diff --git a/README.md b/README.md
index d5679ad..b51ed5d 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,8 @@ return [
 Create Symfony Health Check Bundle Config:
 ----------------------------------
 
+> **Note:** XML configuration is no longer supported. Please use YAML or PHP configuration format in your project.
+
 Configurating health check - all available you can see [here](https://github.com/MacPaw/symfony-health-check-bundle/tree/master/src/Check).
 
 ```yaml
@@ -74,7 +76,7 @@ Create Symfony Health Check Bundle Routing Config:
 
 ```yaml
 health_check:
-    resource: '@SymfonyHealthCheckBundle/Resources/config/routes.xml'
+    resource: '@SymfonyHealthCheckBundle/Resources/config/routes.php'
 ```
 
 Step 3: Configuration
diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
deleted file mode 100644
index 16cab88..0000000
--- a/phpstan-baseline.neon
+++ /dev/null
@@ -1,10 +0,0 @@
-parameters:
-	ignoreErrors:
-	    -
-	        message: '#Call to an undefined method Symfony\\Component\\Config\\Definition\\Builder\\NodeParentInterface::variableNode\(\).#'
-	        count: 1
-	        path: ./src/DependencyInjection
-	    -
-	        message: '#Call to an undefined method Symfony\\Component\\Config\\Definition\\Builder\\TreeBuilder::root\(\).#'
-	        count: 1
-	        path: ./src/DependencyInjection
diff --git a/phpstan.neon b/phpstan.neon
index bc0f2c3..91e6453 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,6 +1,3 @@
-includes:
-    - phpstan-baseline.neon
-
 parameters:
     level: 5
     paths:
diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index e97982d..5418520 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -15,9 +15,10 @@ public function getConfigTreeBuilder(): TreeBuilder
     {
         $treeBuilder = new TreeBuilder('symfony_health_check');
 
-        /** @var ArrayNodeDefinition $root */
+        /** @var ArrayNodeDefinition<TreeBuilder> $root */
         $root = method_exists(TreeBuilder::class, 'getRootNode')
             ? $treeBuilder->getRootNode()
+            // @phpstan-ignore-next-line - BC layer for Symfony <4.2
             : $treeBuilder->root('symfony_health_check');
 
         $root
diff --git a/src/DependencyInjection/SymfonyHealthCheckExtension.php b/src/DependencyInjection/SymfonyHealthCheckExtension.php
index 43657af..82c4796 100644
--- a/src/DependencyInjection/SymfonyHealthCheckExtension.php
+++ b/src/DependencyInjection/SymfonyHealthCheckExtension.php
@@ -9,7 +9,7 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Extension\Extension;
-use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
 use SymfonyHealthCheckBundle\Controller\HealthController;
 use SymfonyHealthCheckBundle\Controller\PingController;
 
@@ -20,8 +20,8 @@ public function load(array $configs, ContainerBuilder $container): void
         $configuration = new Configuration();
         $config = $this->processConfiguration($configuration, $configs);
 
-        $loader = new XmlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
-        $loader->load('controller.xml');
+        $loader = new PhpFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
+        $loader->load('controller.php');
 
         $this->loadHealthChecks($config, $loader, $container);
 
@@ -31,10 +31,10 @@ public function load(array $configs, ContainerBuilder $container): void
 
     private function loadHealthChecks(
         array $config,
-        XmlFileLoader $loader,
+        PhpFileLoader $loader,
         ContainerBuilder $container
     ): void {
-        $loader->load('health_checks.xml');
+        $loader->load('health_checks.php');
 
         $healthCheckCollection = $container->findDefinition(HealthController::class);
 
diff --git a/src/Resources/config/controller.php b/src/Resources/config/controller.php
new file mode 100644
index 0000000..61affb1
--- /dev/null
+++ b/src/Resources/config/controller.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symfony\Component\DependencyInjection\Loader\Configurator;
+
+use SymfonyHealthCheckBundle\Controller\HealthController;
+use SymfonyHealthCheckBundle\Controller\PingController;
+
+return static function (ContainerConfigurator $container) {
+    $services = $container->services();
+    $parameters = $container->parameters();
+
+    $services->defaults()
+        ->autowire()
+        ->autoconfigure();
+
+    $services->set(HealthController::class, HealthController::class)
+        ->public()
+        ->tag('container.service_subscriber');
+
+    $services->set(PingController::class, PingController::class)
+        ->public()
+        ->tag('container.service_subscriber');
+};
diff --git a/src/Resources/config/controller.xml b/src/Resources/config/controller.xml
deleted file mode 100644
index 6607053..0000000
--- a/src/Resources/config/controller.xml
+++ /dev/null
@@ -1,16 +0,0 @@
-<?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
-    http://symfony.com/schema/dic/services/services-1.0.xsd">
-    <services>
-        <defaults autowire="true" autoconfigure="true" />
-
-        <service public="true" id="SymfonyHealthCheckBundle\Controller\HealthController" class="SymfonyHealthCheckBundle\Controller\HealthController">
-            <tag name="container.service_subscriber" />
-        </service>
-        <service public="true" id="SymfonyHealthCheckBundle\Controller\PingController" class="SymfonyHealthCheckBundle\Controller\PingController">
-            <tag name="container.service_subscriber" />
-        </service>
-    </services>
-</container>
diff --git a/src/Resources/config/health_checks.php b/src/Resources/config/health_checks.php
new file mode 100644
index 0000000..48a418d
--- /dev/null
+++ b/src/Resources/config/health_checks.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symfony\Component\DependencyInjection\Loader\Configurator;
+
+use SymfonyHealthCheckBundle\Adapter\RedisAdapterWrapper;
+use SymfonyHealthCheckBundle\Check\DoctrineODMCheck;
+use SymfonyHealthCheckBundle\Check\DoctrineORMCheck;
+use SymfonyHealthCheckBundle\Check\EnvironmentCheck;
+use SymfonyHealthCheckBundle\Check\RedisCheck;
+use SymfonyHealthCheckBundle\Check\StatusUpCheck;
+
+return static function (ContainerConfigurator $container) {
+    $services = $container->services();
+    $parameters = $container->parameters();
+
+    $services->defaults()
+        ->public()
+        ->autowire()
+        ->autoconfigure();
+
+    $services->set('symfony_health_check.redis_adapter_wrapper', RedisAdapterWrapper::class)
+        ->private();
+
+    $services->set('symfony_health_check.doctrine_check', DoctrineORMCheck::class)
+        ->args([service('service_container')])
+        ->deprecate(
+            'macpaw/symfony-health-check-bundle',
+            '1.4.2',
+            'The "%service_id%" service alias is deprecated, use symfony_health_check.doctrine_orm_check instead'
+        );
+
+    $services->set('symfony_health_check.doctrine_orm_check', DoctrineORMCheck::class)
+        ->args([service('service_container')]);
+
+    $services->set('symfony_health_check.doctrine_odm_check', DoctrineODMCheck::class)
+        ->args([service('service_container')]);
+
+    $services->set('symfony_health_check.redis_check', RedisCheck::class)
+        ->args([service('symfony_health_check.redis_adapter_wrapper')]);
+
+    $services->set('symfony_health_check.environment_check', EnvironmentCheck::class)
+        ->args([service('service_container')]);
+
+    $services->set('symfony_health_check.status_up_check', StatusUpCheck::class);
+};
diff --git a/src/Resources/config/health_checks.xml b/src/Resources/config/health_checks.xml
deleted file mode 100644
index b950e8a..0000000
--- a/src/Resources/config/health_checks.xml
+++ /dev/null
@@ -1,28 +0,0 @@
-<?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
-    http://symfony.com/schema/dic/services/services-1.0.xsd">
-    <services>
-        <defaults autowire="true" autoconfigure="true" public="true" />
-        <service id="symfony_health_check.redis_adapter_wrapper" class="SymfonyHealthCheckBundle\Adapter\RedisAdapterWrapper" public="false"/>
-
-        <service id="symfony_health_check.doctrine_check" class="SymfonyHealthCheckBundle\Check\DoctrineORMCheck">
-            <argument type="service" id="service_container"/>
-            <deprecated package="macpaw/symfony-health-check-bundle" version="1.4.2">The "%service_id%" service alias is deprecated, use symfony_health_check.doctrine_orm_check instead</deprecated>
-        </service>
-        <service id="symfony_health_check.doctrine_orm_check" class="SymfonyHealthCheckBundle\Check\DoctrineORMCheck">
-            <argument type="service" id="service_container"/>
-        </service>
-        <service id="symfony_health_check.doctrine_odm_check" class="SymfonyHealthCheckBundle\Check\DoctrineODMCheck">
-            <argument type="service" id="service_container"/>
-        </service>
-        <service id="symfony_health_check.redis_check" class="SymfonyHealthCheckBundle\Check\RedisCheck">
-            <argument type="service" id="symfony_health_check.redis_adapter_wrapper"/>
-        </service>
-        <service id="symfony_health_check.environment_check" class="SymfonyHealthCheckBundle\Check\EnvironmentCheck">
-            <argument type="service" id="service_container"/>
-        </service>
-        <service id="symfony_health_check.status_up_check" class="SymfonyHealthCheckBundle\Check\StatusUpCheck"/>
-    </services>
-</container>
diff --git a/src/Resources/config/routes.php b/src/Resources/config/routes.php
new file mode 100644
index 0000000..444cc59
--- /dev/null
+++ b/src/Resources/config/routes.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symfony\Component\DependencyInjection\Loader\Configurator;
+
+use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;
+use SymfonyHealthCheckBundle\Controller\HealthController;
+use SymfonyHealthCheckBundle\Controller\PingController;
+
+return function (RoutingConfigurator $routes): void {
+    $routes->add('health', '/health')
+        ->controller([HealthController::class, 'check'])
+        ->methods(['GET']);
+
+    $routes->add('ping', '/ping')
+        ->controller([PingController::class, 'check'])
+        ->methods(['GET']);
+};
diff --git a/src/Resources/config/routes.xml b/src/Resources/config/routes.xml
deleted file mode 100644
index 2eede32..0000000
--- a/src/Resources/config/routes.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<routes xmlns="http://symfony.com/schema/routing"
-        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xsi:schemaLocation="http://symfony.com/schema/routing
-        https://symfony.com/schema/routing/routing-1.0.xsd">
-
-    <route
-        id="health"
-        path="/health"
-        controller="SymfonyHealthCheckBundle\Controller\HealthController::check"
-        methods="GET"
-    />
-    <route
-        id="ping"
-        path="/ping"
-        controller="SymfonyHealthCheckBundle\Controller\PingController::check"
-        methods="GET"
-    />
-</routes>
diff --git a/tests/config.yml b/tests/config.yml
index 71f2dbd..41a6b51 100644
--- a/tests/config.yml
+++ b/tests/config.yml
@@ -1,5 +1,5 @@
 framework:
     secret: secret
     router:
-        resource: "%kernel.project_dir%/Resources/config/routes.xml"
+        resource: "%kernel.project_dir%/Resources/config/routes.php"
     test: ~