diff --git a/src/Bundle/DependencyInjection/DunglasDoctrineJsonOdmExtension.php b/src/Bundle/DependencyInjection/DunglasDoctrineJsonOdmExtension.php
index 6af6586..ecf1298 100644
--- a/src/Bundle/DependencyInjection/DunglasDoctrineJsonOdmExtension.php
+++ b/src/Bundle/DependencyInjection/DunglasDoctrineJsonOdmExtension.php
@@ -13,7 +13,7 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
-use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
 use Symfony\Component\Serializer\Normalizer\BackedEnumNormalizer;
 use Symfony\Component\Serializer\Normalizer\UidNormalizer;
 
@@ -45,8 +45,8 @@ public function prepend(ContainerBuilder $container): void
      */
     public function load(array $configs, ContainerBuilder $container): void
     {
-        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
-        $loader->load('services.xml');
+        $loader = new PhpFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
+        $loader->load('services.php');
 
         if (PHP_VERSION_ID < 80100 || !class_exists(BackedEnumNormalizer::class)) {
             $container->removeDefinition('dunglas_doctrine_json_odm.normalizer.backed_enum');
diff --git a/src/Bundle/Resources/config/services.php b/src/Bundle/Resources/config/services.php
new file mode 100644
index 0000000..39c8f65
--- /dev/null
+++ b/src/Bundle/Resources/config/services.php
@@ -0,0 +1,63 @@
+<?php
+
+/*
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Symfony\Component\DependencyInjection\Loader\Configurator;
+
+use Dunglas\DoctrineJsonOdm\Serializer;
+use Dunglas\DoctrineJsonOdm\TypeMapper;
+use Symfony\Component\Serializer\Normalizer\ArrayDenormalizer;
+use Symfony\Component\Serializer\Normalizer\BackedEnumNormalizer;
+use Symfony\Component\Serializer\Normalizer\DateTimeNormalizer;
+use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
+use Symfony\Component\Serializer\Normalizer\UidNormalizer;
+
+return static function (ContainerConfigurator $container) {
+    $services = $container->services();
+
+    $services->set('dunglas_doctrine_json_odm.normalizer.backed_enum', BackedEnumNormalizer::class)
+        ->private();
+
+    $services->set('dunglas_doctrine_json_odm.normalizer.uid', UidNormalizer::class)
+        ->private();
+
+    $services->set('dunglas_doctrine_json_odm.normalizer.datetime', DateTimeNormalizer::class)
+        ->private();
+
+    $services->set('dunglas_doctrine_json_odm.normalizer.array', ArrayDenormalizer::class)
+        ->private();
+
+    $services->set('dunglas_doctrine_json_odm.type_mapper', TypeMapper::class)
+        ->private();
+
+    $services->set('dunglas_doctrine_json_odm.normalizer.object', ObjectNormalizer::class)
+        ->private()
+        ->args([
+            service('serializer.mapping.class_metadata_factory')->ignoreOnInvalid(),
+            null,
+            service('serializer.property_accessor'),
+            service('property_info')->ignoreOnInvalid(),
+            service('serializer.mapping.class_discriminator_resolver')->ignoreOnInvalid(),
+        ]);
+
+    $services->set('dunglas_doctrine_json_odm.serializer', Serializer::class)
+        ->public()
+        ->args([
+            [
+                service('dunglas_doctrine_json_odm.normalizer.backed_enum')->ignoreOnInvalid(),
+                service('dunglas_doctrine_json_odm.normalizer.uid')->ignoreOnInvalid(),
+                service('dunglas_doctrine_json_odm.normalizer.datetime'),
+                service('dunglas_doctrine_json_odm.normalizer.array'),
+                service('dunglas_doctrine_json_odm.normalizer.object'),
+            ],
+            [
+                service('serializer.encoder.json'),
+            ],
+            service('dunglas_doctrine_json_odm.type_mapper')->ignoreOnInvalid(),
+        ]);
+};
diff --git a/src/Bundle/Resources/config/services.xml b/src/Bundle/Resources/config/services.xml
deleted file mode 100644
index 5cbe5dc..0000000
--- a/src/Bundle/Resources/config/services.xml
+++ /dev/null
@@ -1,43 +0,0 @@
-<?xml version="1.0" ?>
-
-<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>
-
-        <service id="dunglas_doctrine_json_odm.normalizer.backed_enum" class="Symfony\Component\Serializer\Normalizer\BackedEnumNormalizer" public="false" />
-
-        <service id="dunglas_doctrine_json_odm.normalizer.uid" class="Symfony\Component\Serializer\Normalizer\UidNormalizer" public="false" />
-
-        <service id="dunglas_doctrine_json_odm.normalizer.datetime" class="Symfony\Component\Serializer\Normalizer\DateTimeNormalizer" public="false" />
-
-        <service id="dunglas_doctrine_json_odm.normalizer.array" class="Symfony\Component\Serializer\Normalizer\ArrayDenormalizer" public="false" />
-
-        <service id="dunglas_doctrine_json_odm.type_mapper" class="Dunglas\DoctrineJsonOdm\TypeMapper" public="false" />
-
-        <service id="dunglas_doctrine_json_odm.normalizer.object" class="Symfony\Component\Serializer\Normalizer\ObjectNormalizer" public="false">
-            <argument type="service" id="serializer.mapping.class_metadata_factory" on-invalid="ignore" />
-            <argument>null</argument><!-- name converter -->
-            <argument type="service" id="serializer.property_accessor" />
-            <argument type="service" id="property_info" on-invalid="ignore" />
-            <argument type="service" id="serializer.mapping.class_discriminator_resolver" on-invalid="ignore" />
-        </service>
-
-        <service id="dunglas_doctrine_json_odm.serializer" class="Dunglas\DoctrineJsonOdm\Serializer" public="true">
-            <argument type="collection">
-                <argument type="service" id="dunglas_doctrine_json_odm.normalizer.backed_enum" on-invalid="ignore" />
-                <argument type="service" id="dunglas_doctrine_json_odm.normalizer.uid" on-invalid="ignore" />
-                <argument type="service" id="dunglas_doctrine_json_odm.normalizer.datetime" />
-                <argument type="service" id="dunglas_doctrine_json_odm.normalizer.array" />
-                <argument type="service" id="dunglas_doctrine_json_odm.normalizer.object" />
-            </argument>
-
-            <argument type="collection">
-                <argument type="service" id="serializer.encoder.json" />
-            </argument>
-
-            <argument type="service" id="dunglas_doctrine_json_odm.type_mapper" on-invalid="ignore" />
-        </service>
-    </services>
-</container>