diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..39b22e7
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,25 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.php]
+indent_style = space
+indent_size = 4
+
+[*.{yaml,yml,neon}]
+indent_style = space
+indent_size = 4
+
+[*.{json,js}]
+indent_style = space
+indent_size = 2
+
+[Makefile]
+indent_style = tab
+
+[*.md]
+trim_trailing_whitespace = false
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 365c6af..d25d9db 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,10 +4,10 @@ on: [push]
 jobs:
   tests:
     name: Tests
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
-        version: ['8.1']
+        version: ['8.2', '8.3', '8.4']
         flags: ['', '--prefer-lowest']
       fail-fast: false
     steps:
@@ -15,6 +15,6 @@ jobs:
       - uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.version }}
-          coverage: xdebug2
+          coverage: xdebug
       - run: composer update --prefer-dist --no-interaction ${{ matrix.flags }}
       - run: vendor/bin/atoum
diff --git a/.gitignore b/.gitignore
index 7579f74..408b291 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 vendor
 composer.lock
+/.php-cs-fixer.cache
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
new file mode 100644
index 0000000..46dbe3f
--- /dev/null
+++ b/.php-cs-fixer.dist.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+use PhpCsFixer\Config;
+use PhpCsFixer\Finder;
+
+$finder = Finder::create()
+    ->in(__DIR__ . '/src')
+    ->exclude('vendor')
+    ->name('*.php');
+
+return (new Config())
+    ->setRiskyAllowed(true)
+    ->setRules([
+        '@Symfony' => true,
+        '@Symfony:risky' => true,
+        '@PHP82Migration' => true,
+        '@PHP80Migration:risky' => true,
+        'declare_strict_types' => false,
+        'ordered_imports' => [
+            'sort_algorithm' => 'alpha'
+        ],
+        'no_unused_imports' => true,
+        'array_syntax' => ['syntax' => 'short'],
+        'concat_space' => ['spacing' => 'one'],
+        'phpdoc_order' => true,
+        'phpdoc_separation' => true,
+        'global_namespace_import' => ['import_classes' => false],
+        'native_function_invocation' => [
+            'include' => [
+                '@compiler_optimized'
+            ], 'scope' => 'namespaced'
+        ],
+    ])
+    ->setFinder($finder);
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..4ba2ad6
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,32 @@
+.PHONY: help rector rector-dry rector-fix cs cs-fix phpstan
+
+help:
+	@echo "Available commands:"
+	@echo "  make rector-fix      - Run Rector and apply changes"
+	@echo "  make rector-dry      - Run Rector in dry-run mode (no modifications)"
+	@echo "  make cs              - Run PHP CS Fixer in check mode (no modifications)"
+	@echo "  make cs-fix          - Run PHP CS Fixer and apply changes"
+	@echo "  make phpstan         - Run PHPStan static analysis"
+
+
+rector: rector-dry
+
+rector-dry:
+	@echo "Running Rector in dry-run mode..."
+	@./vendor/bin/rector process --dry-run
+
+rector-fix:
+	@echo "Running Rector and applying changes..."
+	@./vendor/bin/rector process
+
+cs:
+	@echo "Running PHP CS Fixer in check mode..."
+	@./vendor/bin/php-cs-fixer check --diff
+
+cs-fix:
+	@echo "Running PHP CS Fixer and applying changes..."
+	@./vendor/bin/php-cs-fixer fix
+
+phpstan:
+	@echo "Running PHPStan..."
+	@./vendor/bin/phpstan analyse -c phpstan.dist.neon
diff --git a/composer.json b/composer.json
index aa8baa5..d70f70d 100644
--- a/composer.json
+++ b/composer.json
@@ -13,17 +13,27 @@
         }
     ],
     "require": {
-        "php": ">=8.1",
+        "php": ">=8.2",
         "symfony/framework-bundle": "~5.0 || ~6.0 || ~7.0",
         "symfony/monolog-bundle": "~3.0",
         "symfony/expression-language": "~5.0 || ~6.0 || ~7.0",
-        "monolog/monolog": "^3.0"
+        "monolog/monolog": "^3.10"
     },
     "require-dev": {
-        "atoum/atoum": "~3.4 || ~4.0",
-        "symfony/yaml": "~5.0 || ~6.0 || ~7.0"
+        "atoum/atoum": "~4.0",
+        "symfony/yaml": "~5.0 || ~6.0 || ~7.0",
+        "rector/rector": "^2.4",
+        "friendsofphp/php-cs-fixer": "^3.95",
+        "phpstan/phpstan": "^2.1",
+        "phpstan/extension-installer": "^1.4",
+        "phpstan/phpstan-symfony": "^2.0"
     },
     "autoload": {
         "psr-0": { "": "src/" }
+    },
+    "config": {
+        "allow-plugins": {
+            "phpstan/extension-installer": true
+        }
     }
 }
diff --git a/phpstan.dist.neon b/phpstan.dist.neon
new file mode 100644
index 0000000..b581d55
--- /dev/null
+++ b/phpstan.dist.neon
@@ -0,0 +1,10 @@
+parameters:
+    level: 10
+    paths:
+        - src
+    excludePaths:
+        - src/M6Web/Bundle/MonologExtraBundle/Tests
+    symfony:
+        containerXmlPath: null
+    ignoreErrors: []
+    reportUnmatchedIgnoredErrors: true
diff --git a/rector.php b/rector.php
new file mode 100644
index 0000000..ddd5fe5
--- /dev/null
+++ b/rector.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\Set\ValueObject\SetList;
+use Rector\ValueObject\PhpVersion;
+
+return RectorConfig::configure()
+    ->withPaths([
+        __DIR__ . '/src',
+    ])
+    ->withSkip([
+        __DIR__ . '/vendor',
+    ])
+    ->withPhpVersion(PhpVersion::PHP_82)
+    ->withComposerBased(
+        phpunit: true,
+        symfony: true,
+    )
+    ->withSets([
+        SetList::PHP_82,
+    ]);
diff --git a/src/M6Web/Bundle/MonologExtraBundle/DependencyInjection/Configuration.php b/src/M6Web/Bundle/MonologExtraBundle/DependencyInjection/Configuration.php
index 3c45a1d..da77c3b 100644
--- a/src/M6Web/Bundle/MonologExtraBundle/DependencyInjection/Configuration.php
+++ b/src/M6Web/Bundle/MonologExtraBundle/DependencyInjection/Configuration.php
@@ -6,13 +6,10 @@
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 
 /**
- * This is the class that validates and merges configuration from your app/config files
+ * This is the class that validates and merges configuration from your app/config files.
  */
 class Configuration implements ConfigurationInterface
 {
-    /**
-     * {@inheritDoc}
-     */
     public function getConfigTreeBuilder(): TreeBuilder
     {
         $treeBuilder = new TreeBuilder('m6_web_monolog_extra');
@@ -29,9 +26,7 @@ public function getConfigTreeBuilder(): TreeBuilder
                             ->variableNode('config')->end()
                         ->end()
                         ->validate()
-                            ->ifTrue(function ($v) {
-                                return isset($v['handler']) && isset($v['channel']);
-                            })
+                            ->ifTrue(static fn ($v) => is_array($v) && isset($v['handler'], $v['channel']))
                             ->thenInvalid('You can define a channel or a handler but not both.')
                         ->end()
                     ->end()
diff --git a/src/M6Web/Bundle/MonologExtraBundle/DependencyInjection/M6WebMonologExtraExtension.php b/src/M6Web/Bundle/MonologExtraBundle/DependencyInjection/M6WebMonologExtraExtension.php
index 2069dc7..06d969f 100644
--- a/src/M6Web/Bundle/MonologExtraBundle/DependencyInjection/M6WebMonologExtraExtension.php
+++ b/src/M6Web/Bundle/MonologExtraBundle/DependencyInjection/M6WebMonologExtraExtension.php
@@ -2,54 +2,50 @@
 
 namespace M6Web\Bundle\MonologExtraBundle\DependencyInjection;
 
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\Config\FileLocator;
 use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 /**
- * This is the class that loads and manages your bundle configuration
+ * This is the class that loads and manages your bundle configuration.
  */
 class M6WebMonologExtraExtension extends Extension
 {
-    /**
-     * {@inheritDoc}
-     */
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
-        $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
+        $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
         $loader->load('processors.yml');
 
         $configuration = new Configuration();
+        /** @var array{processors: array<int|string, array{type: string, handler?: string, channel?: string, config?: mixed}>} $config */
         $config = $this->processConfiguration($configuration, $configs);
 
         if (!empty($config['processors'])) {
             $alias = $this->getAlias();
 
             foreach ($config['processors'] as $name => $processor) {
-                $serviceId      = sprintf('%s.processor.%s', $alias, is_int($name) ? uniqid() : $name);
+                $serviceId = \sprintf('%s.processor.%s', $alias, \is_int($name) ? uniqid() : $name);
 
                 $tagOptions = [];
-                if (array_key_exists('channel', $processor)) {
+                if (\array_key_exists('channel', $processor)) {
                     $tagOptions['channel'] = $processor['channel'];
                 }
-                if (array_key_exists('handler', $processor)) {
+                if (\array_key_exists('handler', $processor)) {
                     $tagOptions['handler'] = $processor['handler'];
                 }
 
-                $definition = clone $container->getDefinition(sprintf('%s.processor.%s', $alias, lcfirst($processor['type'])));
+                $definition = clone $container->getDefinition(\sprintf('%s.processor.%s', $alias, lcfirst($processor['type'])));
                 $definition->setAbstract(false);
                 $definition->addtag('monolog.processor', $tagOptions);
 
-                if (array_key_exists('config', $processor)) {
+                if (\array_key_exists('config', $processor)) {
                     if ($definition->hasMethodCall('setConfiguration')) {
                         $definition->removeMethodCall('setConfiguration');
                         $definition->addMethodCall('setConfiguration', [$processor['config']]);
                     } else {
-                        throw new InvalidConfigurationException(
-                            sprintf('"%s" processor is not configurable.', $processor['type'])
-                        );
+                        throw new InvalidConfigurationException(\sprintf('"%s" processor is not configurable.', $processor['type']));
                     }
                 }
 
diff --git a/src/M6Web/Bundle/MonologExtraBundle/M6WebMonologExtraBundle.php b/src/M6Web/Bundle/MonologExtraBundle/M6WebMonologExtraBundle.php
index 1966c19..ca25687 100644
--- a/src/M6Web/Bundle/MonologExtraBundle/M6WebMonologExtraBundle.php
+++ b/src/M6Web/Bundle/MonologExtraBundle/M6WebMonologExtraBundle.php
@@ -5,7 +5,7 @@
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 
 /**
- * Bundle class
+ * Bundle class.
  */
 class M6WebMonologExtraBundle extends Bundle
 {
diff --git a/src/M6Web/Bundle/MonologExtraBundle/Processor/ContextInformationProcessor.php b/src/M6Web/Bundle/MonologExtraBundle/Processor/ContextInformationProcessor.php
index d76e9f1..463b0c3 100644
--- a/src/M6Web/Bundle/MonologExtraBundle/Processor/ContextInformationProcessor.php
+++ b/src/M6Web/Bundle/MonologExtraBundle/Processor/ContextInformationProcessor.php
@@ -1,4 +1,5 @@
 <?php
+
 namespace M6Web\Bundle\MonologExtraBundle\Processor;
 
 use Monolog\LogRecord;
@@ -7,8 +8,8 @@
 
 class ContextInformationProcessor
 {
-    protected $container;
-    protected $expressionLanguage;
+    protected ContainerInterface $container;
+    protected ExpressionLanguage $expressionLanguage;
 
     public function __construct(ContainerInterface $container, ExpressionLanguage $expressionLanguage)
     {
@@ -16,56 +17,40 @@ public function __construct(ContainerInterface $container, ExpressionLanguage $e
         $this->expressionLanguage = $expressionLanguage;
     }
 
-    /**
-     * Processor configuration
-     *
-     * @var array
-     */
-    protected $configuration;
+    /** @var array<string, string> */
+    protected array $configuration;
 
     public function __invoke(LogRecord $record): LogRecord
     {
         return $record->with(
-            context: array_merge($this->evaluateConfiguration(), $record['context'])
+            context: array_merge($this->evaluateConfiguration(), $record->context)
         );
     }
 
-    /**
-     * Define processor configuration
-     *
-     * @param array $config
-     */
-    public function setConfiguration(array $config)
+    /** @param array<string, string> $config */
+    public function setConfiguration(array $config): void
     {
         $this->configuration = $config;
     }
 
-    /**
-     * Evaluate configuration array
-     *
-     * @return array
-     */
-    protected function evaluateConfiguration()
+    /** @return array<string, string> */
+    protected function evaluateConfiguration(): array
     {
-        $context = [];
-        foreach ($this->configuration as $key => $value) {
-            $context[$key] = $this->evaluateValue($value);
-        }
-
-        return $context;
+        return array_map(fn ($value) => $this->evaluateValue($value), $this->configuration);
     }
 
     /**
-     * Evaluate configuration value
-     *
-     * @param string $value
-     *
-     * @return string
+     * Evaluate configuration value.
      */
-    protected function evaluateValue($value)
+    protected function evaluateValue(string $value): string
     {
         if (preg_match('/^expr\((.*)\)$/', $value, $matches)) {
-            return $this->expressionLanguage->evaluate($matches[1], ['container' => $this->container]);
+            $result = $this->expressionLanguage->evaluate($matches[1], ['container' => $this->container]);
+            if (!is_string($result)) {
+                throw new \UnexpectedValueException(\sprintf('Expression "%s" must evaluate to a string, got %s.', $matches[1], get_debug_type($result)));
+            }
+
+            return $result;
         }
 
         return $value;
diff --git a/src/M6Web/Bundle/MonologExtraBundle/Tests/Units/DependencyInjection/M6WebMonologExtraExtension.php b/src/M6Web/Bundle/MonologExtraBundle/Tests/Units/DependencyInjection/M6WebMonologExtraExtension.php
index 3f5c9db..5f47a21 100644
--- a/src/M6Web/Bundle/MonologExtraBundle/Tests/Units/DependencyInjection/M6WebMonologExtraExtension.php
+++ b/src/M6Web/Bundle/MonologExtraBundle/Tests/Units/DependencyInjection/M6WebMonologExtraExtension.php
@@ -3,32 +3,30 @@
 namespace M6Web\Bundle\MonologExtraBundle\Tests\Units\DependencyInjection;
 
 use M6Web\Bundle\MonologExtraBundle\DependencyInjection\M6WebMonologExtraExtension as TestedClass;
-
-use atoum;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
 /**
- * Class M6WebMonologExtraExtension
+ * Class M6WebMonologExtraExtension.
  */
-class M6WebMonologExtraExtension extends atoum
+class M6WebMonologExtraExtension extends \atoum
 {
-    public function testLoad()
+    public function testLoad(): void
     {
         $extension = new TestedClass();
         $container = new ContainerBuilder();
-        $config = array(
-            'processors' => array(
-                'myProcessor' => array(
+        $config = [
+            'processors' => [
+                'myProcessor' => [
                     'type' => 'ContextInformation',
                     'handler' => 'gelf',
-                    'config' => array(
+                    'config' => [
                         'foo' => 'bar',
                         'bar' => 'foo',
                         'env' => "expr(container.getParameter('kernel.environment'))",
-                    ),
-                ),
-            ),
-        );
+                    ],
+                ],
+            ],
+        ];
 
         $extension->load([$config], $container);
 
@@ -38,24 +36,24 @@ public function testLoad()
             ->boolean($definition->isAbstract())
                 ->isEqualTo(false)
             ->array(array_values($definition->getMethodCalls()))
-                ->isEqualTo(array(
-                    array(
+                ->isEqualTo([
+                    [
                         'setConfiguration',
-                        array(
-                            array(
+                        [
+                            [
                                 'foo' => 'bar',
                                 'bar' => 'foo',
                                 'env' => "expr(container.getParameter('kernel.environment'))",
-                            )
-                        )
-                    )
-                ))
+                            ],
+                        ],
+                    ],
+                ])
             ->array($definition->getTags())
-                ->isEqualTo(array(
-                    'monolog.processor' => array(
-                        array('handler' => 'gelf'),
-                    )
-                ))
+                ->isEqualTo([
+                    'monolog.processor' => [
+                        ['handler' => 'gelf'],
+                    ],
+                ])
         ;
     }
 }
diff --git a/src/M6Web/Bundle/MonologExtraBundle/Tests/Units/Processor/ContextInformationProcessor.php b/src/M6Web/Bundle/MonologExtraBundle/Tests/Units/Processor/ContextInformationProcessor.php
index e2761f8..0a220b8 100644
--- a/src/M6Web/Bundle/MonologExtraBundle/Tests/Units/Processor/ContextInformationProcessor.php
+++ b/src/M6Web/Bundle/MonologExtraBundle/Tests/Units/Processor/ContextInformationProcessor.php
@@ -1,18 +1,18 @@
 <?php
+
 namespace M6Web\Bundle\MonologExtraBundle\Tests\Units\Processor;
 
-use atoum;
 use M6Web\Bundle\MonologExtraBundle\Processor\ContextInformationProcessor as Base;
 use Monolog\Level;
 use Monolog\LogRecord;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 
-class ContextInformationProcessor extends atoum
+class ContextInformationProcessor extends \atoum
 {
     public function testInvoke(): void
     {
-        $data = [ 'foo' => uniqid(), 'bar' => uniqid(), 'expr' => 'expr(container.getParameter("test"))' ];
+        $data = ['foo' => uniqid(), 'bar' => uniqid(), 'expr' => 'expr(container.getParameter("test"))'];
 
         $container = new ContainerBuilder();
         $container->setParameter('test', 'yes');
@@ -20,7 +20,7 @@ public function testInvoke(): void
         $processor = new Base($container, new ExpressionLanguage());
         $processor->setConfiguration($data);
 
-        $record = call_user_func($processor, new LogRecord(
+        $record = $processor(new LogRecord(
             datetime: new \DateTimeImmutable(),
             channel: uniqid('channel_', true),
             level: Level::Info,