diff --git a/composer.json b/composer.json
index a949dde65daeb1f5696dacf0a64f715901da14bd..160557794fc7efd6d51f6f158a490bb2ccaeb6f2 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
         "php": ">=7.3",
         "ext-json": "*",
         "api-platform/core": "^2.6",
-        "dbp/relay-core-bundle": "dev-main as 0.1.32",
+        "dbp/relay-core-bundle": "dev-main as 0.1.34",
         "symfony/config": "^5.4",
         "symfony/framework-bundle": "^5.4",
         "symfony/security-bundle": "^5.4",
diff --git a/composer.lock b/composer.lock
index 989ddeb5e91a548971e580cde491ed3036ba6398..1da10001e0ca20716567d32ab866f9a90afa42d5 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d21fecd0dcd474297b30d7107433ac01",
+    "content-hash": "4900ef0af037a9733d0007e42ceb50b0",
     "packages": [
         {
             "name": "api-platform/core",
@@ -7473,16 +7473,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.5.6",
+            "version": "1.5.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "799dd8c2d2c9c704bb55d2078078cb970cf0f6d1"
+                "reference": "7fb7e2e1e9f3d59a26a413b2d3d5e47f0edb75ac"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/799dd8c2d2c9c704bb55d2078078cb970cf0f6d1",
-                "reference": "799dd8c2d2c9c704bb55d2078078cb970cf0f6d1",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/7fb7e2e1e9f3d59a26a413b2d3d5e47f0edb75ac",
+                "reference": "7fb7e2e1e9f3d59a26a413b2d3d5e47f0edb75ac",
                 "shasum": ""
             },
             "require": {
@@ -7508,7 +7508,7 @@
             "description": "PHPStan - PHP Static Analysis Tool",
             "support": {
                 "issues": "https://github.com/phpstan/phpstan/issues",
-                "source": "https://github.com/phpstan/phpstan/tree/1.5.6"
+                "source": "https://github.com/phpstan/phpstan/tree/1.5.7"
             },
             "funding": [
                 {
@@ -7528,20 +7528,20 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-04-15T11:13:37+00:00"
+            "time": "2022-04-20T12:20:27+00:00"
         },
         {
             "name": "phpstan/phpstan-phpunit",
-            "version": "1.1.0",
+            "version": "1.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan-phpunit.git",
-                "reference": "09133ce914f1388a8bb8c7f8573aaa3723cff52a"
+                "reference": "4a3c437c09075736285d1cabb5c75bf27ed0bc84"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan-phpunit/zipball/09133ce914f1388a8bb8c7f8573aaa3723cff52a",
-                "reference": "09133ce914f1388a8bb8c7f8573aaa3723cff52a",
+                "url": "https://api.github.com/repos/phpstan/phpstan-phpunit/zipball/4a3c437c09075736285d1cabb5c75bf27ed0bc84",
+                "reference": "4a3c437c09075736285d1cabb5c75bf27ed0bc84",
                 "shasum": ""
             },
             "require": {
@@ -7578,9 +7578,9 @@
             "description": "PHPUnit extensions and rules for PHPStan",
             "support": {
                 "issues": "https://github.com/phpstan/phpstan-phpunit/issues",
-                "source": "https://github.com/phpstan/phpstan-phpunit/tree/1.1.0"
+                "source": "https://github.com/phpstan/phpstan-phpunit/tree/1.1.1"
             },
-            "time": "2022-03-28T09:20:49+00:00"
+            "time": "2022-04-20T15:24:25+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -10031,8 +10031,8 @@
         {
             "package": "dbp/relay-core-bundle",
             "version": "dev-main",
-            "alias": "0.1.32",
-            "alias_normalized": "0.1.32.0"
+            "alias": "0.1.34",
+            "alias_normalized": "0.1.34.0"
         }
     ],
     "minimum-stability": "stable",
diff --git a/src/DependencyInjection/DbpRelayBaseCourseExtension.php b/src/DependencyInjection/DbpRelayBaseCourseExtension.php
index 38c2e02e3fe5e2a963b495ed5971f20d5222bb6a..34a57f0f20af84370d9d124e2605c850ed3b3964 100644
--- a/src/DependencyInjection/DbpRelayBaseCourseExtension.php
+++ b/src/DependencyInjection/DbpRelayBaseCourseExtension.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Dbp\Relay\BaseCourseBundle\DependencyInjection;
 
+use Dbp\Relay\CoreBundle\Extension\ExtensionTrait;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
@@ -11,16 +12,14 @@ use Symfony\Component\HttpKernel\DependencyInjection\ConfigurableExtension;
 
 class DbpRelayBaseCourseExtension extends ConfigurableExtension
 {
+    use ExtensionTrait;
+
     public function loadInternal(array $mergedConfig, ContainerBuilder $container)
     {
-        $this->extendArrayParameter(
-            $container, 'api_platform.resource_class_directories', [__DIR__.'/../Entity']);
+        $this->addResourceClassDirectory($container, __DIR__.'/../Entity');
 
-        $this->extendArrayParameter(
-            $container, 'dbp_api.paths_to_hide', [
-            '/course_attendees',
-            '/course_attendees/{identifier}',
-        ]);
+        $this->addPathToHide($container, '/course_attendees');
+        $this->addPathToHide($container, '/course_attendees/{identifier}');
 
         $loader = new YamlFileLoader(
             $container,
@@ -28,14 +27,4 @@ class DbpRelayBaseCourseExtension extends ConfigurableExtension
         );
         $loader->load('services.yaml');
     }
-
-    private function extendArrayParameter(ContainerBuilder $container, string $parameter, array $values)
-    {
-        if (!$container->hasParameter($parameter)) {
-            $container->setParameter($parameter, []);
-        }
-        $oldValues = $container->getParameter($parameter);
-        assert(is_array($oldValues));
-        $container->setParameter($parameter, array_merge($oldValues, $values));
-    }
 }