diff --git a/CHANGELOG-4.3.md b/CHANGELOG-4.3.md
index 26e086b34e..9f06cb0767 100644
--- a/CHANGELOG-4.3.md
+++ b/CHANGELOG-4.3.md
@@ -7,6 +7,26 @@ in 4.3 minor versions.
 To get the diff for a specific change, go to https://github.com/symfony/symfony/commit/XXX where XXX is the change hash
 To get the diff between two versions, go to https://github.com/symfony/symfony/compare/v4.3.0...v4.3.1
 
+* 4.3.0-RC1 (2019-05-28)
+
+ * bug #31650 Create an abstract HTTP transport and extend it in all HTTP transports (bocharsky-bw)
+ * feature #31641 [HttpClient] make $response->getInfo('debug') return extended logs about the HTTP transaction (nicolas-grekas)
+ * feature #31571 [Contracts] split in one package per sub-contracts (nicolas-grekas)
+ * bug #31625 [Messenger] Disable the SchemaAssetsFilter when setup the transport (vincenttouzet)
+ * bug #31621 [Messenger] Fix missing auto_setup for RedisTransport (chalasr)
+ * bug #31584 [Workflow] Do not trigger extra guards (lyrixx)
+ * bug #31632 [Messenger] Use "real" memory usage to honor --memory-limit (chalasr)
+ * bug #31610 [HttpClient] fix handling exceptions thrown before first mock chunk (nicolas-grekas)
+ * bug #31615 Allow WrappedListener to describe uncallable listeners (derrabus)
+ * bug #31599 [Translation] Fixed issue with new vs old TranslatorInterface in TranslationDataCollector (althaus)
+ * bug #31565 [Mime][HttpFoundation] Added mime type audio/x-hx-aac-adts (ifaridjalilov)
+ * bug #31591 [FrameworkBundle] fix named autowiring aliases for TagAwareCacheInterface (nicolas-grekas)
+ * bug #31590 [Cache] improve logged messages (nicolas-grekas)
+ * bug #31586 [HttpClient] display proper error message on TransportException when curl is used (nicolas-grekas)
+ * bug #31349 [WebProfilerBundle] Use absolute URL for profiler links (Alumbrados)
+ * bug #31541 [DI] fix using bindings with locators of service subscribers (nicolas-grekas)
+ * bug #31568 [Process] Fix infinite waiting for stopped process (mshavliuk)
+
 * 4.3.0-BETA2 (2019-05-22)
 
  * bug #31569 [HttpClient] Only use CURLMOPT_MAX_HOST_CONNECTIONS & CURL_VERSION_HTTP2 if defined (GawainLynch)
diff --git a/src/Symfony/Bridge/Doctrine/Messenger/DoctrineTransactionMiddleware.php b/src/Symfony/Bridge/Doctrine/Messenger/DoctrineTransactionMiddleware.php
index 0c207567ca..ad0d87b97c 100644
--- a/src/Symfony/Bridge/Doctrine/Messenger/DoctrineTransactionMiddleware.php
+++ b/src/Symfony/Bridge/Doctrine/Messenger/DoctrineTransactionMiddleware.php
@@ -22,7 +22,7 @@ use Symfony\Component\Messenger\Middleware\StackInterface;
  *
  * @author Tobias Nyholm <tobias.nyholm@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class DoctrineTransactionMiddleware implements MiddlewareInterface
 {
diff --git a/src/Symfony/Component/Mailer/Bridge/Amazon/Http/SesTransport.php b/src/Symfony/Component/Mailer/Bridge/Amazon/Http/SesTransport.php
index df635c4b1c..fd3787a5c2 100644
--- a/src/Symfony/Component/Mailer/Bridge/Amazon/Http/SesTransport.php
+++ b/src/Symfony/Component/Mailer/Bridge/Amazon/Http/SesTransport.php
@@ -13,10 +13,9 @@ namespace Symfony\Component\Mailer\Bridge\Amazon\Http;
 
 use Psr\Log\LoggerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\HttpClient\HttpClient;
 use Symfony\Component\Mailer\Exception\TransportException;
 use Symfony\Component\Mailer\SentMessage;
-use Symfony\Component\Mailer\Transport\AbstractTransport;
+use Symfony\Component\Mailer\Transport\Http\AbstractHttpTransport;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 /**
@@ -24,11 +23,10 @@ use Symfony\Contracts\HttpClient\HttpClientInterface;
  *
  * @experimental in 4.3
  */
-class SesTransport extends AbstractTransport
+class SesTransport extends AbstractHttpTransport
 {
     private const ENDPOINT = 'https://email.%region%.amazonaws.com';
 
-    private $client;
     private $accessKey;
     private $secretKey;
     private $region;
@@ -38,12 +36,11 @@ class SesTransport extends AbstractTransport
      */
     public function __construct(string $accessKey, string $secretKey, string $region = null, HttpClientInterface $client = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
     {
-        $this->client = $client ?? HttpClient::create();
         $this->accessKey = $accessKey;
         $this->secretKey = $secretKey;
         $this->region = $region ?: 'eu-west-1';
 
-        parent::__construct($dispatcher, $logger);
+        parent::__construct($client, $dispatcher, $logger);
     }
 
     protected function doSend(SentMessage $message): void
diff --git a/src/Symfony/Component/Mailer/Bridge/Mailchimp/Http/MandrillTransport.php b/src/Symfony/Component/Mailer/Bridge/Mailchimp/Http/MandrillTransport.php
index a54251d9b4..ea8bcf4dbb 100644
--- a/src/Symfony/Component/Mailer/Bridge/Mailchimp/Http/MandrillTransport.php
+++ b/src/Symfony/Component/Mailer/Bridge/Mailchimp/Http/MandrillTransport.php
@@ -13,10 +13,9 @@ namespace Symfony\Component\Mailer\Bridge\Mailchimp\Http;
 
 use Psr\Log\LoggerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\HttpClient\HttpClient;
 use Symfony\Component\Mailer\Exception\TransportException;
 use Symfony\Component\Mailer\SentMessage;
-use Symfony\Component\Mailer\Transport\AbstractTransport;
+use Symfony\Component\Mailer\Transport\Http\AbstractHttpTransport;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 /**
@@ -24,18 +23,16 @@ use Symfony\Contracts\HttpClient\HttpClientInterface;
  *
  * @experimental in 4.3
  */
-class MandrillTransport extends AbstractTransport
+class MandrillTransport extends AbstractHttpTransport
 {
     private const ENDPOINT = 'https://mandrillapp.com/api/1.0/messages/send-raw.json';
-    private $client;
     private $key;
 
     public function __construct(string $key, HttpClientInterface $client = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
     {
         $this->key = $key;
-        $this->client = $client ?? HttpClient::create();
 
-        parent::__construct($dispatcher, $logger);
+        parent::__construct($client, $dispatcher, $logger);
     }
 
     protected function doSend(SentMessage $message): void
diff --git a/src/Symfony/Component/Mailer/Bridge/Mailgun/Http/MailgunTransport.php b/src/Symfony/Component/Mailer/Bridge/Mailgun/Http/MailgunTransport.php
index 940cabc6ea..2d3fe15a08 100644
--- a/src/Symfony/Component/Mailer/Bridge/Mailgun/Http/MailgunTransport.php
+++ b/src/Symfony/Component/Mailer/Bridge/Mailgun/Http/MailgunTransport.php
@@ -13,10 +13,9 @@ namespace Symfony\Component\Mailer\Bridge\Mailgun\Http;
 
 use Psr\Log\LoggerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\HttpClient\HttpClient;
 use Symfony\Component\Mailer\Exception\TransportException;
 use Symfony\Component\Mailer\SentMessage;
-use Symfony\Component\Mailer\Transport\AbstractTransport;
+use Symfony\Component\Mailer\Transport\Http\AbstractHttpTransport;
 use Symfony\Component\Mime\Part\DataPart;
 use Symfony\Component\Mime\Part\Multipart\FormDataPart;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
@@ -26,20 +25,18 @@ use Symfony\Contracts\HttpClient\HttpClientInterface;
  *
  * @experimental in 4.3
  */
-class MailgunTransport extends AbstractTransport
+class MailgunTransport extends AbstractHttpTransport
 {
     private const ENDPOINT = 'https://api.mailgun.net/v3/%domain%/messages.mime';
     private $key;
     private $domain;
-    private $client;
 
     public function __construct(string $key, string $domain, HttpClientInterface $client = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
     {
         $this->key = $key;
         $this->domain = $domain;
-        $this->client = $client ?? HttpClient::create();
 
-        parent::__construct($dispatcher, $logger);
+        parent::__construct($client, $dispatcher, $logger);
     }
 
     protected function doSend(SentMessage $message): void
diff --git a/src/Symfony/Component/Mailer/Transport/Http/AbstractHttpTransport.php b/src/Symfony/Component/Mailer/Transport/Http/AbstractHttpTransport.php
new file mode 100644
index 0000000000..f431c2fe85
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Transport/Http/AbstractHttpTransport.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mailer\Transport\Http;
+
+use Psr\Log\LoggerInterface;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\HttpClient\HttpClient;
+use Symfony\Component\Mailer\Transport\AbstractTransport;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+
+/**
+ * @author Victor Bocharsky <victor@symfonycasts.com>
+ *
+ * @experimental in 4.3
+ */
+abstract class AbstractHttpTransport extends AbstractTransport
+{
+    protected $client;
+
+    public function __construct(HttpClientInterface $client = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
+    {
+        $this->client = $client;
+        if (null === $client) {
+            if (!class_exists(HttpClient::class)) {
+                throw new \LogicException(sprintf('You cannot use "%s" as the HttpClient component is not installed. Try running "composer require symfony/http-client".', __CLASS__));
+            }
+
+            $this->client = HttpClient::create();
+        }
+
+        parent::__construct($dispatcher, $logger);
+    }
+}
diff --git a/src/Symfony/Component/Messenger/Command/ConsumeMessagesCommand.php b/src/Symfony/Component/Messenger/Command/ConsumeMessagesCommand.php
index 4ad5dfb278..0e91cfc795 100644
--- a/src/Symfony/Component/Messenger/Command/ConsumeMessagesCommand.php
+++ b/src/Symfony/Component/Messenger/Command/ConsumeMessagesCommand.php
@@ -34,7 +34,7 @@ use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class ConsumeMessagesCommand extends Command
 {
diff --git a/src/Symfony/Component/Messenger/Command/DebugCommand.php b/src/Symfony/Component/Messenger/Command/DebugCommand.php
index 592b457207..2fba6f02f5 100644
--- a/src/Symfony/Component/Messenger/Command/DebugCommand.php
+++ b/src/Symfony/Component/Messenger/Command/DebugCommand.php
@@ -23,7 +23,7 @@ use Symfony\Component\Console\Style\SymfonyStyle;
  *
  * @author Roland Franssen <franssen.roland@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class DebugCommand extends Command
 {
diff --git a/src/Symfony/Component/Messenger/DataCollector/MessengerDataCollector.php b/src/Symfony/Component/Messenger/DataCollector/MessengerDataCollector.php
index 5d33f735b2..f8356ce3e2 100644
--- a/src/Symfony/Component/Messenger/DataCollector/MessengerDataCollector.php
+++ b/src/Symfony/Component/Messenger/DataCollector/MessengerDataCollector.php
@@ -21,7 +21,7 @@ use Symfony\Component\VarDumper\Caster\ClassStub;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class MessengerDataCollector extends DataCollector implements LateDataCollectorInterface
 {
diff --git a/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php b/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
index 201688944d..bc5f0290c3 100644
--- a/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
+++ b/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
@@ -28,7 +28,7 @@ use Symfony\Component\Messenger\Transport\Receiver\ReceiverInterface;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class MessengerPass implements CompilerPassInterface
 {
diff --git a/src/Symfony/Component/Messenger/Envelope.php b/src/Symfony/Component/Messenger/Envelope.php
index 825ebf79e4..be012fba94 100644
--- a/src/Symfony/Component/Messenger/Envelope.php
+++ b/src/Symfony/Component/Messenger/Envelope.php
@@ -18,7 +18,7 @@ use Symfony\Component\Messenger\Stamp\StampInterface;
  *
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 final class Envelope
 {
diff --git a/src/Symfony/Component/Messenger/Exception/ExceptionInterface.php b/src/Symfony/Component/Messenger/Exception/ExceptionInterface.php
index a09d87d797..59f0e1e981 100644
--- a/src/Symfony/Component/Messenger/Exception/ExceptionInterface.php
+++ b/src/Symfony/Component/Messenger/Exception/ExceptionInterface.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Messenger\Exception;
  *
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface ExceptionInterface extends \Throwable
 {
diff --git a/src/Symfony/Component/Messenger/Exception/InvalidArgumentException.php b/src/Symfony/Component/Messenger/Exception/InvalidArgumentException.php
index 2b34ef0210..1d0755f8c3 100644
--- a/src/Symfony/Component/Messenger/Exception/InvalidArgumentException.php
+++ b/src/Symfony/Component/Messenger/Exception/InvalidArgumentException.php
@@ -14,7 +14,7 @@ namespace Symfony\Component\Messenger\Exception;
 /**
  * @author Yonel Ceruto <yonelceruto@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class InvalidArgumentException extends \InvalidArgumentException implements ExceptionInterface
 {
diff --git a/src/Symfony/Component/Messenger/Exception/LogicException.php b/src/Symfony/Component/Messenger/Exception/LogicException.php
index 72bd09438c..6142bd3001 100644
--- a/src/Symfony/Component/Messenger/Exception/LogicException.php
+++ b/src/Symfony/Component/Messenger/Exception/LogicException.php
@@ -14,7 +14,7 @@ namespace Symfony\Component\Messenger\Exception;
 /**
  * @author Roland Franssen <franssen.roland@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class LogicException extends \LogicException implements ExceptionInterface
 {
diff --git a/src/Symfony/Component/Messenger/Exception/NoHandlerForMessageException.php b/src/Symfony/Component/Messenger/Exception/NoHandlerForMessageException.php
index 6251787011..a3fc0fa414 100644
--- a/src/Symfony/Component/Messenger/Exception/NoHandlerForMessageException.php
+++ b/src/Symfony/Component/Messenger/Exception/NoHandlerForMessageException.php
@@ -14,7 +14,7 @@ namespace Symfony\Component\Messenger\Exception;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class NoHandlerForMessageException extends \LogicException implements ExceptionInterface
 {
diff --git a/src/Symfony/Component/Messenger/Exception/RuntimeException.php b/src/Symfony/Component/Messenger/Exception/RuntimeException.php
index 7253550ab3..de9d7ade56 100644
--- a/src/Symfony/Component/Messenger/Exception/RuntimeException.php
+++ b/src/Symfony/Component/Messenger/Exception/RuntimeException.php
@@ -14,7 +14,7 @@ namespace Symfony\Component\Messenger\Exception;
 /**
  * @author Fabien Potencier <fabien@symfony.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class RuntimeException extends \RuntimeException implements ExceptionInterface
 {
diff --git a/src/Symfony/Component/Messenger/Exception/TransportException.php b/src/Symfony/Component/Messenger/Exception/TransportException.php
index e94daba209..aaef407b23 100644
--- a/src/Symfony/Component/Messenger/Exception/TransportException.php
+++ b/src/Symfony/Component/Messenger/Exception/TransportException.php
@@ -14,7 +14,7 @@ namespace Symfony\Component\Messenger\Exception;
 /**
  * @author Eric Masoero <em@studeal.fr>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class TransportException extends RuntimeException
 {
diff --git a/src/Symfony/Component/Messenger/Exception/ValidationFailedException.php b/src/Symfony/Component/Messenger/Exception/ValidationFailedException.php
index 414f8a6e92..a05a213526 100644
--- a/src/Symfony/Component/Messenger/Exception/ValidationFailedException.php
+++ b/src/Symfony/Component/Messenger/Exception/ValidationFailedException.php
@@ -16,7 +16,7 @@ use Symfony\Component\Validator\ConstraintViolationListInterface;
 /**
  * @author Tobias Nyholm <tobias.nyholm@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class ValidationFailedException extends \RuntimeException implements ExceptionInterface
 {
diff --git a/src/Symfony/Component/Messenger/HandleTrait.php b/src/Symfony/Component/Messenger/HandleTrait.php
index e452b82e24..1cfec237c1 100644
--- a/src/Symfony/Component/Messenger/HandleTrait.php
+++ b/src/Symfony/Component/Messenger/HandleTrait.php
@@ -19,7 +19,7 @@ use Symfony\Component\Messenger\Stamp\HandledStamp;
  *
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 trait HandleTrait
 {
diff --git a/src/Symfony/Component/Messenger/Handler/HandlersLocator.php b/src/Symfony/Component/Messenger/Handler/HandlersLocator.php
index fe83e9288e..dda15efba1 100644
--- a/src/Symfony/Component/Messenger/Handler/HandlersLocator.php
+++ b/src/Symfony/Component/Messenger/Handler/HandlersLocator.php
@@ -20,7 +20,7 @@ use Symfony\Component\Messenger\Stamp\ReceivedStamp;
  * @author Nicolas Grekas <p@tchwork.com>
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class HandlersLocator implements HandlersLocatorInterface
 {
diff --git a/src/Symfony/Component/Messenger/Handler/HandlersLocatorInterface.php b/src/Symfony/Component/Messenger/Handler/HandlersLocatorInterface.php
index 80d7786aee..8b80a64950 100644
--- a/src/Symfony/Component/Messenger/Handler/HandlersLocatorInterface.php
+++ b/src/Symfony/Component/Messenger/Handler/HandlersLocatorInterface.php
@@ -18,7 +18,7 @@ use Symfony\Component\Messenger\Envelope;
  *
  * @author Nicolas Grekas <p@tchwork.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface HandlersLocatorInterface
 {
diff --git a/src/Symfony/Component/Messenger/Handler/MessageHandlerInterface.php b/src/Symfony/Component/Messenger/Handler/MessageHandlerInterface.php
index 2ea9380e4e..00329bc726 100644
--- a/src/Symfony/Component/Messenger/Handler/MessageHandlerInterface.php
+++ b/src/Symfony/Component/Messenger/Handler/MessageHandlerInterface.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Messenger\Handler;
  *
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface MessageHandlerInterface
 {
diff --git a/src/Symfony/Component/Messenger/Handler/MessageSubscriberInterface.php b/src/Symfony/Component/Messenger/Handler/MessageSubscriberInterface.php
index 2b85d46471..f1fe29c568 100644
--- a/src/Symfony/Component/Messenger/Handler/MessageSubscriberInterface.php
+++ b/src/Symfony/Component/Messenger/Handler/MessageSubscriberInterface.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Messenger\Handler;
  *
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface MessageSubscriberInterface extends MessageHandlerInterface
 {
diff --git a/src/Symfony/Component/Messenger/MessageBus.php b/src/Symfony/Component/Messenger/MessageBus.php
index 0698f8e81a..1f0ff6ac12 100644
--- a/src/Symfony/Component/Messenger/MessageBus.php
+++ b/src/Symfony/Component/Messenger/MessageBus.php
@@ -19,7 +19,7 @@ use Symfony\Component\Messenger\Middleware\StackMiddleware;
  * @author Matthias Noback <matthiasnoback@gmail.com>
  * @author Nicolas Grekas <p@tchwork.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class MessageBus implements MessageBusInterface
 {
diff --git a/src/Symfony/Component/Messenger/MessageBusInterface.php b/src/Symfony/Component/Messenger/MessageBusInterface.php
index 58b7a631b5..80a58613f2 100644
--- a/src/Symfony/Component/Messenger/MessageBusInterface.php
+++ b/src/Symfony/Component/Messenger/MessageBusInterface.php
@@ -16,7 +16,7 @@ use Symfony\Component\Messenger\Stamp\StampInterface;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface MessageBusInterface
 {
diff --git a/src/Symfony/Component/Messenger/Middleware/ActivationMiddleware.php b/src/Symfony/Component/Messenger/Middleware/ActivationMiddleware.php
index 39dcc423ea..88290fea9f 100644
--- a/src/Symfony/Component/Messenger/Middleware/ActivationMiddleware.php
+++ b/src/Symfony/Component/Messenger/Middleware/ActivationMiddleware.php
@@ -18,7 +18,7 @@ use Symfony\Component\Messenger\Envelope;
  *
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class ActivationMiddleware implements MiddlewareInterface
 {
diff --git a/src/Symfony/Component/Messenger/Middleware/HandleMessageMiddleware.php b/src/Symfony/Component/Messenger/Middleware/HandleMessageMiddleware.php
index 25db71c6f0..f018d5b6a1 100644
--- a/src/Symfony/Component/Messenger/Middleware/HandleMessageMiddleware.php
+++ b/src/Symfony/Component/Messenger/Middleware/HandleMessageMiddleware.php
@@ -23,7 +23,7 @@ use Symfony\Component\Messenger\Stamp\HandledStamp;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class HandleMessageMiddleware implements MiddlewareInterface
 {
diff --git a/src/Symfony/Component/Messenger/Middleware/MiddlewareInterface.php b/src/Symfony/Component/Messenger/Middleware/MiddlewareInterface.php
index 674bca7e95..ffa427ddef 100644
--- a/src/Symfony/Component/Messenger/Middleware/MiddlewareInterface.php
+++ b/src/Symfony/Component/Messenger/Middleware/MiddlewareInterface.php
@@ -16,7 +16,7 @@ use Symfony\Component\Messenger\Envelope;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface MiddlewareInterface
 {
diff --git a/src/Symfony/Component/Messenger/Middleware/SendMessageMiddleware.php b/src/Symfony/Component/Messenger/Middleware/SendMessageMiddleware.php
index e7dc0baa2a..2d401bc850 100644
--- a/src/Symfony/Component/Messenger/Middleware/SendMessageMiddleware.php
+++ b/src/Symfony/Component/Messenger/Middleware/SendMessageMiddleware.php
@@ -26,7 +26,7 @@ use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
  * @author Samuel Roze <samuel.roze@gmail.com>
  * @author Tobias Schultze <http://tobion.de>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class SendMessageMiddleware implements MiddlewareInterface
 {
diff --git a/src/Symfony/Component/Messenger/Middleware/StackInterface.php b/src/Symfony/Component/Messenger/Middleware/StackInterface.php
index 17f0acf4ab..47c4c59229 100644
--- a/src/Symfony/Component/Messenger/Middleware/StackInterface.php
+++ b/src/Symfony/Component/Messenger/Middleware/StackInterface.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Messenger\Middleware;
  *
  * Implementations must be cloneable, and each clone must unstack the stack independently.
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface StackInterface
 {
diff --git a/src/Symfony/Component/Messenger/Middleware/StackMiddleware.php b/src/Symfony/Component/Messenger/Middleware/StackMiddleware.php
index 4c1c597cf7..864a8612a1 100644
--- a/src/Symfony/Component/Messenger/Middleware/StackMiddleware.php
+++ b/src/Symfony/Component/Messenger/Middleware/StackMiddleware.php
@@ -16,7 +16,7 @@ use Symfony\Component\Messenger\Envelope;
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class StackMiddleware implements MiddlewareInterface, StackInterface
 {
diff --git a/src/Symfony/Component/Messenger/Middleware/TraceableMiddleware.php b/src/Symfony/Component/Messenger/Middleware/TraceableMiddleware.php
index 771c14633e..ea017f3e95 100644
--- a/src/Symfony/Component/Messenger/Middleware/TraceableMiddleware.php
+++ b/src/Symfony/Component/Messenger/Middleware/TraceableMiddleware.php
@@ -19,7 +19,7 @@ use Symfony\Component\Stopwatch\Stopwatch;
  *
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class TraceableMiddleware implements MiddlewareInterface
 {
diff --git a/src/Symfony/Component/Messenger/Middleware/ValidationMiddleware.php b/src/Symfony/Component/Messenger/Middleware/ValidationMiddleware.php
index 21693ebf34..81dfbe7534 100644
--- a/src/Symfony/Component/Messenger/Middleware/ValidationMiddleware.php
+++ b/src/Symfony/Component/Messenger/Middleware/ValidationMiddleware.php
@@ -19,7 +19,7 @@ use Symfony\Component\Validator\Validator\ValidatorInterface;
 /**
  * @author Tobias Nyholm <tobias.nyholm@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class ValidationMiddleware implements MiddlewareInterface
 {
diff --git a/src/Symfony/Component/Messenger/Stamp/HandledStamp.php b/src/Symfony/Component/Messenger/Stamp/HandledStamp.php
index c7987866f5..2002d08fdd 100644
--- a/src/Symfony/Component/Messenger/Stamp/HandledStamp.php
+++ b/src/Symfony/Component/Messenger/Stamp/HandledStamp.php
@@ -21,7 +21,7 @@ use Symfony\Component\Messenger\Handler\HandlerDescriptor;
  *
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 final class HandledStamp implements StampInterface
 {
diff --git a/src/Symfony/Component/Messenger/Stamp/ReceivedStamp.php b/src/Symfony/Component/Messenger/Stamp/ReceivedStamp.php
index 07e998f720..3296cde1d3 100644
--- a/src/Symfony/Component/Messenger/Stamp/ReceivedStamp.php
+++ b/src/Symfony/Component/Messenger/Stamp/ReceivedStamp.php
@@ -23,7 +23,7 @@ use Symfony\Component\Messenger\Middleware\SendMessageMiddleware;
  *
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 final class ReceivedStamp implements StampInterface
 {
diff --git a/src/Symfony/Component/Messenger/Stamp/SentStamp.php b/src/Symfony/Component/Messenger/Stamp/SentStamp.php
index b0b8da8b16..3f1a8f7186 100644
--- a/src/Symfony/Component/Messenger/Stamp/SentStamp.php
+++ b/src/Symfony/Component/Messenger/Stamp/SentStamp.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\Messenger\Stamp;
  *
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 final class SentStamp implements StampInterface
 {
diff --git a/src/Symfony/Component/Messenger/Stamp/SerializerStamp.php b/src/Symfony/Component/Messenger/Stamp/SerializerStamp.php
index 4b869e2b32..0ab43950f4 100644
--- a/src/Symfony/Component/Messenger/Stamp/SerializerStamp.php
+++ b/src/Symfony/Component/Messenger/Stamp/SerializerStamp.php
@@ -14,7 +14,7 @@ namespace Symfony\Component\Messenger\Stamp;
 /**
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 final class SerializerStamp implements StampInterface
 {
diff --git a/src/Symfony/Component/Messenger/Stamp/StampInterface.php b/src/Symfony/Component/Messenger/Stamp/StampInterface.php
index fc82ac75e4..8c29a444c1 100644
--- a/src/Symfony/Component/Messenger/Stamp/StampInterface.php
+++ b/src/Symfony/Component/Messenger/Stamp/StampInterface.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\Messenger\Stamp;
  *
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface StampInterface
 {
diff --git a/src/Symfony/Component/Messenger/Stamp/ValidationStamp.php b/src/Symfony/Component/Messenger/Stamp/ValidationStamp.php
index e031f04d3a..bdd28ac4cc 100644
--- a/src/Symfony/Component/Messenger/Stamp/ValidationStamp.php
+++ b/src/Symfony/Component/Messenger/Stamp/ValidationStamp.php
@@ -16,7 +16,7 @@ use Symfony\Component\Validator\Constraints\GroupSequence;
 /**
  * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 final class ValidationStamp implements StampInterface
 {
diff --git a/src/Symfony/Component/Messenger/Test/Middleware/MiddlewareTestCase.php b/src/Symfony/Component/Messenger/Test/Middleware/MiddlewareTestCase.php
index 5970cf285f..e02bd6e6d4 100644
--- a/src/Symfony/Component/Messenger/Test/Middleware/MiddlewareTestCase.php
+++ b/src/Symfony/Component/Messenger/Test/Middleware/MiddlewareTestCase.php
@@ -20,7 +20,7 @@ use Symfony\Component\Messenger\Middleware\StackMiddleware;
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 abstract class MiddlewareTestCase extends TestCase
 {
diff --git a/src/Symfony/Component/Messenger/TraceableMessageBus.php b/src/Symfony/Component/Messenger/TraceableMessageBus.php
index f370c6d8aa..e8ef5b0907 100644
--- a/src/Symfony/Component/Messenger/TraceableMessageBus.php
+++ b/src/Symfony/Component/Messenger/TraceableMessageBus.php
@@ -14,7 +14,7 @@ namespace Symfony\Component\Messenger;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class TraceableMessageBus implements MessageBusInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpFactory.php b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpFactory.php
index aa1dca15f1..5ea6f6ccbe 100644
--- a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpFactory.php
+++ b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpFactory.php
@@ -12,7 +12,7 @@
 namespace Symfony\Component\Messenger\Transport\AmqpExt;
 
 /**
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class AmqpFactory
 {
diff --git a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpReceiver.php b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpReceiver.php
index db2f1202f9..3c0f48eaa2 100644
--- a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpReceiver.php
+++ b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpReceiver.php
@@ -25,7 +25,7 @@ use Symfony\Component\Messenger\Transport\Serialization\SerializerInterface;
  *
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class AmqpReceiver implements ReceiverInterface, MessageCountAwareInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpSender.php b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpSender.php
index b873312a67..c570c4cb33 100644
--- a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpSender.php
+++ b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpSender.php
@@ -23,7 +23,7 @@ use Symfony\Component\Messenger\Transport\Serialization\SerializerInterface;
  *
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class AmqpSender implements SenderInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpTransport.php b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpTransport.php
index 242a138230..2c3e2c3d57 100644
--- a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpTransport.php
+++ b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpTransport.php
@@ -21,7 +21,7 @@ use Symfony\Component\Messenger\Transport\TransportInterface;
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class AmqpTransport implements TransportInterface, SetupableTransportInterface, MessageCountAwareInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpTransportFactory.php b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpTransportFactory.php
index d4293e1207..35cb4eb1c4 100644
--- a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpTransportFactory.php
+++ b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpTransportFactory.php
@@ -18,7 +18,7 @@ use Symfony\Component\Messenger\Transport\TransportInterface;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class AmqpTransportFactory implements TransportFactoryInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php b/src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php
index bdd04c56c9..51ef98dd31 100644
--- a/src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php
+++ b/src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php
@@ -20,7 +20,7 @@ use Symfony\Component\Messenger\Exception\InvalidArgumentException;
  *
  * @final
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class Connection
 {
diff --git a/src/Symfony/Component/Messenger/Transport/Receiver/ReceiverInterface.php b/src/Symfony/Component/Messenger/Transport/Receiver/ReceiverInterface.php
index 6393c0d8c1..b053acbd5f 100644
--- a/src/Symfony/Component/Messenger/Transport/Receiver/ReceiverInterface.php
+++ b/src/Symfony/Component/Messenger/Transport/Receiver/ReceiverInterface.php
@@ -18,7 +18,7 @@ use Symfony\Component\Messenger\Exception\TransportException;
  * @author Samuel Roze <samuel.roze@gmail.com>
  * @author Ryan Weaver <ryan@symfonycasts.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface ReceiverInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/Sender/SenderInterface.php b/src/Symfony/Component/Messenger/Transport/Sender/SenderInterface.php
index 719442188f..b0824f9fc9 100644
--- a/src/Symfony/Component/Messenger/Transport/Sender/SenderInterface.php
+++ b/src/Symfony/Component/Messenger/Transport/Sender/SenderInterface.php
@@ -16,7 +16,7 @@ use Symfony\Component\Messenger\Envelope;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface SenderInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/Sender/SendersLocator.php b/src/Symfony/Component/Messenger/Transport/Sender/SendersLocator.php
index 2f7a1e971d..4c83d8a881 100644
--- a/src/Symfony/Component/Messenger/Transport/Sender/SendersLocator.php
+++ b/src/Symfony/Component/Messenger/Transport/Sender/SendersLocator.php
@@ -23,7 +23,7 @@ use Symfony\Component\Messenger\Handler\HandlersLocator;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class SendersLocator implements SendersLocatorInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/Sender/SendersLocatorInterface.php b/src/Symfony/Component/Messenger/Transport/Sender/SendersLocatorInterface.php
index bc9a87b177..9b63ebe225 100644
--- a/src/Symfony/Component/Messenger/Transport/Sender/SendersLocatorInterface.php
+++ b/src/Symfony/Component/Messenger/Transport/Sender/SendersLocatorInterface.php
@@ -20,7 +20,7 @@ use Symfony\Component\Messenger\Exception\UnknownSenderException;
  * @author Samuel Roze <samuel.roze@gmail.com>
  * @author Tobias Schultze <http://tobion.de>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface SendersLocatorInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/Serialization/PhpSerializer.php b/src/Symfony/Component/Messenger/Transport/Serialization/PhpSerializer.php
index b65c0fcf63..793da4a448 100644
--- a/src/Symfony/Component/Messenger/Transport/Serialization/PhpSerializer.php
+++ b/src/Symfony/Component/Messenger/Transport/Serialization/PhpSerializer.php
@@ -18,7 +18,7 @@ use Symfony\Component\Messenger\Stamp\NonSendableStampInterface;
 /**
  * @author Ryan Weaver<ryan@symfonycasts.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class PhpSerializer implements SerializerInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/Serialization/Serializer.php b/src/Symfony/Component/Messenger/Transport/Serialization/Serializer.php
index 798b9a5526..c591acd050 100644
--- a/src/Symfony/Component/Messenger/Transport/Serialization/Serializer.php
+++ b/src/Symfony/Component/Messenger/Transport/Serialization/Serializer.php
@@ -28,7 +28,7 @@ use Symfony\Component\Serializer\SerializerInterface as SymfonySerializerInterfa
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class Serializer implements SerializerInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/Serialization/SerializerInterface.php b/src/Symfony/Component/Messenger/Transport/Serialization/SerializerInterface.php
index 01a4abc16e..492e003f79 100644
--- a/src/Symfony/Component/Messenger/Transport/Serialization/SerializerInterface.php
+++ b/src/Symfony/Component/Messenger/Transport/Serialization/SerializerInterface.php
@@ -17,7 +17,7 @@ use Symfony\Component\Messenger\Exception\MessageDecodingFailedException;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface SerializerInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/TransportFactory.php b/src/Symfony/Component/Messenger/Transport/TransportFactory.php
index 6614ef3a90..85bf85639e 100644
--- a/src/Symfony/Component/Messenger/Transport/TransportFactory.php
+++ b/src/Symfony/Component/Messenger/Transport/TransportFactory.php
@@ -17,7 +17,7 @@ use Symfony\Component\Messenger\Transport\Serialization\SerializerInterface;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 class TransportFactory implements TransportFactoryInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/TransportFactoryInterface.php b/src/Symfony/Component/Messenger/Transport/TransportFactoryInterface.php
index 7c3c3a65cd..42bb4ed7bf 100644
--- a/src/Symfony/Component/Messenger/Transport/TransportFactoryInterface.php
+++ b/src/Symfony/Component/Messenger/Transport/TransportFactoryInterface.php
@@ -18,7 +18,7 @@ use Symfony\Component\Messenger\Transport\Serialization\SerializerInterface;
  *
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface TransportFactoryInterface
 {
diff --git a/src/Symfony/Component/Messenger/Transport/TransportInterface.php b/src/Symfony/Component/Messenger/Transport/TransportInterface.php
index 7a46b332a6..f2e9c9430e 100644
--- a/src/Symfony/Component/Messenger/Transport/TransportInterface.php
+++ b/src/Symfony/Component/Messenger/Transport/TransportInterface.php
@@ -17,7 +17,7 @@ use Symfony\Component\Messenger\Transport\Sender\SenderInterface;
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  */
 interface TransportInterface extends ReceiverInterface, SenderInterface
 {
diff --git a/src/Symfony/Component/Messenger/Worker.php b/src/Symfony/Component/Messenger/Worker.php
index 4018755ff6..4d52eb63ba 100644
--- a/src/Symfony/Component/Messenger/Worker.php
+++ b/src/Symfony/Component/Messenger/Worker.php
@@ -30,7 +30,7 @@ use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 /**
  * @author Samuel Roze <samuel.roze@gmail.com>
  *
- * @experimental in 4.2
+ * @experimental in 4.3
  *
  * @final
  */