diff --git a/src/Symfony/Component/Mime/Encoder/QpEncoder.php b/src/Symfony/Component/Mime/Encoder/QpEncoder.php
index 5b82848cebdca..4ffbaed78e9e4 100644
--- a/src/Symfony/Component/Mime/Encoder/QpEncoder.php
+++ b/src/Symfony/Component/Mime/Encoder/QpEncoder.php
@@ -14,8 +14,6 @@
 use Symfony\Component\Mime\CharacterStream;
 
 /**
- * @final
- *
  * @author Chris Corbyn
  *
  * @experimental in 4.3
diff --git a/src/Symfony/Component/Mime/Header/UnstructuredHeader.php b/src/Symfony/Component/Mime/Header/UnstructuredHeader.php
index 269e00eee8f9f..afb96152570f0 100644
--- a/src/Symfony/Component/Mime/Header/UnstructuredHeader.php
+++ b/src/Symfony/Component/Mime/Header/UnstructuredHeader.php
@@ -14,8 +14,6 @@
 /**
  * A Simple MIME Header.
  *
- * @final
- *
  * @author Chris Corbyn
  *
  * @experimental in 4.3
diff --git a/src/Symfony/Component/Mime/Part/DataPart.php b/src/Symfony/Component/Mime/Part/DataPart.php
index ccbf12ebf4f18..1cfb1e69b08d0 100644
--- a/src/Symfony/Component/Mime/Part/DataPart.php
+++ b/src/Symfony/Component/Mime/Part/DataPart.php
@@ -16,8 +16,6 @@
 use Symfony\Component\Mime\MimeTypes;
 
 /**
- * @final
- *
  * @author Fabien Potencier <fabien@symfony.com>
  *
  * @experimental in 4.3
diff --git a/src/Symfony/Component/Mime/Part/TextPart.php b/src/Symfony/Component/Mime/Part/TextPart.php
index aed312c2408e9..323f62eccec74 100644
--- a/src/Symfony/Component/Mime/Part/TextPart.php
+++ b/src/Symfony/Component/Mime/Part/TextPart.php
@@ -18,8 +18,6 @@
 use Symfony\Component\Mime\Header\Headers;
 
 /**
- * @final
- *
  * @author Fabien Potencier <fabien@symfony.com>
  *
  * @experimental in 4.3