diff --git a/src/Symfony/Component/Notifier/Message/ChatMessage.php b/src/Symfony/Component/Notifier/Message/ChatMessage.php
index 7a1e0909b6101..6a16280d032d7 100644
--- a/src/Symfony/Component/Notifier/Message/ChatMessage.php
+++ b/src/Symfony/Component/Notifier/Message/ChatMessage.php
@@ -16,7 +16,7 @@
 /**
  * @author Fabien Potencier <fabien@symfony.com>
  */
-final class ChatMessage implements MessageInterface
+class ChatMessage implements MessageInterface
 {
     private ?string $transport = null;
     private string $subject;
diff --git a/src/Symfony/Component/Notifier/Message/EmailMessage.php b/src/Symfony/Component/Notifier/Message/EmailMessage.php
index 7ae4ba05e5854..427885f19320f 100644
--- a/src/Symfony/Component/Notifier/Message/EmailMessage.php
+++ b/src/Symfony/Component/Notifier/Message/EmailMessage.php
@@ -23,7 +23,7 @@
 /**
  * @author Fabien Potencier <fabien@symfony.com>
  */
-final class EmailMessage implements MessageInterface
+class EmailMessage implements MessageInterface
 {
     private RawMessage $message;
     private ?Envelope $envelope;
diff --git a/src/Symfony/Component/Notifier/Message/PushMessage.php b/src/Symfony/Component/Notifier/Message/PushMessage.php
index 5919b0a5eba4f..063e8e9cb6d2f 100644
--- a/src/Symfony/Component/Notifier/Message/PushMessage.php
+++ b/src/Symfony/Component/Notifier/Message/PushMessage.php
@@ -16,7 +16,7 @@
 /**
  * @author Tomas Norkūnas <norkunas.tom@gmail.com>
  */
-final class PushMessage implements MessageInterface
+class PushMessage implements MessageInterface
 {
     private $transport;
     private $subject;
diff --git a/src/Symfony/Component/Notifier/Message/SmsMessage.php b/src/Symfony/Component/Notifier/Message/SmsMessage.php
index 7180561334f87..259696d989e17 100644
--- a/src/Symfony/Component/Notifier/Message/SmsMessage.php
+++ b/src/Symfony/Component/Notifier/Message/SmsMessage.php
@@ -18,7 +18,7 @@
 /**
  * @author Fabien Potencier <fabien@symfony.com>
  */
-final class SmsMessage implements MessageInterface
+class SmsMessage implements MessageInterface
 {
     private ?string $transport = null;
     private string $subject;