diff --git a/README.md b/README.md
index 0611d2a..019b933 100644
--- a/README.md
+++ b/README.md
@@ -15,8 +15,8 @@ The queue system uses logs to ensure maintainability and implements retry featur
 
 ## Version History
 
-| Branch | Release | PSR-11 | OSS Lifecycle                                                                                                                          | PHP Version                                                                                           |
-|--------|---------|--------|----------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|
+| Branch | Release | PSR-11 | OSS Lifecycle                                                         | PHP Version                                                                                           |
+|--------|---------|--------|-----------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|
 | 2.0    | `> 2.0` | 1      | ![OSS Lifecycle](https://img.shields.io/osslifecycle/dotkernel/queue) | ![PHP from Packagist (specify version)](https://img.shields.io/packagist/php-v/dotkernel/queue/2.0.0) |
 | 1.0    | `< 2.0` | 1      | ![OSS Lifecycle](https://img.shields.io/osslifecycle/dotkernel/queue) | ![PHP from Packagist (specify version)](https://img.shields.io/packagist/php-v/dotkernel/queue/1.0.0) |
 
diff --git a/composer.json b/composer.json
index 479b3bc..7bde9e8 100644
--- a/composer.json
+++ b/composer.json
@@ -62,6 +62,9 @@
         "roave/security-advisories": "dev-master",
         "swoole/ide-helper": "~6.0.0"
     },
+    "conflict": {
+        "symfony/polyfill-php83": "<1.30"
+    },
     "autoload": {
         "psr-4": {
             "Queue\\": "src/"
diff --git a/src/App/Message/Message.php b/src/App/Message/Message.php
index 2ac080b..68c5874 100644
--- a/src/App/Message/Message.php
+++ b/src/App/Message/Message.php
@@ -7,17 +7,7 @@
 class Message
 {
     public function __construct(
-        private array $payload,
+        public array $payload,
     ) {
     }
-
-    public function getPayload(): array
-    {
-        return $this->payload;
-    }
-
-    public function setPayload(array $payload): void
-    {
-        $this->payload = $payload;
-    }
 }
diff --git a/src/App/Message/MessageHandler.php b/src/App/Message/MessageHandler.php
index 39a0d2b..0a505cb 100644
--- a/src/App/Message/MessageHandler.php
+++ b/src/App/Message/MessageHandler.php
@@ -28,7 +28,7 @@ public function __construct(
      */
     public function __invoke(Message $message): void
     {
-        $payload = $message->getPayload();
+        $payload = $message->payload;
 
         try {
             if ($payload['foo'] === 'control') {
@@ -52,7 +52,7 @@ public function __invoke(Message $message): void
             }
 
             $payload['retry_count'] = $retryCount + 1;
-            $message->setPayload($payload);
+            $message->payload       = $payload;
 
             throw $e;
         }
diff --git a/src/Swoole/Command/StartCommand.php b/src/Swoole/Command/StartCommand.php
index c1eb1cd..8651703 100644
--- a/src/Swoole/Command/StartCommand.php
+++ b/src/Swoole/Command/StartCommand.php
@@ -24,9 +24,9 @@ class StartCommand extends Command
 
     public PidManager $pidManager;
 
-    public const DEFAULT_PROCESS_NAME = 'dotkernel-queue';
+    public const string DEFAULT_PROCESS_NAME = 'dotkernel-queue';
 
-    public const HELP = <<<'EOH'
+    public const string HELP = <<<'EOH'
 Start the web server. If --daemonize is provided, starts the server as a
 background process and returns handling to the shell; otherwise, the
 server runs in the current process.
diff --git a/src/Swoole/Command/StopCommand.php b/src/Swoole/Command/StopCommand.php
index b64d2b3..b9b530b 100644
--- a/src/Swoole/Command/StopCommand.php
+++ b/src/Swoole/Command/StopCommand.php
@@ -18,7 +18,7 @@ class StopCommand extends Command
 {
     use IsRunningTrait;
 
-    public const HELP = <<<'EOH'
+    public const string HELP = <<<'EOH'
 Stop the web server. Kills all worker processes and stops the web server.
 
 This command is only relevant when the server was started using the
diff --git a/src/Swoole/PidManager.php b/src/Swoole/PidManager.php
index 427d529..19a3c1d 100644
--- a/src/Swoole/PidManager.php
+++ b/src/Swoole/PidManager.php
@@ -17,7 +17,7 @@
 
 class PidManager
 {
-    public function __construct(private string $pidFile)
+    public function __construct(private readonly string $pidFile)
     {
     }
 
diff --git a/src/Swoole/ServerFactory.php b/src/Swoole/ServerFactory.php
index 5f7a59f..0f5be88 100644
--- a/src/Swoole/ServerFactory.php
+++ b/src/Swoole/ServerFactory.php
@@ -31,22 +31,16 @@
 
 class ServerFactory
 {
-    /**
-     * @var string
-     */
-    public const DEFAULT_HOST = '127.0.0.1';
+    public const string DEFAULT_HOST = '127.0.0.1';
 
-    /**
-     * @var int
-     */
-    public const DEFAULT_PORT = 8080;
+    public const int DEFAULT_PORT = 8080;
 
     /**
      * Swoole server supported modes
      *
      * @var int[]
      */
-    private const MODES = [
+    private const array MODES = [
         SWOOLE_BASE,
         SWOOLE_PROCESS,
     ];
@@ -56,7 +50,7 @@ class ServerFactory
      *
      * @var int[]
      */
-    private const PROTOCOLS = [
+    private const array PROTOCOLS = [
         SWOOLE_SOCK_TCP,
         SWOOLE_SOCK_TCP6,
         SWOOLE_SOCK_UDP,
diff --git a/test/App/Message/MessageHandlerTest.php b/test/App/Message/MessageHandlerTest.php
index 4c2277a..e33d14a 100644
--- a/test/App/Message/MessageHandlerTest.php
+++ b/test/App/Message/MessageHandlerTest.php
@@ -65,7 +65,7 @@ public function testControlMessageDoesNotThrowAndDoesNotSetRetryCount(): void
         $message = new Message(['foo' => 'control']);
         $handler($message);
 
-        $payload = $message->getPayload();
+        $payload = $message->payload;
         $this->assertArrayNotHasKey('retry_count', $payload);
     }
 
@@ -81,7 +81,7 @@ public function testRetryMessageThrowsExceptionAndSetsRetryCount(): void
         try {
             $handler($message);
         } finally {
-            $payload = $message->getPayload();
+            $payload = $message->payload;
             $this->assertArrayHasKey('retry_count', $payload);
             $this->assertEquals(1, $payload['retry_count']); // first retry
         }
@@ -101,7 +101,7 @@ public function testRetryMessageWithExistingRetryCountIncrementsIt(): void
         try {
             $handler($message);
         } finally {
-            $payload = $message->getPayload();
+            $payload = $message->payload;
             $this->assertEquals(3, $payload['retry_count']); // incremented from 2 → 3
         }
     }
diff --git a/test/App/Message/MessageTest.php b/test/App/Message/MessageTest.php
index 8c733a6..3f9d317 100644
--- a/test/App/Message/MessageTest.php
+++ b/test/App/Message/MessageTest.php
@@ -12,6 +12,6 @@ class MessageTest extends TestCase
     public function testMessageAccessors(): void
     {
         $admin = new Message(['payload' => 'test message payload']);
-        $this->assertSame(['payload' => 'test message payload'], $admin->getPayload());
+        $this->assertSame(['payload' => 'test message payload'], $admin->payload);
     }
 }
diff --git a/test/Swoole/Delegators/TCPServerDelegatorTest.php b/test/Swoole/Delegators/TCPServerDelegatorTest.php
index 15d690e..1f419b2 100644
--- a/test/Swoole/Delegators/TCPServerDelegatorTest.php
+++ b/test/Swoole/Delegators/TCPServerDelegatorTest.php
@@ -132,10 +132,10 @@ public function testReceiveDispatchesMessagesAndLogsWhenUnknownCommand(): void
 
                 if ($callCount === 1) {
                     $this->assertInstanceOf(Message::class, $message);
-                    $this->assertEquals('hello', $message->getPayload()['foo']);
+                    $this->assertEquals('hello', $message->payload['foo']);
                 } elseif ($callCount === 2) {
                     $this->assertInstanceOf(Message::class, $message);
-                    $this->assertEquals('with 5 seconds delay', $message->getPayload()['foo']);
+                    $this->assertEquals('with 5 seconds delay', $message->payload['foo']);
                 } else {
                     $this->fail('dispatch called more than twice');
                 }