diff --git a/appinfo/app.php b/appinfo/app.php
deleted file mode 100644
index 7c48ca1..0000000
--- a/appinfo/app.php
+++ /dev/null
@@ -1,10 +0,0 @@
-<?php
-
-use OCA\SideMenu\AppInfo\Application;
-
-$app = new Application();
-
-if ($app->isEnabled()) {
-    $app->registerAssets();
-    $app->registerServices();
-}
diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 0558e9a..f7f5e7e 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -9,6 +9,9 @@ use OCA\SideMenu\Service\AppRepository;
 use OCA\SideMenu\Service\CategoryRepository;
 use OCA\SideMenu\Service\ConfigProxy;
 use OCP\AppFramework\App;
+use OCP\AppFramework\Bootstrap\IBootContext;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
 use OCP\IUserSession;
 use OCP\Util;
 use Psr\Container\ContainerInterface;
@@ -18,7 +21,7 @@ use Psr\Container\ContainerInterface;
  *
  * @author Simon Vieille <simon@deblan.fr>
  */
-class Application extends App
+class Application extends App implements IBootstrap
 {
     public const APP_ID = 'side_menu';
 
@@ -44,16 +47,9 @@ class Application extends App
     public function __construct(array $urlParams = [])
     {
         parent::__construct(self::APP_ID, $urlParams);
-
-        $this->config = OC::$server->getConfig();
-        $this->cspnm = OC::$server->getContentSecurityPolicyNonceManager();
-        $this->user = OC::$server[IUserSession::class]->getUser();
     }
 
-    /**
-     * Checks if this app is enabled.
-     */
-    public function isEnabled(): bool
+    protected function isEnabled(): bool
     {
         $enabled = true;
         $isForced = (bool) $this->config->getAppValue(self::APP_ID, 'force', '0');
@@ -74,64 +70,65 @@ class Application extends App
         return $enabled;
     }
 
-    /**
-     * Registes services.
-     */
-    public function registerServices()
-    {
-        $container = $this->getContainer();
-
-        $container->registerService('AppRepository', function (ContainerInterface $c) {
-            return new AppRepository();
-        });
-
-        $container->registerService('CategoryRepository', function (ContainerInterface $c) {
-            return new CategoryRepository();
-        });
-
-        $container->registerService('ConfigProxy', function (ContainerInterface $c) {
-            return new ConfigProxy();
-        });
-    }
-
-    /**
-     * Registers assets.
-     */
-    public function registerAssets()
+    protected function addAssets()
     {
         Util::addScript(self::APP_ID, 'sideMenu');
         Util::addStyle(self::APP_ID, 'sideMenu');
 
-        $stylesheet = OC::$server->getURLGenerator()->linkToRoute(
-            'side_menu.Css.stylesheet',
-            [
-                'v' => $this->config->getAppValue(self::APP_ID, 'cache', '0'),
-            ]
-        );
-
-        $script = OC::$server->getURLGenerator()->linkToRoute(
-            'side_menu.Js.script',
-            [
-                'v' => $this->config->getAppValue(self::APP_ID, 'cache', '0'),
-            ]
-        );
-
-        Util::addHeader(
-            'link',
-            [
-                'href' => $stylesheet,
-                'rel' => 'stylesheet',
+        $assets = [
+            'stylesheet' => [
+                'route' => 'side_menu.Css.stylesheet',
+                'type' => 'link',
+                'route_attr' => 'href',
+                'attr' => [
+                    'rel' => 'stylesheet',
+                ],
             ],
-            ''
-        );
-
-        Util::addHeader(
-            'script',
-            [
-                'src' => $script,
-                'nonce' => $this->cspnm->getNonce(),
+            'script' => [
+                'route' => 'side_menu.Js.script',
+                'type' => 'script',
+                'route_attr' => 'src',
+                'attr' => [
+                    'nonce' => $this->cspnm->getNonce(),
+                ],
             ],
-            ''
-        );
+        ];
+
+        $cache = $this->config->getAppValue(self::APP_ID, 'cache', '0');
+
+        foreach ($assets as $key => $value) {
+            $route = OC::$server->getURLGenerator()->linkToRoute($value['route'], ['v' => $cache]);
+            $value['attr'][$value['route_attr']] = $route;
+
+            Util::addHeader($value['type'], $value['attr'], '');
+        }
+    }
+
+    public function register(IRegistrationContext $context): void
+    {
+        $context->registerService('AppRepository', function (ContainerInterface $c) {
+            return new AppRepository();
+        });
+
+        $context->registerService('CategoryRepository', function (ContainerInterface $c) {
+            return new CategoryRepository();
+        });
+
+        $context->registerService('ConfigProxy', function (ContainerInterface $c) {
+            return new ConfigProxy();
+        });
+    }
+
+    public function boot(IBootContext $context): void
+    {
+        $this->config = OC::$server->getConfig();
+        $this->cspnm = OC::$server->getContentSecurityPolicyNonceManager();
+        $this->user = OC::$server[IUserSession::class]->getUser();
+
+        if (!$this->isEnabled()) {
+            return;
+        }
+
+        $this->addAssets();
     }
 }