diff --git a/composer.json b/composer.json
index e09bd51..b9d955f 100644
--- a/composer.json
+++ b/composer.json
@@ -22,12 +22,12 @@
         "php": "^7.4 || ^8.0",
         "ext-mongodb": "^1.6",
         "mongodb/mongodb": "^1.5",
-        "symfony/framework-bundle": "^4.4 || ^5.0 || ^6.0"
+        "symfony/framework-bundle": "^4.4 || ^5.0 || ^6.0 || ^7.0"
     },
     "require-dev": {
         "matthiasnoback/symfony-dependency-injection-test": "^4",
-        "symfony/web-profiler-bundle": "^4.4 || ^5.0 || ^6.0",
-        "symfony/console": "^4.4 || ^5.0 || ^6.0",
+        "symfony/web-profiler-bundle": "^4.4 || ^5.0 || ^6.0 || ^7.0",
+        "symfony/console": "^4.4 || ^5.0 || ^6.0 || ^7.0",
         "phpunit/phpunit": "^9.6.13",
         "symfony/phpunit-bridge": "^7.0",
         "facile-it/facile-coding-standard": "1.2.0",
diff --git a/src/Capsule/Collection.php b/src/Capsule/Collection.php
index c1e0529..3a1a7eb 100644
--- a/src/Capsule/Collection.php
+++ b/src/Capsule/Collection.php
@@ -10,7 +10,6 @@
 use MongoDB\Driver\Manager;
 use MongoDB\Driver\ReadPreference;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\HttpKernel\Kernel;
 
 /**
  * @internal
@@ -230,12 +229,7 @@ private function notifyQueryExecution(Query $queryLog)
     {
         $queryLog->setExecutionTime(microtime(true) - $queryLog->getStart());
 
-        $event = new QueryEvent($queryLog);
-        if (Kernel::VERSION_ID >= 40_300) {
-            $this->eventDispatcher->dispatch($event, QueryEvent::QUERY_EXECUTED);
-        } else {
-            $this->eventDispatcher->dispatch($event, QueryEvent::QUERY_EXECUTED);
-        }
+        $this->eventDispatcher->dispatch(new QueryEvent($queryLog), QueryEvent::QUERY_EXECUTED);
     }
 
     public function getClientName(): string
diff --git a/src/Command/AbstractCommand.php b/src/Command/AbstractCommand.php
index 9a6fba7..7a60a83 100644
--- a/src/Command/AbstractCommand.php
+++ b/src/Command/AbstractCommand.php
@@ -43,7 +43,7 @@ protected function getContainer(): ContainerInterface
     /**
      * @inheritDoc
      */
-    protected function configure()
+    protected function configure(): void
     {
         parent::configure();
         $this
@@ -53,7 +53,7 @@ protected function configure()
     /**
      * @inheritDoc
      */
-    protected function initialize(InputInterface $input, OutputInterface $output)
+    protected function initialize(InputInterface $input, OutputInterface $output): void
     {
         parent::initialize($input, $output);
         $this->io = new SymfonyStyle($input, $output);
diff --git a/src/Command/DropCollectionCommand.php b/src/Command/DropCollectionCommand.php
index 5f815f0..5ff3c2c 100644
--- a/src/Command/DropCollectionCommand.php
+++ b/src/Command/DropCollectionCommand.php
@@ -13,7 +13,7 @@ class DropCollectionCommand extends AbstractCommand
     /**
      * @inheritDoc
      */
-    protected function configure()
+    protected function configure(): void
     {
         parent::configure();
         $this
diff --git a/src/Command/DropDatabaseCommand.php b/src/Command/DropDatabaseCommand.php
index 17b78ea..718a3c1 100644
--- a/src/Command/DropDatabaseCommand.php
+++ b/src/Command/DropDatabaseCommand.php
@@ -12,7 +12,7 @@ class DropDatabaseCommand extends AbstractCommand
     /**
      * @inheritDoc
      */
-    protected function configure()
+    protected function configure(): void
     {
         parent::configure();
         $this
diff --git a/src/Command/LoadFixturesCommand.php b/src/Command/LoadFixturesCommand.php
index b274187..4b0f75d 100644
--- a/src/Command/LoadFixturesCommand.php
+++ b/src/Command/LoadFixturesCommand.php
@@ -24,7 +24,7 @@ class LoadFixturesCommand extends AbstractCommand
     /**
      * @inheritDoc
      */
-    protected function configure()
+    protected function configure(): void
     {
         parent::configure();
         $this
@@ -33,7 +33,7 @@ protected function configure()
             ->setDescription('Load fixtures and applies them');
     }
 
-    protected function initialize(InputInterface $input, OutputInterface $output)
+    protected function initialize(InputInterface $input, OutputInterface $output): void
     {
         parent::initialize($input, $output);
         $this->loader = new MongoFixturesLoader($this->getContainer());
@@ -68,7 +68,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         return 0;
     }
 
-    private function loadFixture(MongoFixtureInterface $indexList)
+    private function loadFixture(MongoFixtureInterface $indexList): void
     {
         $indexList->loadData();
         $indexList->loadIndexes();
@@ -90,7 +90,7 @@ private function prepareSearchPaths(InputInterface $input, KernelInterface $kern
         return $paths;
     }
 
-    private function loadPaths(array $paths)
+    private function loadPaths(array $paths): void
     {
         foreach ($paths as $path) {
             if (is_dir($path)) {
diff --git a/src/DataCollector/MongoDbDataCollector.php b/src/DataCollector/MongoDbDataCollector.php
index d5efdb1..5d305e6 100644
--- a/src/DataCollector/MongoDbDataCollector.php
+++ b/src/DataCollector/MongoDbDataCollector.php
@@ -26,15 +26,12 @@ class MongoDbDataCollector extends DataCollector
     /** @var DataCollectorLoggerInterface */
     private $logger;
 
-    /** @var array */
-    protected $data;
-
     public function __construct()
     {
         $this->reset();
     }
 
-    public function reset()
+    public function reset(): void
     {
         $this->data = [
             self::QUERY_KEYWORD => [],
@@ -43,12 +40,12 @@ public function reset()
         ];
     }
 
-    public function setLogger(DataCollectorLoggerInterface $logger)
+    public function setLogger(DataCollectorLoggerInterface $logger): void
     {
         $this->logger = $logger;
     }
 
-    public function collect(Request $request, Response $response, $exception = null)
+    public function collect(Request $request, Response $response, $exception = null): void
     {
         if ($exception && ! $exception instanceof \Throwable) {
             throw new \InvalidArgumentException('Expecting \Throwable, got ' . get_debug_type($exception));
@@ -101,7 +98,7 @@ public function getConnections(): array
     /**
      * @inheritDoc
      */
-    public function getName()
+    public function getName(): string
     {
         return 'mongodb';
     }
diff --git a/src/DependencyInjection/MongoDbBundleExtension.php b/src/DependencyInjection/MongoDbBundleExtension.php
index dd53814..31beb44 100644
--- a/src/DependencyInjection/MongoDbBundleExtension.php
+++ b/src/DependencyInjection/MongoDbBundleExtension.php
@@ -26,7 +26,7 @@ final class MongoDbBundleExtension extends Extension
     /** @var ContainerBuilder */
     private $containerBuilder;
 
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $this->containerBuilder = $container;
         $config = $this->processConfiguration(new Configuration(), $configs);
@@ -42,8 +42,6 @@ public function load(array $configs, ContainerBuilder $container)
             $loader->load('profiler.xml');
             $this->attachDataCollectionListenerToEventManager();
         }
-
-        return $config;
     }
 
     private function mustCollectData(array $config): bool
diff --git a/tests/Functional/Capsule/CollectionTest.php b/tests/Functional/Capsule/CollectionTest.php
index a77959a..eb0bb23 100644
--- a/tests/Functional/Capsule/CollectionTest.php
+++ b/tests/Functional/Capsule/CollectionTest.php
@@ -10,7 +10,6 @@
 use MongoDB\Driver\Manager;
 use Prophecy\Argument;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\HttpKernel\Kernel;
 
 class CollectionTest extends AppTestCase
 {
@@ -190,12 +189,7 @@ public function test_distinct()
 
     protected function assertEventsDispatching($ev)
     {
-        if (Kernel::VERSION_ID >= 40_300) {
-            $ev->dispatch(Argument::type(QueryEvent::class), QueryEvent::QUERY_PREPARED)->shouldBeCalled();
-            $ev->dispatch(Argument::type(QueryEvent::class), QueryEvent::QUERY_EXECUTED)->shouldBeCalled();
-        } else {
-            $ev->dispatch(QueryEvent::QUERY_PREPARED, Argument::type(QueryEvent::class))->shouldBeCalled();
-            $ev->dispatch(QueryEvent::QUERY_EXECUTED, Argument::type(QueryEvent::class))->shouldBeCalled();
-        }
+        $ev->dispatch(Argument::type(QueryEvent::class), QueryEvent::QUERY_PREPARED)->shouldBeCalled();
+        $ev->dispatch(Argument::type(QueryEvent::class), QueryEvent::QUERY_EXECUTED)->shouldBeCalled();
     }
 }
diff --git a/tests/Functional/Command/AbstractCommandTest.php b/tests/Functional/Command/AbstractCommandTest.php
index 5247b77..241b5bc 100644
--- a/tests/Functional/Command/AbstractCommandTest.php
+++ b/tests/Functional/Command/AbstractCommandTest.php
@@ -62,7 +62,7 @@ private function addCommandToApplication()
 
 class FakeCommand extends AbstractCommand
 {
-    protected function configure()
+    protected function configure(): void
     {
         parent::configure();
         $this
diff --git a/tests/Unit/Services/ClientRegistryTest.php b/tests/Unit/Services/ClientRegistryTest.php
index 9be8e70..1dfe2f4 100644
--- a/tests/Unit/Services/ClientRegistryTest.php
+++ b/tests/Unit/Services/ClientRegistryTest.php
@@ -9,7 +9,6 @@
 use PHPUnit\Framework\TestCase;
 use Prophecy\Argument;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\HttpKernel\Kernel;
 
 class ClientRegistryTest extends TestCase
 {
@@ -107,15 +106,9 @@ private function createEventDispatcherMock(): EventDispatcherInterface
             return true;
         });
 
-        if (Kernel::VERSION_ID >= 40_300) {
-            $eventDispatcher->dispatch($event, ConnectionEvent::CLIENT_CREATED)
-                ->shouldBeCalledOnce()
-                ->willReturnArgument(0);
-        } else {
-            $eventDispatcher->dispatch(ConnectionEvent::CLIENT_CREATED, $event)
-                ->shouldBeCalledOnce()
-                ->willReturnArgument(1);
-        }
+        $eventDispatcher->dispatch($event, ConnectionEvent::CLIENT_CREATED)
+            ->shouldBeCalledOnce()
+            ->willReturnArgument(0);
 
         return $eventDispatcher->reveal();
     }