diff --git a/src/Annotation/Loggable.php b/src/Annotation/Loggable.php
index 1c004f5..f489311 100644
--- a/src/Annotation/Loggable.php
+++ b/src/Annotation/Loggable.php
@@ -7,7 +7,7 @@
  * @Target({"CLASS"})
  */
 #[\Attribute(\Attribute::TARGET_CLASS)]
-class Loggable
+final class Loggable
 {
     public array $groups = [];
 
diff --git a/src/Bridge/Elasticsearch/Context/ElasticsearchContext.php b/src/Bridge/Elasticsearch/Context/ElasticsearchContext.php
index 1486e9d..d07cdfa 100644
--- a/src/Bridge/Elasticsearch/Context/ElasticsearchContext.php
+++ b/src/Bridge/Elasticsearch/Context/ElasticsearchContext.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Bridge\Elasticsearch\Context;
 
-class ElasticsearchContext implements ElasticsearchContextInterface
+final class ElasticsearchContext implements ElasticsearchContextInterface
 {
     public function __construct(private readonly string $className, private readonly string $activityLogIndex, private readonly string $currentDataTrackerIndex)
     {
diff --git a/src/Bridge/Elasticsearch/Context/ElasticsearchContextFactory.php b/src/Bridge/Elasticsearch/Context/ElasticsearchContextFactory.php
index 29937bf..5a3f9f9 100644
--- a/src/Bridge/Elasticsearch/Context/ElasticsearchContextFactory.php
+++ b/src/Bridge/Elasticsearch/Context/ElasticsearchContextFactory.php
@@ -6,7 +6,7 @@
 use Locastic\Loggastic\Model\Output\CurrentDataTracker;
 use Locastic\Loggastic\Util\StringConverter;
 
-class ElasticsearchContextFactory implements ElasticsearchContextFactoryInterface
+final class ElasticsearchContextFactory implements ElasticsearchContextFactoryInterface
 {
     public function create(string $className): ElasticsearchContext
     {
diff --git a/src/Bridge/Elasticsearch/ElasticsearchClient.php b/src/Bridge/Elasticsearch/ElasticsearchClient.php
index 1dc7078..05a9ed8 100644
--- a/src/Bridge/Elasticsearch/ElasticsearchClient.php
+++ b/src/Bridge/Elasticsearch/ElasticsearchClient.php
@@ -5,7 +5,7 @@
 use Elasticsearch\Client;
 use Elasticsearch\ClientBuilder;
 
-class ElasticsearchClient
+final class ElasticsearchClient
 {
     public function __construct(private readonly string $activityLogElasticHost)
     {
diff --git a/src/Bridge/Elasticsearch/ElasticsearchService.php b/src/Bridge/Elasticsearch/ElasticsearchService.php
index 8646a7c..2b35bbb 100644
--- a/src/Bridge/Elasticsearch/ElasticsearchService.php
+++ b/src/Bridge/Elasticsearch/ElasticsearchService.php
@@ -7,7 +7,7 @@
 use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 
-class ElasticsearchService
+final class ElasticsearchService
 {
     use ElasticNormalizationContextTrait;
 
diff --git a/src/Bridge/Elasticsearch/Index/ElasticsearchIndexConfiguration.php b/src/Bridge/Elasticsearch/Index/ElasticsearchIndexConfiguration.php
index cbdbc33..7fc7f62 100644
--- a/src/Bridge/Elasticsearch/Index/ElasticsearchIndexConfiguration.php
+++ b/src/Bridge/Elasticsearch/Index/ElasticsearchIndexConfiguration.php
@@ -4,7 +4,7 @@
 
 use Locastic\Loggastic\Bridge\Elasticsearch\Context\ElasticsearchContextInterface;
 
-class ElasticsearchIndexConfiguration implements ElasticsearchIndexConfigurationInterface
+final class ElasticsearchIndexConfiguration implements ElasticsearchIndexConfigurationInterface
 {
     public function __construct(private readonly bool $dateDetection, private readonly string $dateFormats, private readonly array $activityLogProperties, private readonly array $currentDataTrackerProperties)
     {
diff --git a/src/Bridge/Elasticsearch/Index/ElasticsearchIndexFactory.php b/src/Bridge/Elasticsearch/Index/ElasticsearchIndexFactory.php
index 5dbde13..550bdfe 100644
--- a/src/Bridge/Elasticsearch/Index/ElasticsearchIndexFactory.php
+++ b/src/Bridge/Elasticsearch/Index/ElasticsearchIndexFactory.php
@@ -5,7 +5,7 @@
 use Locastic\Loggastic\Bridge\Elasticsearch\Context\ElasticsearchContextFactoryInterface;
 use Locastic\Loggastic\Bridge\Elasticsearch\ElasticsearchClient;
 
-class ElasticsearchIndexFactory implements ElasticsearchIndexFactoryInterface
+final class ElasticsearchIndexFactory implements ElasticsearchIndexFactoryInterface
 {
     public function __construct(private readonly ElasticsearchClient $elasticsearchClient, private readonly ElasticsearchContextFactoryInterface $elasticsearchContextFactory, private readonly ElasticsearchIndexConfigurationInterface $elasticsearchIndexConfiguration)
     {
diff --git a/src/Command/CreateLoggableIndexesCommand.php b/src/Command/CreateLoggableIndexesCommand.php
index 1da4fad..36c2042 100644
--- a/src/Command/CreateLoggableIndexesCommand.php
+++ b/src/Command/CreateLoggableIndexesCommand.php
@@ -12,7 +12,7 @@
 use Symfony\Component\Console\Style\SymfonyStyle;
 
 #[AsCommand('locastic:activity-logs:create-loggable-indexes')]
-class CreateLoggableIndexesCommand extends Command
+final class CreateLoggableIndexesCommand extends Command
 {
     public function __construct(private readonly LoggableContextCollectionFactoryInterface $loggableContextCollectionFactory, private readonly ElasticsearchIndexFactoryInterface $elasticsearchIndexFactory)
     {
diff --git a/src/Command/PopulateCurrentDataTrackersCommand.php b/src/Command/PopulateCurrentDataTrackersCommand.php
index b419f67..dd6b325 100644
--- a/src/Command/PopulateCurrentDataTrackersCommand.php
+++ b/src/Command/PopulateCurrentDataTrackersCommand.php
@@ -20,7 +20,7 @@
  * Pull all loggable objects from DB and populate currentTracker data to elastic.
  */
 #[AsCommand('locastic:activity-logs:populate-current-data-trackers')]
-class PopulateCurrentDataTrackersCommand extends Command
+final class PopulateCurrentDataTrackersCommand extends Command
 {
     public function __construct(private readonly ElasticsearchIndexFactoryInterface $elasticsearchIndexFactory, private readonly LoggableContextCollectionFactoryInterface $loggableContextCollectionFactory, private readonly ManagerRegistry $managerRegistry, private readonly MessageBusInterface $bus)
     {
diff --git a/src/DataProvider/ActivityLogProvider.php b/src/DataProvider/ActivityLogProvider.php
index eae0166..734d4d6 100644
--- a/src/DataProvider/ActivityLogProvider.php
+++ b/src/DataProvider/ActivityLogProvider.php
@@ -7,7 +7,7 @@
 use Locastic\Loggastic\Model\Output\ActivityLog;
 use Locastic\Loggastic\Model\Output\CurrentDataTracker;
 
-class ActivityLogProvider implements ActivityLogProviderInterface
+final class ActivityLogProvider implements ActivityLogProviderInterface
 {
     public function __construct(private readonly ElasticsearchService $elasticsearchService, private readonly ElasticsearchContextFactoryInterface $elasticsearchContextFactory)
     {
diff --git a/src/DataProvider/CurrentDataTrackerProvider.php b/src/DataProvider/CurrentDataTrackerProvider.php
index 57bda42..df5c5a6 100644
--- a/src/DataProvider/CurrentDataTrackerProvider.php
+++ b/src/DataProvider/CurrentDataTrackerProvider.php
@@ -7,7 +7,7 @@
 use Locastic\Loggastic\Model\Output\CurrentDataTracker;
 use Locastic\Loggastic\Model\Output\CurrentDataTrackerInterface;
 
-class CurrentDataTrackerProvider implements CurrentDataTrackerProviderInterface
+final class CurrentDataTrackerProvider implements CurrentDataTrackerProviderInterface
 {
     public function __construct(private readonly ElasticsearchService $elasticsearchService, private readonly ElasticsearchContextFactoryInterface $elasticsearchContextFactory)
     {
diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index a05b533..e210ab3 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -5,7 +5,7 @@
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 
-class Configuration implements ConfigurationInterface
+final class Configuration implements ConfigurationInterface
 {
     public function getConfigTreeBuilder(): TreeBuilder
     {
diff --git a/src/DependencyInjection/LocasticLoggasticExtension.php b/src/DependencyInjection/LocasticLoggasticExtension.php
index b5f4f0f..ef6cdbf 100644
--- a/src/DependencyInjection/LocasticLoggasticExtension.php
+++ b/src/DependencyInjection/LocasticLoggasticExtension.php
@@ -12,7 +12,7 @@
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 use Symfony\Component\Finder\Finder;
 
-class LocasticLoggasticExtension extends Extension
+final class LocasticLoggasticExtension extends Extension
 {
     /**
      * {@inheritdoc}
diff --git a/src/Enum/ActivityLogAction.php b/src/Enum/ActivityLogAction.php
index 979aac0..752741a 100644
--- a/src/Enum/ActivityLogAction.php
+++ b/src/Enum/ActivityLogAction.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Enum;
 
-class ActivityLogAction
+final class ActivityLogAction
 {
     final public const CREATED = 'Created';
     final public const EDITED = 'Edited';
diff --git a/src/Event/PreDispatchActivityLogMessageEvent.php b/src/Event/PreDispatchActivityLogMessageEvent.php
index ae0f7a8..ff7fd24 100644
--- a/src/Event/PreDispatchActivityLogMessageEvent.php
+++ b/src/Event/PreDispatchActivityLogMessageEvent.php
@@ -6,7 +6,7 @@
 use Locastic\Loggastic\Model\ActivityLogInterface;
 use Symfony\Contracts\EventDispatcher\Event;
 
-class PreDispatchActivityLogMessageEvent extends Event
+final class PreDispatchActivityLogMessageEvent extends Event
 {
     public function __construct(private readonly ActivityLogMessageInterface $activityLogMessage)
     {
diff --git a/src/EventSubscriber/ActivityLogDoctrineSubscriber.php b/src/EventSubscriber/ActivityLogDoctrineSubscriber.php
index 79ca289..8423e1c 100644
--- a/src/EventSubscriber/ActivityLogDoctrineSubscriber.php
+++ b/src/EventSubscriber/ActivityLogDoctrineSubscriber.php
@@ -12,7 +12,7 @@
 use Locastic\Loggastic\Logger\ActivityLogger;
 use Locastic\Loggastic\Util\ClassUtils;
 
-class ActivityLogDoctrineSubscriber implements EventSubscriberInterface
+final class ActivityLogDoctrineSubscriber implements EventSubscriberInterface
 {
     private array $persistedEntities = [];
 
diff --git a/src/Exception/IndexNotFoundException.php b/src/Exception/IndexNotFoundException.php
index 50a0402..4532852 100644
--- a/src/Exception/IndexNotFoundException.php
+++ b/src/Exception/IndexNotFoundException.php
@@ -2,6 +2,6 @@
 
 namespace Locastic\Loggastic\Exception;
 
-class IndexNotFoundException extends \Exception
+final class IndexNotFoundException extends \Exception
 {
 }
diff --git a/src/Factory/CurrentDataTrackerInputFactory.php b/src/Factory/CurrentDataTrackerInputFactory.php
index 31cfc82..af368e9 100644
--- a/src/Factory/CurrentDataTrackerInputFactory.php
+++ b/src/Factory/CurrentDataTrackerInputFactory.php
@@ -6,7 +6,7 @@
 use Locastic\Loggastic\Model\Output\CurrentDataTrackerInterface;
 use Locastic\Loggastic\Util\ClassUtils;
 
-class CurrentDataTrackerInputFactory implements CurrentDataTrackerInputFactoryInterface
+final class CurrentDataTrackerInputFactory implements CurrentDataTrackerInputFactoryInterface
 {
     public function create($item, ?array $normalizedData = []): CurrentDataTrackerInput
     {
diff --git a/src/LocasticLoggasticBundle.php b/src/LocasticLoggasticBundle.php
index 8fe869a..6d8a718 100644
--- a/src/LocasticLoggasticBundle.php
+++ b/src/LocasticLoggasticBundle.php
@@ -6,7 +6,7 @@
 use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 
-class LocasticLoggasticBundle extends Bundle
+final class LocasticLoggasticBundle extends Bundle
 {
     public function getContainerExtension(): Extension
     {
diff --git a/src/Logger/ActivityLogger.php b/src/Logger/ActivityLogger.php
index 6ccb455..650e74a 100644
--- a/src/Logger/ActivityLogger.php
+++ b/src/Logger/ActivityLogger.php
@@ -14,7 +14,7 @@
 use Symfony\Component\Messenger\MessageBusInterface;
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 
-class ActivityLogger implements ActivityLoggerInterface
+final class ActivityLogger implements ActivityLoggerInterface
 {
     use ElasticNormalizationContextTrait;
 
diff --git a/src/Message/CreateActivityLogMessage.php b/src/Message/CreateActivityLogMessage.php
index 5aa8c17..71e0c09 100644
--- a/src/Message/CreateActivityLogMessage.php
+++ b/src/Message/CreateActivityLogMessage.php
@@ -5,7 +5,7 @@
 use Locastic\Loggastic\Enum\ActivityLogAction;
 use Locastic\Loggastic\Util\ClassUtils;
 
-class CreateActivityLogMessage implements CreateActivityLogMessageInterface
+final class CreateActivityLogMessage implements CreateActivityLogMessageInterface
 {
     private readonly string $actionName;
     private readonly \DateTime $dateTime;
diff --git a/src/Message/DeleteActivityLogMessage.php b/src/Message/DeleteActivityLogMessage.php
index a41de40..fd8fd4b 100644
--- a/src/Message/DeleteActivityLogMessage.php
+++ b/src/Message/DeleteActivityLogMessage.php
@@ -4,7 +4,7 @@
 
 use Locastic\Loggastic\Enum\ActivityLogAction;
 
-class DeleteActivityLogMessage implements DeleteActivityLogMessageInterface
+final class DeleteActivityLogMessage implements DeleteActivityLogMessageInterface
 {
     private readonly \DateTime $dateTime;
     private readonly string $actionName;
diff --git a/src/Message/PopulateCurrentDataTrackersMessage.php b/src/Message/PopulateCurrentDataTrackersMessage.php
index bca4d4c..f27041f 100644
--- a/src/Message/PopulateCurrentDataTrackersMessage.php
+++ b/src/Message/PopulateCurrentDataTrackersMessage.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Message;
 
-class PopulateCurrentDataTrackersMessage
+final class PopulateCurrentDataTrackersMessage
 {
     public function __construct(private readonly int $offset, private readonly int $batchSize, private readonly string $loggableClass, private readonly array $loggableContext)
     {
diff --git a/src/Message/UpdateActivityLogMessage.php b/src/Message/UpdateActivityLogMessage.php
index 0ef33be..79cf34a 100644
--- a/src/Message/UpdateActivityLogMessage.php
+++ b/src/Message/UpdateActivityLogMessage.php
@@ -5,7 +5,7 @@
 use Locastic\Loggastic\Enum\ActivityLogAction;
 use Locastic\Loggastic\Util\ClassUtils;
 
-class UpdateActivityLogMessage implements UpdateActivityLogMessageInterface
+final class UpdateActivityLogMessage implements UpdateActivityLogMessageInterface
 {
     private \DateTime $dateTime;
     private readonly string $actionName;
diff --git a/src/MessageHandler/CreateActivityLogHandler.php b/src/MessageHandler/CreateActivityLogHandler.php
index 09d7cf3..ea1bae5 100644
--- a/src/MessageHandler/CreateActivityLogHandler.php
+++ b/src/MessageHandler/CreateActivityLogHandler.php
@@ -11,7 +11,7 @@
 use Symfony\Component\Messenger\MessageBusInterface;
 
 #[AsMessageHandler]
-class CreateActivityLogHandler
+final class CreateActivityLogHandler
 {
     public function __construct(
         private readonly ActivityLogProcessorInterface $activityLogProcessor,
diff --git a/src/MessageHandler/DeleteActivityLogHandler.php b/src/MessageHandler/DeleteActivityLogHandler.php
index 88148aa..c3f11d0 100644
--- a/src/MessageHandler/DeleteActivityLogHandler.php
+++ b/src/MessageHandler/DeleteActivityLogHandler.php
@@ -6,7 +6,7 @@
 use Locastic\Loggastic\Message\DeleteActivityLogMessageInterface;
 use Locastic\Loggastic\Metadata\LoggableContext\Factory\LoggableContextFactoryInterface;
 
-class DeleteActivityLogHandler
+final class DeleteActivityLogHandler
 {
     public function __construct(
         private readonly ActivityLogProcessorInterface $activityLogProcessor,
diff --git a/src/MessageHandler/PopulateCurrentDataTrackersHandler.php b/src/MessageHandler/PopulateCurrentDataTrackersHandler.php
index acf69e4..57e4233 100644
--- a/src/MessageHandler/PopulateCurrentDataTrackersHandler.php
+++ b/src/MessageHandler/PopulateCurrentDataTrackersHandler.php
@@ -12,7 +12,7 @@
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 
 #[AsMessageHandler]
-class PopulateCurrentDataTrackersHandler
+final class PopulateCurrentDataTrackersHandler
 {
     use ElasticNormalizationContextTrait;
 
diff --git a/src/MessageHandler/UpdateActivityLogHandler.php b/src/MessageHandler/UpdateActivityLogHandler.php
index 12eeed8..73557f4 100644
--- a/src/MessageHandler/UpdateActivityLogHandler.php
+++ b/src/MessageHandler/UpdateActivityLogHandler.php
@@ -11,7 +11,7 @@
 use Symfony\Component\Messenger\Attribute\AsMessageHandler;
 
 #[AsMessageHandler]
-class UpdateActivityLogHandler
+final class UpdateActivityLogHandler
 {
     use ElasticNormalizationContextTrait;
 
diff --git a/src/Metadata/Extractor/XmlLoggableExtractor.php b/src/Metadata/Extractor/XmlLoggableExtractor.php
index a948fe9..59bd699 100644
--- a/src/Metadata/Extractor/XmlLoggableExtractor.php
+++ b/src/Metadata/Extractor/XmlLoggableExtractor.php
@@ -5,7 +5,7 @@
 use Symfony\Component\Config\Util\XmlUtils;
 use Symfony\Component\Security\Core\Exception\InvalidArgumentException;
 
-class XmlLoggableExtractor extends AbstractLoggableExtractor
+final class XmlLoggableExtractor extends AbstractLoggableExtractor
 {
     final public const RESOURCE_SCHEMA = __DIR__.'/schema/metadata.xsd';
 
diff --git a/src/Metadata/Extractor/YamlLoggableExtractor.php b/src/Metadata/Extractor/YamlLoggableExtractor.php
index e611ac1..3341745 100644
--- a/src/Metadata/Extractor/YamlLoggableExtractor.php
+++ b/src/Metadata/Extractor/YamlLoggableExtractor.php
@@ -5,7 +5,7 @@
 use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Yaml;
 
-class YamlLoggableExtractor extends AbstractLoggableExtractor
+final class YamlLoggableExtractor extends AbstractLoggableExtractor
 {
     protected function extractPath(string $path): void
     {
diff --git a/src/Metadata/LoggableContext/Factory/AnnotationLoggableContextCollectionFactory.php b/src/Metadata/LoggableContext/Factory/AnnotationLoggableContextCollectionFactory.php
index ca09735..f3bc7a6 100644
--- a/src/Metadata/LoggableContext/Factory/AnnotationLoggableContextCollectionFactory.php
+++ b/src/Metadata/LoggableContext/Factory/AnnotationLoggableContextCollectionFactory.php
@@ -7,7 +7,7 @@
 use Locastic\Loggastic\Metadata\LoggableContext\LoggableContextCollection;
 use Locastic\Loggastic\Util\RecursiveClassIterator;
 
-class AnnotationLoggableContextCollectionFactory implements LoggableContextCollectionFactoryInterface
+final class AnnotationLoggableContextCollectionFactory implements LoggableContextCollectionFactoryInterface
 {
     /**
      * @param string[] $loggablePaths
diff --git a/src/Metadata/LoggableContext/Factory/CachedLoggableContextCollectionFactory.php b/src/Metadata/LoggableContext/Factory/CachedLoggableContextCollectionFactory.php
index f4c307f..621f1e9 100644
--- a/src/Metadata/LoggableContext/Factory/CachedLoggableContextCollectionFactory.php
+++ b/src/Metadata/LoggableContext/Factory/CachedLoggableContextCollectionFactory.php
@@ -5,7 +5,7 @@
 use Locastic\Loggastic\Metadata\LoggableContext\LoggableContextCollection;
 use Symfony\Contracts\Cache\CacheInterface;
 
-class CachedLoggableContextCollectionFactory implements LoggableContextCollectionFactoryInterface
+final class CachedLoggableContextCollectionFactory implements LoggableContextCollectionFactoryInterface
 {
     final public const CACHE_KEY = 'loggable_name_collection';
 
diff --git a/src/Metadata/LoggableContext/Factory/LoggableContextFactory.php b/src/Metadata/LoggableContext/Factory/LoggableContextFactory.php
index fcea831..e35a10c 100644
--- a/src/Metadata/LoggableContext/Factory/LoggableContextFactory.php
+++ b/src/Metadata/LoggableContext/Factory/LoggableContextFactory.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Metadata\LoggableContext\Factory;
 
-class LoggableContextFactory implements LoggableContextFactoryInterface
+final class LoggableContextFactory implements LoggableContextFactoryInterface
 {
     public function __construct(private readonly LoggableContextCollectionFactoryInterface $loggableContextCollectionFactory)
     {
diff --git a/src/Metadata/LoggableContext/LoggableContextCollection.php b/src/Metadata/LoggableContext/LoggableContextCollection.php
index 2852ec6..6416870 100644
--- a/src/Metadata/LoggableContext/LoggableContextCollection.php
+++ b/src/Metadata/LoggableContext/LoggableContextCollection.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Metadata\LoggableContext;
 
-class LoggableContextCollection implements \IteratorAggregate, \Countable
+final class LoggableContextCollection implements \IteratorAggregate, \Countable
 {
     public function __construct(private readonly array $loggableContextCollection = [])
     {
diff --git a/src/Util/ArrayDiff.php b/src/Util/ArrayDiff.php
index ab55336..a9ff129 100644
--- a/src/Util/ArrayDiff.php
+++ b/src/Util/ArrayDiff.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Util;
 
-class ArrayDiff
+final class ArrayDiff
 {
     public static function arrayDiffRecursive($array1, $array2): array
     {
diff --git a/src/Util/ArraysComparer.php b/src/Util/ArraysComparer.php
index 1abe231..6ee1f54 100644
--- a/src/Util/ArraysComparer.php
+++ b/src/Util/ArraysComparer.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Util;
 
-class ArraysComparer
+final class ArraysComparer
 {
     public static function getCompared(array $currentData, array $previousData): ?array
     {
diff --git a/src/Util/ClassUtils.php b/src/Util/ClassUtils.php
index 5358ee2..5187778 100644
--- a/src/Util/ClassUtils.php
+++ b/src/Util/ClassUtils.php
@@ -4,7 +4,7 @@
 
 use Doctrine\Persistence\Proxy;
 
-class ClassUtils
+final class ClassUtils
 {
     public static function getClass($object): string
     {
diff --git a/src/Util/RecursiveClassIterator.php b/src/Util/RecursiveClassIterator.php
index 1bf9c1e..7d0d28a 100644
--- a/src/Util/RecursiveClassIterator.php
+++ b/src/Util/RecursiveClassIterator.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Util;
 
-class RecursiveClassIterator
+final class RecursiveClassIterator
 {
     public static function getReflectionClasses(array $paths): \Generator
     {
diff --git a/src/Util/StringConverter.php b/src/Util/StringConverter.php
index cc86b7d..1452e1a 100644
--- a/src/Util/StringConverter.php
+++ b/src/Util/StringConverter.php
@@ -2,7 +2,7 @@
 
 namespace Locastic\Loggastic\Util;
 
-class StringConverter
+final class StringConverter
 {
     /**
      * Converts a word into the format for the elastic document name. Converts 'ModelName' to 'model_name'.