Minimum version of Symfony is ^5.1.

composer.json

@@ -18,12 +18,13 @@
         "ext-simplexml": "*",
         "ecphp/cas-bundle": "^2",
         "ecphp/ecas": "^2",
-        "symfony/framework-bundle": "^5"
+        "symfony/framework-bundle": "^5.1"
     },
     "require-dev": {
         "drupol/php-conventions": "^1.7.1",
         "friends-of-phpspec/phpspec-code-coverage": "^4.3.2",
         "infection/infection": "^0.15.3 || ^0.16.3",
+        "infection/phpspec-adapter": "^0.1.1",
         "phpspec/phpspec": "^6.2"
     },
     "autoload": {

src/DependencyInjection/EuLoginExtension.php

@@ -6,7 +6,7 @@
 
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 /**
@@ -21,7 +21,7 @@ class EuLoginExtension extends Extension
     public function load(array $configs, ContainerBuilder $container): void
     {
         // Load EU Login services.
-        $loader = new YamlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
-        $loader->load('services.yaml');
+        $loader = new PhpFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
+        $loader->load('services.php');
     }
 }

src/Resources/config/services.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Symfony\Component\DependencyInjection\Loader\Configurator;
+
+use EcPhp\Ecas\Ecas;
+use EcPhp\Ecas\EcasProperties;
+use EcPhp\EuLoginBundle\Security\Core\User\EuLoginUserProvider;
+
+return static function (ContainerConfigurator $container) {
+    $container
+        ->services()
+        ->set('eulogin.userprovider', EuLoginUserProvider::class);
+
+    $container
+        ->services()
+        ->set('ecas.configuration', EcasProperties::class)
+        ->decorate('cas.configuration')
+        ->args([
+            service('ecas.configuration.inner'),
+            service('request_stack'),
+        ]);
+
+    $container
+        ->services()
+        ->set('ecas', Ecas::class)
+        ->decorate('cas')
+        ->args([
+            service('cas.inner'),
+            service('nyholm.psr7.psr17_factory'),
+        ]);
+};