diff --git a/src/Handler/Lol.php b/src/Handler/Lol.php
index 3a87921..a9dc7ae 100644
--- a/src/Handler/Lol.php
+++ b/src/Handler/Lol.php
@@ -7,10 +7,10 @@ use Lubian\AttributeMagic\Infrastructure\Route\AsHandler;
 use Lubian\AttributeMagic\Infrastructure\Route\HttpMethod;
 use Lubian\AttributeMagic\Listener\LauschEvent;
 
-final class Lol
+final readonly class Lol
 {
     public function __construct(
-        private readonly Dispatcher $dispatcher,
+        private Dispatcher $dispatcher,
     ) {
     }
 
diff --git a/src/Infrastructure/Event/AsListener.php b/src/Infrastructure/Event/AsListener.php
index 4143478..ea300ea 100644
--- a/src/Infrastructure/Event/AsListener.php
+++ b/src/Infrastructure/Event/AsListener.php
@@ -4,16 +4,15 @@ namespace Lubian\AttributeMagic\Infrastructure\Event;
 
 use Attribute;
 
-#[Attribute(Attribute::TARGET_METHOD)]
-final class AsListener
+#[Attribute(Attribute::TARGET_METHOD)]final readonly class AsListener
 {
     /**
      * @param class-string $eventClass
      * @param int<-100, 100> $priority
      */
     public function __construct(
-        public readonly string $eventClass,
-        public readonly int $priority = 0,
+        public string $eventClass,
+        public int $priority = 0,
     ) {
     }
 }
diff --git a/src/Infrastructure/Event/DispatcherFactory.php b/src/Infrastructure/Event/DispatcherFactory.php
index 195a47c..3dcac19 100644
--- a/src/Infrastructure/Event/DispatcherFactory.php
+++ b/src/Infrastructure/Event/DispatcherFactory.php
@@ -11,13 +11,13 @@ use function file_put_contents;
 use function serialize;
 use function unserialize;
 
-final class DispatcherFactory
+final readonly class DispatcherFactory
 {
     public const CACHE_FILE = __DIR__ . '/../../../var/listenerCache';
 
     public function __construct(
-        private readonly Finder $finder,
-        private readonly InvokerInterface $invoker
+        private Finder $finder,
+        private InvokerInterface $invoker
     ) {
     }
 
diff --git a/src/Infrastructure/Event/Listener.php b/src/Infrastructure/Event/Listener.php
index 24c2e3e..077fd62 100644
--- a/src/Infrastructure/Event/Listener.php
+++ b/src/Infrastructure/Event/Listener.php
@@ -2,7 +2,7 @@
 
 namespace Lubian\AttributeMagic\Infrastructure\Event;
 
-final class Listener
+final readonly class Listener
 {
     /**
      * @param class-string $eventClass
@@ -11,10 +11,10 @@ final class Listener
      * @param non-empty-string $listenerMethod
      */
     public function __construct(
-        public readonly string $eventClass,
-        public readonly int $priority,
-        public readonly string $listenerClass,
-        public readonly string $listenerMethod,
+        public string $eventClass,
+        public int $priority,
+        public string $listenerClass,
+        public string $listenerMethod,
     ) {
     }
 }
diff --git a/src/Infrastructure/Route/AsHandler.php b/src/Infrastructure/Route/AsHandler.php
index 7a417ca..66fe3d3 100644
--- a/src/Infrastructure/Route/AsHandler.php
+++ b/src/Infrastructure/Route/AsHandler.php
@@ -4,15 +4,14 @@ namespace Lubian\AttributeMagic\Infrastructure\Route;
 
 use Attribute;
 
-#[Attribute(Attribute::TARGET_METHOD)]
-final class AsHandler
+#[Attribute(Attribute::TARGET_METHOD)]final readonly class AsHandler
 {
     /**
      * @param non-empty-string $path
      */
     public function __construct(
-        public readonly HttpMethod $method,
-        public readonly string $path,
+        public HttpMethod $method,
+        public string $path,
     ) {
     }
 }
diff --git a/src/Infrastructure/Route/Handler.php b/src/Infrastructure/Route/Handler.php
index 58a6d11..c14604a 100644
--- a/src/Infrastructure/Route/Handler.php
+++ b/src/Infrastructure/Route/Handler.php
@@ -2,17 +2,17 @@
 
 namespace Lubian\AttributeMagic\Infrastructure\Route;
 
-final class Handler
+final readonly class Handler
 {
     /**
      * @param non-empty-string $handlerClass
      * @param non-empty-string $handlerMethod
      */
     public function __construct(
-        public readonly HttpMethod $method,
-        public readonly string $path,
-        public readonly string $handlerClass,
-        public readonly string $handlerMethod,
+        public HttpMethod $method,
+        public string $path,
+        public string $handlerClass,
+        public string $handlerMethod,
     ) {
     }
 }
diff --git a/src/Infrastructure/WebApp/Route/AttributeRouteCollector.php b/src/Infrastructure/WebApp/Route/AttributeRouteCollector.php
index 129b09f..fd6d6f2 100644
--- a/src/Infrastructure/WebApp/Route/AttributeRouteCollector.php
+++ b/src/Infrastructure/WebApp/Route/AttributeRouteCollector.php
@@ -5,10 +5,10 @@ namespace Lubian\AttributeMagic\Infrastructure\WebApp\Route;
 use Lubian\AttributeMagic\Infrastructure\Event\AsListener;
 use Lubian\AttributeMagic\Infrastructure\Finder;
 
-final class AttributeRouteCollector
+final readonly class AttributeRouteCollector
 {
     public function __construct(
-        private readonly Finder $finder
+        private Finder $finder
     ) {
     }
 
diff --git a/src/Infrastructure/WebApp/Route/HandlerCaller.php b/src/Infrastructure/WebApp/Route/HandlerCaller.php
index 4c98437..11abbf5 100644
--- a/src/Infrastructure/WebApp/Route/HandlerCaller.php
+++ b/src/Infrastructure/WebApp/Route/HandlerCaller.php
@@ -10,10 +10,10 @@ use Symfony\Component\HttpFoundation\Response;
 use function ob_get_clean;
 use function ob_start;
 
-final class HandlerCaller
+final readonly class HandlerCaller
 {
     public function __construct(
-        private readonly InvokerInterface $invoker
+        private InvokerInterface $invoker
     ) {
     }
 
diff --git a/src/Infrastructure/WebApp/Route/HandlerResolver.php b/src/Infrastructure/WebApp/Route/HandlerResolver.php
index d42c64a..7df5c40 100644
--- a/src/Infrastructure/WebApp/Route/HandlerResolver.php
+++ b/src/Infrastructure/WebApp/Route/HandlerResolver.php
@@ -12,11 +12,11 @@ use Symfony\Component\HttpFoundation\Response;
 
 use function FastRoute\cachedDispatcher;
 
-final class HandlerResolver
+final readonly class HandlerResolver
 {
     public function __construct(
-        private readonly Dispatcher $dispatcher,
-        private readonly bool $cached = false,
+        private Dispatcher $dispatcher,
+        private bool $cached = false,
     ) {
     }