diff --git a/src/Symfony/Component/VarDumper/CHANGELOG.md b/src/Symfony/Component/VarDumper/CHANGELOG.md
index bd57d799df..a4eb962fd3 100644
--- a/src/Symfony/Component/VarDumper/CHANGELOG.md
+++ b/src/Symfony/Component/VarDumper/CHANGELOG.md
@@ -9,6 +9,7 @@ CHANGELOG
  * added `ImagineCaster` and infrastructure to dump images
  * added the stamps of a message after it is dispatched in `TraceableMessageBus` and `MessengerDataCollector` collected data
  * added `UuidCaster`
+ * made all casters final
 
 4.3.0
 -----
diff --git a/src/Symfony/Component/VarDumper/Caster/AmqpCaster.php b/src/Symfony/Component/VarDumper/Caster/AmqpCaster.php
index f1f85b7e2b..1c6a42cd39 100644
--- a/src/Symfony/Component/VarDumper/Caster/AmqpCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/AmqpCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts Amqp related classes to array representation.
  *
  * @author Grégoire Pineau <lyrixx@lyrixx.info>
+ *
+ * @final since Symfony 4.4
  */
 class AmqpCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/DOMCaster.php b/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
index 65151b4f4f..41e52d6b7c 100644
--- a/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts DOM related classes to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class DOMCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/DateCaster.php b/src/Symfony/Component/VarDumper/Caster/DateCaster.php
index 0cc95a8b16..f2f5182662 100644
--- a/src/Symfony/Component/VarDumper/Caster/DateCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/DateCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts DateTimeInterface related classes to array representation.
  *
  * @author Dany Maillard <danymaillard93b@gmail.com>
+ *
+ * @final since Symfony 4.4
  */
 class DateCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/DoctrineCaster.php b/src/Symfony/Component/VarDumper/Caster/DoctrineCaster.php
index 696b87816e..7409508b00 100644
--- a/src/Symfony/Component/VarDumper/Caster/DoctrineCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/DoctrineCaster.php
@@ -20,6 +20,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts Doctrine related classes to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class DoctrineCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/DsCaster.php b/src/Symfony/Component/VarDumper/Caster/DsCaster.php
index 467aadfd76..11423c9b29 100644
--- a/src/Symfony/Component/VarDumper/Caster/DsCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/DsCaster.php
@@ -20,6 +20,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts Ds extension classes to array representation.
  *
  * @author Jáchym Toušek <enumag@gmail.com>
+ *
+ * @final since Symfony 4.4
  */
 class DsCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php b/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
index 5c2ae7daee..d62f7699d4 100644
--- a/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
@@ -19,6 +19,8 @@ use Symfony\Component\VarDumper\Exception\ThrowingCasterException;
  * Casts common Exception classes to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class ExceptionCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/GmpCaster.php b/src/Symfony/Component/VarDumper/Caster/GmpCaster.php
index 504dc07886..2b20e15dc8 100644
--- a/src/Symfony/Component/VarDumper/Caster/GmpCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/GmpCaster.php
@@ -18,6 +18,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  *
  * @author Hamza Amrouche <hamza.simperfit@gmail.com>
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class GmpCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/ImagineCaster.php b/src/Symfony/Component/VarDumper/Caster/ImagineCaster.php
index 2275386ad4..d1289da337 100644
--- a/src/Symfony/Component/VarDumper/Caster/ImagineCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ImagineCaster.php
@@ -17,7 +17,7 @@ use Symfony\Component\VarDumper\Cloner\Stub;
 /**
  * @author Grégoire Pineau <lyrixx@lyrixx.info>
  */
-class ImagineCaster
+final class ImagineCaster
 {
     public static function castImage(ImageInterface $c, array $a, Stub $stub, bool $isNested): array
     {
diff --git a/src/Symfony/Component/VarDumper/Caster/IntlCaster.php b/src/Symfony/Component/VarDumper/Caster/IntlCaster.php
index 31d5cb395f..d7099cb18a 100644
--- a/src/Symfony/Component/VarDumper/Caster/IntlCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/IntlCaster.php
@@ -16,6 +16,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  * @author Jan Schädlich <jan.schaedlich@sensiolabs.de>
+ *
+ * @final since Symfony 4.4
  */
 class IntlCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/MemcachedCaster.php b/src/Symfony/Component/VarDumper/Caster/MemcachedCaster.php
index a32654683d..b0177fa488 100644
--- a/src/Symfony/Component/VarDumper/Caster/MemcachedCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/MemcachedCaster.php
@@ -15,6 +15,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
 
 /**
  * @author Jan Schädlich <jan.schaedlich@sensiolabs.de>
+ *
+ * @final since Symfony 4.4
  */
 class MemcachedCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/PdoCaster.php b/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
index 8af51829a9..d30ab01469 100644
--- a/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts PDO related classes to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class PdoCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/PgSqlCaster.php b/src/Symfony/Component/VarDumper/Caster/PgSqlCaster.php
index cd6bf5b5fe..c54fb42864 100644
--- a/src/Symfony/Component/VarDumper/Caster/PgSqlCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/PgSqlCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts pqsql resources to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class PgSqlCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/ProxyManagerCaster.php b/src/Symfony/Component/VarDumper/Caster/ProxyManagerCaster.php
index d8afd70400..ec02f8137d 100644
--- a/src/Symfony/Component/VarDumper/Caster/ProxyManagerCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ProxyManagerCaster.php
@@ -16,6 +16,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
 
 /**
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class ProxyManagerCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/RedisCaster.php b/src/Symfony/Component/VarDumper/Caster/RedisCaster.php
index 558a0804d5..e92c65baeb 100644
--- a/src/Symfony/Component/VarDumper/Caster/RedisCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/RedisCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts Redis class from ext-redis to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class RedisCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
index 8dfe7ea5ad..a3bbadd538 100644
--- a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts Reflector related classes to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class ReflectionCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/ResourceCaster.php b/src/Symfony/Component/VarDumper/Caster/ResourceCaster.php
index 5d9b80de2a..78b5aab755 100644
--- a/src/Symfony/Component/VarDumper/Caster/ResourceCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ResourceCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts common resource types to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class ResourceCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/SplCaster.php b/src/Symfony/Component/VarDumper/Caster/SplCaster.php
index c6d360e9e0..4901b3c110 100644
--- a/src/Symfony/Component/VarDumper/Caster/SplCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/SplCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts SPL related classes to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class SplCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/SymfonyCaster.php b/src/Symfony/Component/VarDumper/Caster/SymfonyCaster.php
index 34c261e03f..27a45bff26 100644
--- a/src/Symfony/Component/VarDumper/Caster/SymfonyCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/SymfonyCaster.php
@@ -14,6 +14,9 @@ namespace Symfony\Component\VarDumper\Caster;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\VarDumper\Cloner\Stub;
 
+/**
+ * @final since Symfony 4.4
+ */
 class SymfonyCaster
 {
     private static $requestGetters = [
diff --git a/src/Symfony/Component/VarDumper/Caster/UuidCaster.php b/src/Symfony/Component/VarDumper/Caster/UuidCaster.php
index dd68c04223..b102774571 100644
--- a/src/Symfony/Component/VarDumper/Caster/UuidCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/UuidCaster.php
@@ -17,7 +17,7 @@ use Symfony\Component\VarDumper\Cloner\Stub;
 /**
  * @author Grégoire Pineau <lyrixx@lyrixx.info>
  */
-class UuidCaster
+final class UuidCaster
 {
     public static function castRamseyUuid(UuidInterface $c, array $a, Stub $stub, bool $isNested): array
     {
diff --git a/src/Symfony/Component/VarDumper/Caster/XmlReaderCaster.php b/src/Symfony/Component/VarDumper/Caster/XmlReaderCaster.php
index 3ae9ec0ba1..d18e47460c 100644
--- a/src/Symfony/Component/VarDumper/Caster/XmlReaderCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/XmlReaderCaster.php
@@ -16,6 +16,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts XmlReader class to array representation.
  *
  * @author Baptiste Clavié <clavie.b@gmail.com>
+ *
+ * @final since Symfony 4.4
  */
 class XmlReaderCaster
 {
diff --git a/src/Symfony/Component/VarDumper/Caster/XmlResourceCaster.php b/src/Symfony/Component/VarDumper/Caster/XmlResourceCaster.php
index 117138c784..ce0317c0b5 100644
--- a/src/Symfony/Component/VarDumper/Caster/XmlResourceCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/XmlResourceCaster.php
@@ -17,6 +17,8 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  * Casts XML resources to array representation.
  *
  * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final since Symfony 4.4
  */
 class XmlResourceCaster
 {