diff --git a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
index 9b9fdecee5bb0..ab62dc0b027ea 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
+++ b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
@@ -12,6 +12,7 @@ CHANGELOG
    PHP's native `serialize()` and `unserialize()` functions. To use the
    original serialization method, set the `framework.messenger.serializer.id`
    config option to `messenger.transport.symfony_serializer`.
+ * Added information about deprecated aliases in `debug:autowiring` 
 
 4.2.0
 -----
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/DebugAutowiringCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/DebugAutowiringCommand.php
index a1097592ee784..97493eb28db24 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/DebugAutowiringCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/DebugAutowiringCommand.php
@@ -104,7 +104,12 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $serviceLine = sprintf('<fg=yellow>%s</>', $serviceId);
             if ($builder->hasAlias($serviceId)) {
                 $hasAlias[$serviceId] = true;
-                $serviceLine .= ' <fg=cyan>('.$builder->getAlias($serviceId).')</>';
+                $serviceAlias = $builder->getAlias($serviceId);
+                $serviceLine .= ' <fg=cyan>('.$serviceAlias.')</>';
+
+                if ($serviceAlias->isDeprecated()) {
+                    $serviceLine .= ' - <fg=magenta>deprecated</>';
+                }
             } elseif (!$all) {
                 continue;
             }
diff --git a/src/Symfony/Bundle/FrameworkBundle/composer.json b/src/Symfony/Bundle/FrameworkBundle/composer.json
index de270782d9a07..273788a925bf0 100644
--- a/src/Symfony/Bundle/FrameworkBundle/composer.json
+++ b/src/Symfony/Bundle/FrameworkBundle/composer.json
@@ -21,7 +21,7 @@
         "symfony/cache": "~4.3",
         "symfony/config": "~4.2",
         "symfony/contracts": "^1.0.2",
-        "symfony/dependency-injection": "^4.2",
+        "symfony/dependency-injection": "^4.3",
         "symfony/event-dispatcher": "^4.1",
         "symfony/http-foundation": "^4.3",
         "symfony/http-kernel": "^4.2",
diff --git a/src/Symfony/Component/DependencyInjection/CHANGELOG.md b/src/Symfony/Component/DependencyInjection/CHANGELOG.md
index 7afa4a21b89a0..33d5a5f4220af 100644
--- a/src/Symfony/Component/DependencyInjection/CHANGELOG.md
+++ b/src/Symfony/Component/DependencyInjection/CHANGELOG.md
@@ -6,6 +6,7 @@ CHANGELOG
 
  * added `%env(trim:...)%` processor to trim a string value
  * added `%env(default:...)%` processor to fallback to a default value
+ * added support for deprecating aliases
 
 4.2.0
 -----
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
index 625f126621907..704df2af3965e 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
@@ -227,6 +227,14 @@ private function addServiceAlias($alias, Alias $id, \DOMElement $parent)
         if (!$id->isPrivate()) {
             $service->setAttribute('public', $id->isPublic() ? 'true' : 'false');
         }
+
+        if ($id->isDeprecated()) {
+            $deprecated = $this->document->createElement('deprecated');
+            $deprecated->appendChild($this->document->createTextNode($id->getDeprecationMessage('%alias_id%')));
+
+            $service->appendChild($deprecated);
+        }
+
         $parent->appendChild($service);
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
index 2c07ebddad141..5b9e747315abd 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
@@ -155,11 +155,13 @@ private function addService(string $id, Definition $definition): string
 
     private function addServiceAlias(string $alias, Alias $id): string
     {
+        $deprecated = $id->isDeprecated() ? sprintf("        deprecated: %s\n", $id->getDeprecationMessage('%alias_id%')) : '';
+
         if ($id->isPrivate()) {
-            return sprintf("    %s: '@%s'\n", $alias, $id);
+            return sprintf("    %s: '@%s'\n%s", $alias, $id, $deprecated);
         }
 
-        return sprintf("    %s:\n        alias: %s\n        public: %s\n", $alias, $id, $id->isPublic() ? 'true' : 'false');
+        return sprintf("    %s:\n        alias: %s\n        public: %s\n%s", $alias, $id, $id->isPublic() ? 'true' : 'false', $deprecated);
     }
 
     private function addServices(): string
diff --git a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
index d2be52f652dbe..e14d38d49d7f1 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
@@ -350,7 +350,7 @@ private function parseDefinition($id, $service, $file, array $defaults)
 
             foreach ($service as $key => $value) {
                 if (!\in_array($key, ['alias', 'public', 'deprecated'])) {
-                    throw new InvalidArgumentException(sprintf('The configuration key "%s" is unsupported for the service "%s" which is defined as an alias in "%s". Allowed configuration keys for service aliases are "alias" and "public".', $key, $id, $file));
+                    throw new InvalidArgumentException(sprintf('The configuration key "%s" is unsupported for the service "%s" which is defined as an alias in "%s". Allowed configuration keys for service aliases are "alias", "public" and "deprecated".', $key, $id, $file));
                 }
 
                 if ('deprecated' === $key) {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/AliasTest.php b/src/Symfony/Component/DependencyInjection/Tests/AliasTest.php
index f9a9bb76fc846..f382450afc693 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/AliasTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/AliasTest.php
@@ -79,13 +79,10 @@ public function testCanOverrideDeprecation()
     {
         $alias = new Alias('foo', false);
         $alias->setDeprecated();
+        $this->assertTrue($alias->isDeprecated());
 
-        $initial = $alias->isDeprecated();
         $alias->setDeprecated(false);
-        $final = $alias->isDeprecated();
-
-        $this->assertTrue($initial);
-        $this->assertFalse($final);
+        $this->assertFalse($alias->isDeprecated());
     }
 
     /**
@@ -105,6 +102,7 @@ public function invalidDeprecationMessageProvider()
             "With \ns" => ["invalid \n message %alias_id%"],
             'With */s' => ['invalid */ message %alias_id%'],
             'message not containing required %alias_id% variable' => ['this is deprecated'],
+            'template not containing required %alias_id% variable' => [true],
         ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php b/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
index aeef76122f030..3462726943037 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
@@ -164,7 +164,9 @@ public function testSetIsDeprecated()
         $this->assertFalse($def->isDeprecated(), '->isDeprecated() returns false by default');
         $this->assertSame($def, $def->setDeprecated(true), '->setDeprecated() implements a fluent interface');
         $this->assertTrue($def->isDeprecated(), '->isDeprecated() returns true if the instance should not be used anymore.');
-        $this->assertSame('The "deprecated_service" service is deprecated. You should stop using it, as it will be removed in the future.', $def->getDeprecationMessage('deprecated_service'), '->getDeprecationMessage() should return a formatted message template');
+
+        $def->setDeprecated(true, '%service_id%');
+        $this->assertSame('deprecated_service', $def->getDeprecationMessage('deprecated_service'), '->getDeprecationMessage() should return given formatted message template');
     }
 
     /**
@@ -184,6 +186,7 @@ public function invalidDeprecationMessageProvider()
             "With \ns" => ["invalid \n message %service_id%"],
             'With */s' => ['invalid */ message %service_id%'],
             'message not containing require %service_id% variable' => ['this is deprecated'],
+            'template not containing require %service_id% variable' => [true],
         ];
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/deprecated_alias_definitions.xml b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/deprecated_alias_definitions.xml
index b122f92bf1f0a..69b9bbb15ea70 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/deprecated_alias_definitions.xml
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/xml/deprecated_alias_definitions.xml
@@ -4,7 +4,7 @@
     <service id="foo" class="Foo">
     </service>
     <service id="alias_for_foo" alias="foo">
-      <deprecated />
+      <deprecated>The "%alias_id%" service alias is deprecated. You should stop using it, as it will be removed in the future.</deprecated>
     </service>
     <service id="alias_for_foobar" alias="foobar">
       <deprecated>The "%alias_id%" service alias is deprecated.</deprecated>