diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 711b631d54590..3ea0b1b93f731 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -1812,6 +1812,8 @@ private function dumpValue($value, bool $interpolate = true): string
 
                 return $code;
             }
+        } elseif ($value instanceof \UnitEnum) {
+            return sprintf('\%s::%s', \get_class($value), $value->name);
         } elseif (\is_object($value) || \is_resource($value)) {
             throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
         }
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
index 02a501bd2c34c..8017fc579aaa2 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
@@ -313,6 +313,9 @@ private function convertParameters(array $parameters, string $type, \DOMElement
                 $element->setAttribute('type', 'binary');
                 $text = $this->document->createTextNode(self::phpToXml(base64_encode($value)));
                 $element->appendChild($text);
+            } elseif ($value instanceof \UnitEnum) {
+                $element->setAttribute('type', 'constant');
+                $element->appendChild($this->document->createTextNode(self::phpToXml($value)));
             } else {
                 if (\in_array($value, ['null', 'true', 'false'], true)) {
                     $element->setAttribute('type', 'string');
@@ -366,6 +369,8 @@ public static function phpToXml($value): string
                 return 'false';
             case $value instanceof Parameter:
                 return '%'.$value.'%';
+            case $value instanceof \UnitEnum:
+                return sprintf('%s::%s', \get_class($value), $value->name);
             case \is_object($value) || \is_resource($value):
                 throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
             default:
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
index c055a686128c2..5dce997d9df9d 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
@@ -286,6 +286,8 @@ private function dumpValue($value)
             return $this->getExpressionCall((string) $value);
         } elseif ($value instanceof Definition) {
             return new TaggedValue('service', (new Parser())->parse("_:\n".$this->addService('_', $value), Yaml::PARSE_CUSTOM_TAGS)['_']['_']);
+        } elseif ($value instanceof \UnitEnum) {
+            return new TaggedValue('php/const', sprintf('%s::%s', \get_class($value), $value->name));
         } elseif (\is_object($value) || \is_resource($value)) {
             throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
         }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index b46fbf937b910..3468e35a944c1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -40,6 +40,8 @@
 use Symfony\Component\DependencyInjection\Tests\Compiler\Foo;
 use Symfony\Component\DependencyInjection\Tests\Compiler\Wither;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\ScalarFactory;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\TestDefinition1;
@@ -1208,6 +1210,29 @@ public function testDumpHandlesObjectClassNames()
         $this->assertInstanceOf(\stdClass::class, $container->get('bar'));
     }
 
+    /**
+     * @requires PHP 8.1
+     */
+    public function testDumpHandlesEnumeration()
+    {
+        $container = new ContainerBuilder();
+        $container
+            ->register('foo', FooClassWithEnumAttribute::class)
+            ->setPublic(true)
+            ->addArgument(FooUnitEnum::BAR);
+
+        $container->compile();
+
+        $dumper = new PhpDumper($container);
+        eval('?>'.$dumper->dump([
+            'class' => 'Symfony_DI_PhpDumper_Test_Enumeration',
+        ]));
+
+        $container = new \Symfony_DI_PhpDumper_Test_Enumeration();
+
+        $this->assertSame(FooUnitEnum::BAR, $container->get('foo')->getBar());
+    }
+
     public function testUninitializedSyntheticReference()
     {
         $container = new ContainerBuilder();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
index dda18a306207e..18caa150f278e 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
@@ -21,6 +21,8 @@
 use Symfony\Component\DependencyInjection\Dumper\XmlDumper;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum;
 
 class XmlDumperTest extends TestCase
 {
@@ -249,4 +251,21 @@ public function testDumpAbstractServices()
 
         $this->assertEquals(file_get_contents(self::$fixturesPath.'/xml/services_abstract.xml'), $dumper->dump());
     }
+
+    /**
+     * @requires PHP 8.1
+     */
+    public function testDumpHandlesEnumeration()
+    {
+        $container = new ContainerBuilder();
+        $container
+            ->register(FooClassWithEnumAttribute::class, FooClassWithEnumAttribute::class)
+            ->setPublic(true)
+            ->addArgument(FooUnitEnum::BAR);
+
+        $container->compile();
+        $dumper = new XmlDumper($container);
+
+        $this->assertEquals(file_get_contents(self::$fixturesPath.'/xml/services_with_enumeration.xml'), $dumper->dump());
+    }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
index b359f668d7758..9a973afe69df7 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
@@ -22,6 +22,8 @@
 use Symfony\Component\DependencyInjection\Dumper\YamlDumper;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum;
 use Symfony\Component\Yaml\Parser;
 use Symfony\Component\Yaml\Yaml;
 
@@ -129,6 +131,23 @@ public function testServiceClosure()
         $this->assertStringEqualsFile(self::$fixturesPath.'/yaml/services_with_service_closure.yml', $dumper->dump());
     }
 
+    /**
+     * @requires PHP 8.1
+     */
+    public function testDumpHandlesEnumeration()
+    {
+        $container = new ContainerBuilder();
+        $container
+            ->register(FooClassWithEnumAttribute::class, FooClassWithEnumAttribute::class)
+            ->setPublic(true)
+            ->addArgument(FooUnitEnum::BAR);
+
+        $container->compile();
+        $dumper = new YamlDumper($container);
+
+        $this->assertEquals(file_get_contents(self::$fixturesPath.'/yaml/services_with_enumeration.yml'), $dumper->dump());
+    }
+
     private function assertEqualYamlStructure(string $expected, string $yaml, string $message = '')
     {
         $parser = new Parser();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/FooClassWithEnumAttribute.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/FooClassWithEnumAttribute.php
new file mode 100644
index 0000000000000..3b2235efdd76b
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/FooClassWithEnumAttribute.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures;
+
+class FooClassWithEnumAttribute
+{
+    private FooUnitEnum $bar;
+
+    public function __construct(FooUnitEnum $bar)
+    {
+        $this->bar = $bar;
+    }
+
+    public function getBar(): FooUnitEnum
+    {
+        return $this->bar;
+    }
+}
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/FooUnitEnum.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/FooUnitEnum.php
new file mode 100644
index 0000000000000..d51cf9c995e26
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/FooUnitEnum.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures;
+
+enum FooUnitEnum
+{
+    case BAR;
+}
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services_with_enumeration.xml b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services_with_enumeration.xml
new file mode 100644
index 0000000000000..30e80f0053d2d
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services_with_enumeration.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<container xmlns="http://symfony.com/schema/dic/services" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd">
+  <services>
+    <service id="service_container" class="Symfony\Component\DependencyInjection\ContainerInterface" public="true" synthetic="true"/>
+    <service id="Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute" class="Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute" public="true">
+      <argument type="constant">Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum::BAR</argument>
+    </service>
+  </services>
+</container>
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services_with_invalid_enumeration.xml b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services_with_invalid_enumeration.xml
new file mode 100644
index 0000000000000..8864e6d892857
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/services_with_invalid_enumeration.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<container xmlns="http://symfony.com/schema/dic/services" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/dic/services https://symfony.com/schema/dic/services/services-1.0.xsd">
+  <services>
+    <service id="service_container" class="Symfony\Component\DependencyInjection\ContainerInterface" public="true" synthetic="true"/>
+    <service id="Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute" class="Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute" public="true">
+      <argument type="constant">Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum::BAZ</argument>
+    </service>
+  </services>
+</container>
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services_with_enumeration.yml b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services_with_enumeration.yml
new file mode 100644
index 0000000000000..46bf505d44b80
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services_with_enumeration.yml
@@ -0,0 +1,10 @@
+
+services:
+    service_container:
+        class: Symfony\Component\DependencyInjection\ContainerInterface
+        public: true
+        synthetic: true
+    Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute:
+        class: Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute
+        public: true
+        arguments: [!php/const 'Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum::BAR']
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services_with_invalid_enumeration.yml b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services_with_invalid_enumeration.yml
new file mode 100644
index 0000000000000..b9f74e0f468ab
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/yaml/services_with_invalid_enumeration.yml
@@ -0,0 +1,10 @@
+
+services:
+    service_container:
+        class: Symfony\Component\DependencyInjection\ContainerInterface
+        public: true
+        synthetic: true
+    Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute:
+        class: Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute
+        public: true
+        arguments: [!php/const 'Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum::BAZ']
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
index 80d3393010602..ef00b2f721608 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
@@ -37,6 +37,8 @@
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Bar;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\BarInterface;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\CaseSensitiveClass;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\NamedArgumentsDummy;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype;
 use Symfony\Component\ExpressionLanguage\Expression;
@@ -827,6 +829,32 @@ public function testInstanceof()
         $this->assertSame(['foo' => [[]], 'bar' => [[]]], $definition->getTags());
     }
 
+    /**
+     * @requires PHP 8.1
+     */
+    public function testEnumeration()
+    {
+        $container = new ContainerBuilder();
+        $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
+        $loader->load('services_with_enumeration.xml');
+        $container->compile();
+
+        $definition = $container->getDefinition(FooClassWithEnumAttribute::class);
+        $this->assertSame([FooUnitEnum::BAR], $definition->getArguments());
+    }
+
+    /**
+     * @requires PHP 8.1
+     */
+    public function testInvalidEnumeration()
+    {
+        $container = new ContainerBuilder();
+        $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
+
+        $this->expectException(\Error::class);
+        $loader->load('services_with_invalid_enumeration.xml');
+    }
+
     public function testInstanceOfAndChildDefinitionNotAllowed()
     {
         $this->expectException(InvalidArgumentException::class);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
index f367bf3452384..910e7b2a243e5 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
@@ -37,6 +37,8 @@
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Bar;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\BarInterface;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\CaseSensitiveClass;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooClassWithEnumAttribute;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\NamedArgumentsDummy;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype;
 use Symfony\Component\ExpressionLanguage\Expression;
@@ -909,6 +911,33 @@ public function testDefaultValueOfTagged()
         $this->assertNull($iteratorArgument->getIndexAttribute());
     }
 
+    /**
+     * @requires PHP 8.1
+     */
+    public function testEnumeration()
+    {
+        $container = new ContainerBuilder();
+        $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
+        $loader->load('services_with_enumeration.yml');
+        $container->compile();
+
+        $definition = $container->getDefinition(FooClassWithEnumAttribute::class);
+        $this->assertSame([FooUnitEnum::BAR], $definition->getArguments());
+    }
+
+    /**
+     * @requires PHP 8.1
+     */
+    public function testInvalidEnumeration()
+    {
+        $container = new ContainerBuilder();
+        $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
+
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('The constant "Symfony\Component\DependencyInjection\Tests\Fixtures\FooUnitEnum::BAZ" is not defined');
+        $loader->load('services_with_invalid_enumeration.yml');
+    }
+
     public function testReturnsClone()
     {
         $container = new ContainerBuilder();
diff --git a/src/Symfony/Component/Yaml/Inline.php b/src/Symfony/Component/Yaml/Inline.php
index a317bb0438e5f..10ed14fe5116b 100644
--- a/src/Symfony/Component/Yaml/Inline.php
+++ b/src/Symfony/Component/Yaml/Inline.php
@@ -127,6 +127,8 @@ public static function dump($value, int $flags = 0): string
                 return self::dumpNull($flags);
             case $value instanceof \DateTimeInterface:
                 return $value->format('c');
+            case $value instanceof \UnitEnum:
+                return sprintf('!php/const %s::%s', \get_class($value), $value->name);
             case \is_object($value):
                 if ($value instanceof TaggedValue) {
                     return '!'.$value->getTag().' '.self::dump($value->getValue(), $flags);
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/FooUnitEnum.php b/src/Symfony/Component/Yaml/Tests/Fixtures/FooUnitEnum.php
new file mode 100644
index 0000000000000..59092e27e8728
--- /dev/null
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/FooUnitEnum.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Symfony\Component\Yaml\Tests\Fixtures;
+
+enum FooUnitEnum
+{
+    case BAR;
+}
diff --git a/src/Symfony/Component/Yaml/Tests/InlineTest.php b/src/Symfony/Component/Yaml/Tests/InlineTest.php
index b4b8520642628..0b76d91e4c92d 100644
--- a/src/Symfony/Component/Yaml/Tests/InlineTest.php
+++ b/src/Symfony/Component/Yaml/Tests/InlineTest.php
@@ -15,6 +15,7 @@
 use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Inline;
 use Symfony\Component\Yaml\Tag\TaggedValue;
+use Symfony\Component\Yaml\Tests\Fixtures\FooUnitEnum;
 use Symfony\Component\Yaml\Yaml;
 
 class InlineTest extends TestCase
@@ -577,6 +578,14 @@ public function testDumpDateTime($dateTime, $expected)
         $this->assertSame($expected, Inline::dump($dateTime));
     }
 
+    /**
+     * @requires PHP 8.1
+     */
+    public function testDumpUnitEnum()
+    {
+        $this->assertSame("!php/const Symfony\Component\Yaml\Tests\Fixtures\FooUnitEnum::BAR", Inline::dump(FooUnitEnum::BAR));
+    }
+
     public function getDateTimeDumpTests()
     {
         $tests = [];