @param string $countryCode
+     * @param string $vatNumber
+     *
+     * @return object
+     *
+     * @throws ViesException
+     */
+    public function getInfo(string $countryCode, string $vatNumber): object
     {
         try {
             $response = $this->getClient()->checkVat(
@@ -55,7 +68,7 @@ public function checkVat(string $countryCode, string $vatNumber): bool
             throw new ViesException($e->getMessage(), $e->getCode());
         }
 
-        return (bool) $response->valid;
+        return $response;
     }
 
     /**
diff --git a/tests/Clients/ClientsTest.php b/tests/Clients/ClientsTest.php
index e3d2055..0f87972 100644
--- a/tests/Clients/ClientsTest.php
+++ b/tests/Clients/ClientsTest.php
@@ -2,18 +2,21 @@
 
 namespace Ibericode\Vat\Tests\Clients;
 
+use Ibericode\Vat\Clients\ClientException;
 use Ibericode\Vat\Clients\IbericodeVatRatesClient;
 use Ibericode\Vat\Clients\Client;
 use Ibericode\Vat\Period;
+use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 
 class ClientsTest extends TestCase
 {
     /**
      * @group remote-http
-     * @dataProvider clientProvider
+     * @throws ClientException
      */
-    public function testClient(Client $client)
+    #[DataProvider('clientsProvider')]
+    public function testClient(Client $client): void
     {
         $data = $client->fetch();
         $this->assertIsArray($data);
@@ -22,7 +25,7 @@ public function testClient(Client $client)
         $this->assertInstanceOf(Period::class, $data['NL'][0]);
     }
 
-    public function clientProvider()
+    public static function clientsProvider(): \Generator
     {
         yield [new IbericodeVatRatesClient()];
     }
diff --git a/tests/CountriesTest.php b/tests/CountriesTest.php
index 85381bc..d97d13e 100644
--- a/tests/CountriesTest.php
+++ b/tests/CountriesTest.php
@@ -9,14 +9,14 @@
 
 class CountriesTest extends TestCase
 {
-    public function testIterator()
+    public function testIterator(): void
     {
         $countries = new Countries();
 
         $this->assertCount(249, $countries);
     }
 
-    public function testArrayAccess()
+    public function testArrayAccess(): void
     {
         $countries = new Countries();
 
@@ -27,35 +27,35 @@ public function testArrayAccess()
         $countries['FOO'];
     }
 
-    public function testArrayAccessWithInvalidCountryCode()
+    public function testArrayAccessWithInvalidCountryCode(): void
     {
         $countries = new Countries();
         $this->expectException(Exception::class);
         $countries['FOO'];
     }
 
-    public function testArrayAccessSetValue()
+    public function testArrayAccessSetValue(): void
     {
         $countries = new Countries();
         $this->expectException(Exception::class);
         $countries['FOO'] = 'bar';
     }
 
-    public function testArrayAccessUnsetValue()
+    public function testArrayAccessUnsetValue(): void
     {
         $countries = new Countries();
         $this->expectException(Exception::class);
         unset($countries['FOO']);
     }
 
-    public function testHasCode()
+    public function testHasCode(): void
     {
         $countries = new Countries();
         $this->assertFalse($countries->hasCountryCode('FOO'));
         $this->assertTrue($countries->hasCountryCode('NL'));
     }
 
-    public function testIsCodeInEU()
+    public function testIsCodeInEU(): void
     {
         $countries = new Countries();
         $this->assertFalse($countries->isCountryCodeInEU('FOO'));
diff --git a/tests/GeolocatorTest.php b/tests/GeolocatorTest.php
index 9f2c2ba..137ffdc 100644
--- a/tests/GeolocatorTest.php
+++ b/tests/GeolocatorTest.php
@@ -3,22 +3,23 @@
 namespace Ibericode\Vat\Tests;
 
 use Ibericode\Vat\Geolocator;
+use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 
 class GeolocatorTest extends TestCase
 {
     /**
-     * @dataProvider provider
      * @group remote-http
      */
-    public function testClient($service)
+    #[DataProvider('servicesProvider')]
+    public function testService($service): void
     {
         $geolocator = new Geolocator($service);
         $country = $geolocator->locateIpAddress('8.8.8.8');
         $this->assertEquals('US', $country);
     }
 
-    public function provider()
+    public static function servicesProvider(): \Generator
     {
         yield ['ip2c.org'];
     }
diff --git a/tests/RatesTest.php b/tests/RatesTest.php
index 12e865b..0bb596f 100644
--- a/tests/RatesTest.php
+++ b/tests/RatesTest.php
@@ -19,7 +19,7 @@ protected function setUp(): void
         }
     }
 
-    private function getRatesClientMock()
+    private function getRatesClientMock(): \PHPUnit\Framework\MockObject\MockObject
     {
         $client = $this->getMockBuilder(IbericodeVatRatesClient::class)
             ->getMock();
diff --git a/tests/ValidatorTest.php b/tests/ValidatorTest.php
index 847bc49..64d78f8 100644
--- a/tests/ValidatorTest.php
+++ b/tests/ValidatorTest.php
@@ -3,6 +3,7 @@
 namespace Ibericode\Vat\Tests;
 
 use Ibericode\Vat\Validator;
+use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -12,9 +13,9 @@
 class ValidatorTest extends TestCase
 {
     /**
-     * @covers Validator::validateVatNumberFormat
+     * @coversXXX Validator::validateVatNumberFormat
      */
-    public function testValidateVatNumberFormat()
+    public function testValidateVatNumberFormat(): void
     {
         $valid = [
             'ATU12345678',
@@ -118,16 +119,14 @@ public function testValidateVatNumberFormat()
         }
     }
 
-    /**
-     * @dataProvider validIpAddresses
-     */
-    public function testValidateIpAddressWithValid($value)
+    #[DataProvider('validIpAddresses')]
+    public function testValidateIpAddressWithValid($value): void
     {
         $validator = new Validator();
         $this->assertTrue($validator->validateIpAddress($value));
     }
 
-    public function validIpAddresses()
+    public static function validIpAddresses(): array
     {
         return [
             ['8.8.8.8'],
@@ -135,16 +134,14 @@ public function validIpAddresses()
         ];
     }
 
-    /**
-     * @dataProvider invalidIpAddresses
-     */
-    public function testValidateIpAddressWithInvalidValues($value)
+    #[DataProvider('invalidIpAddresses')]
+    public function testValidateIpAddressWithInvalidValues($value): void
     {
         $validator = new Validator();
         $this->assertFalse($validator->validateIpAddress($value));
     }
 
-    public function invalidIpAddresses()
+    public static function invalidIpAddresses(): array
     {
         return [
             ['0.8.8.8.8'],
@@ -153,18 +150,14 @@ public function invalidIpAddresses()
         ];
     }
 
-    /**
-     * @dataProvider validCountryCodes
-     */
-    public function testValidateCountryCodeWithValidValues($value)
+    #[DataProvider('validCountryCodes')]
+    public function testValidateCountryCodeWithValidValues($value): void
     {
         $validator = new Validator();
         $this->assertTrue($validator->validateCountryCode($value));
     }
 
-    /**
-     * @dataProvider invalidCountryCodes
-     */
+    #[DataProvider('invalidCountryCodes')]
     public function testValidateCountryCodeWithInvalidValues($value)
     {
         $validator = new Validator();
@@ -172,7 +165,7 @@ public function testValidateCountryCodeWithInvalidValues($value)
     }
 
 
-    public function validCountryCodes()
+    public static function validCountryCodes(): array
     {
         return [
            ['NL'],
@@ -182,7 +175,7 @@ public function validCountryCodes()
         ];
     }
 
-    public function invalidCountryCodes()
+    public static function invalidCountryCodes(): array
     {
         return [
             ['FOO'],