diff --git a/apps/updatenotification/appinfo/app.php b/apps/updatenotification/appinfo/app.php
deleted file mode 100644
index a0608d0237..0000000000
--- a/apps/updatenotification/appinfo/app.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php
-/**
- * @copyright Copyright (c) 2018, Joas Schilling <coding@schilljs.com>
- *
- * @author Joas Schilling <coding@schilljs.com>
- * @author Lukas Reschke <lukas@statuscode.ch>
- * @author Robin Appelman <robin@icewind.nl>
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-use \OCA\UpdateNotification\AppInfo\Application;
-
-/** @var Application $app */
-$app = \OC::$server->query(Application::class);
-$app->register();
diff --git a/apps/updatenotification/lib/AppInfo/Application.php b/apps/updatenotification/lib/AppInfo/Application.php
index 9a0461d573..12d5cd9e62 100644
--- a/apps/updatenotification/lib/AppInfo/Application.php
+++ b/apps/updatenotification/lib/AppInfo/Application.php
@@ -7,6 +7,7 @@ declare(strict_types=1);
  *
  * @author Joas Schilling <coding@schilljs.com>
  * @author Lukas Reschke <lukas@statuscode.ch>
+ * @author Morris Jobke <hey@morrisjobke.de>
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -30,17 +31,23 @@ namespace OCA\UpdateNotification\AppInfo;
 use OCA\UpdateNotification\Notification\Notifier;
 use OCA\UpdateNotification\UpdateChecker;
 use OCP\AppFramework\App;
+use OCP\AppFramework\Bootstrap\IBootContext;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
 use OCP\AppFramework\QueryException;
 use OCP\IUser;
 use OCP\Util;
 
-class Application extends App {
+class Application extends App implements IBootstrap {
 	public function __construct() {
 		parent::__construct('updatenotification', []);
 	}
 
-	public function register() {
-		$server = $this->getContainer()->getServer();
+	public function register(IRegistrationContext $context): void {
+	}
+
+	public function boot(IBootContext $context): void {
+		$server = $context->getServerContainer();
 
 		if ($server->getConfig()->getSystemValue('updatechecker', true) !== true) {
 			// Updater check is disabled
@@ -48,7 +55,8 @@ class Application extends App {
 		}
 
 		// Always register the notifier, so background jobs (without a user) can send push notifications
-		$this->registerNotifier();
+		$notificationsManager = $server->getNotificationManager();
+		$notificationsManager->registerNotifierService(Notifier::class);
 
 		$user = $server->getUserSession()->getUser();
 		if (!$user instanceof IUser) {
@@ -59,7 +67,7 @@ class Application extends App {
 		if (!$server->getAppManager()->isEnabledForUser('notifications') &&
 			$server->getGroupManager()->isAdmin($user->getUID())) {
 			try {
-				$updateChecker = $this->getContainer()->query(UpdateChecker::class);
+				$updateChecker = $server->query(UpdateChecker::class);
 			} catch (QueryException $e) {
 				$server->getLogger()->logException($e);
 				return;
@@ -71,9 +79,4 @@ class Application extends App {
 			}
 		}
 	}
-
-	public function registerNotifier() {
-		$notificationsManager = $this->getContainer()->getServer()->getNotificationManager();
-		$notificationsManager->registerNotifierService(Notifier::class);
-	}
 }