diff --git a/appinfo/info.xml b/appinfo/info.xml
index 246a322c..52baab1a 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -23,7 +23,7 @@
 	<repository>https://github.com/ChristophWurst/nextcloud_sentry</repository>
 	<dependencies>
 		<php min-version="7.2" max-version="7.4" />
-		<nextcloud min-version="17" max-version="19" />
+		<nextcloud min-version="20" max-version="20" />
 	</dependencies>
 	<commands>
 		<command>OCA\Sentry\Command\Test</command>
diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 903dda6d..d5d2d1e1 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -1,4 +1,5 @@
 <?php
+
 declare(strict_types=1);
 
 /**
@@ -23,95 +24,69 @@
 
 namespace OCA\Sentry\AppInfo;
 
+use OCA\Sentry\Config;
 use OCA\Sentry\Reporter\RecursionAwareReporter;
 use OCA\Sentry\Reporter\SentryReporterAdapter;
 use OCP\AppFramework\App;
-use OCP\AppFramework\Http\ContentSecurityPolicy;
-use OCP\EventDispatcher\IEventDispatcher;
+use OCP\AppFramework\Bootstrap\IBootContext;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
 use OCP\IConfig;
+use OCP\IContainer;
 use OCP\IInitialStateService;
-use OCP\Security\CSP\AddContentSecurityPolicyEvent;
-use OCP\Support\CrashReport\IRegistry;
 use function Sentry\init as initSentry;
 
-class Application extends App {
+class Application extends App implements IBootstrap {
 
-	/**
-	 * @param array $urlParams
-	 */
-	public function __construct($urlParams = []) {
-		parent::__construct('sentry', $urlParams);
+	public const APP_ID = 'sentry';
 
-		$container = $this->getContainer();
+	public function __construct() {
+		parent::__construct(self::APP_ID, []);
+	}
 
-		/* @var $config IConfig */
-		$config = $container->query(IConfig::class);
-		$publicDsn = $config->getSystemValueString('sentry.public-dsn', '');
-		$dsn = $config->getSystemValue('sentry.dsn', $publicDsn);
-		$reportUrl = $config->getSystemValue('sentry.csp-report-url', null);
+	public function register(IRegistrationContext $context): void {
+		$context->registerCrashReporter(RecursionAwareReporter::class);
 
-		if ($dsn !== '') {
-			$this->registerClient($dsn);
-		}
-		$this->setInitialState($publicDsn);
+		$context->registerService(RecursionAwareReporter::class, function (IContainer $c) {
+			/** @var SentryReporterAdapter $reporter */
+			$reporter = $c->query(SentryReporterAdapter::class);
 
-		/** @var IEventDispatcher $dispatcher */
-		$dispatcher = $container->query(IEventDispatcher::class);
-		$dispatcher->addListener(AddContentSecurityPolicyEvent::class, function (AddContentSecurityPolicyEvent $event) use ($reportUrl, $publicDsn) {
-			$event->addPolicy($this->createCsp($publicDsn, $reportUrl));
+			return new RecursionAwareReporter($reporter);
 		});
 	}
 
-	/**
-	 * @param string $dsn
-	 */
-	private function registerClient(string $dsn): void {
-		$container = $this->getContainer();
-		/* @var $config IConfig */
-		$config = $container->query(IConfig::class);
-
-		initSentry([
-			'dsn' => $dsn,
-			'release' => $config->getSystemValue('version', '0.0.0'),
-		]);
-
-		/* @var $registry IRegistry */
-		$registry = $container->query(IRegistry::class);
-		$reporter = $container->query(SentryReporterAdapter::class);
-		$registry->register(new RecursionAwareReporter($reporter));
+	public function boot(IBootContext $context): void {
+		$this->initSentry(
+			$context->getAppContainer()->query(IConfig::class),
+			$context->getAppContainer()->query(Config::class)
+		);
+		$this->setInitialState(
+			$context->getAppContainer()->query(IInitialStateService::class),
+			$context->getAppContainer()->query(Config::class)
+		);
 	}
 
-	private function createCsp(?string $publicDsn, ?string $reportUrl): ContentSecurityPolicy {
-		$csp = new ContentSecurityPolicy();
-		if ($publicDsn === null && $reportUrl === null) {
-			// Don't add any custom CSP
-			return $csp;
-		}
-
-		if ($publicDsn !== null) {
-			$parsedUrl = parse_url($publicDsn);
-			if (isset($parsedUrl['scheme'], $parsedUrl['host'])) {
-				$domain = $parsedUrl['scheme'] . '://' . $parsedUrl['host'];
-				$csp->addAllowedConnectDomain($domain);
-			}
-		}
-		if ($reportUrl !== null) {
-			$csp->addReportTo($reportUrl);
-		}
-		return $csp;
+	private function setInitialState(IInitialStateService $stateService,
+									 Config $config): void {
+		$stateService->provideLazyInitialState('sentry', 'dsn', function () use ($config) {
+			return [
+				'dsn' => $config->getDsn(),
+			];
+		});
 	}
 
-	private function setInitialState(string $dsn): void {
-		$container = $this->getContainer();
+	private function initSentry(IConfig $sysConfig,
+								Config $config) {
+		$dsn = $config->getDsn();
 
-		/** @var IInitialStateService $stateService */
-		$stateService = $container->query(IInitialStateService::class);
+		if ($dsn === null) {
+			return;
+		}
 
-		$stateService->provideLazyInitialState('sentry', 'dsn', function () use ($dsn) {
-			return [
-				'dsn' => $dsn === '' ? null : $dsn,
-			];
-		});
+		initSentry([
+			'dsn' => $dsn,
+			'release' => $sysConfig->getSystemValue('version', '0.0.0'),
+		]);
 	}
 
 }
diff --git a/lib/Config.php b/lib/Config.php
new file mode 100644
index 00000000..4824d8e2
--- /dev/null
+++ b/lib/Config.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @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/>.
+ */
+
+namespace OCA\Sentry;
+
+use OCP\IConfig;
+
+class Config {
+
+	/** @var IConfig */
+	private $config;
+
+	public function __construct(IConfig $config) {
+		$this->config = $config;
+	}
+
+	public function getDsn(): ?string {
+		$dsn = $this->config->getSystemValue('sentry.dsn', $this->getPublicDsn());
+		return $dsn === '' ? null : $dsn;
+	}
+
+	public function getPublicDsn(): ?string {
+		$publicDsn = $this->config->getSystemValueString('sentry.public-dsn');
+		return $publicDsn === '' ? null : $publicDsn;
+	}
+
+	public function getReportUrl(): ?string {
+		return $this->config->getSystemValue('sentry.csp-report-url', null);
+	}
+
+}
diff --git a/lib/Listener/AddSentryCspListener.php b/lib/Listener/AddSentryCspListener.php
new file mode 100644
index 00000000..b05759e8
--- /dev/null
+++ b/lib/Listener/AddSentryCspListener.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @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/>.
+ */
+
+namespace OCA\Sentry\Listener;
+
+use OCA\Sentry\Config;
+use OCP\AppFramework\Http\ContentSecurityPolicy;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Security\CSP\AddContentSecurityPolicyEvent;
+use function parse_url;
+
+class AddSentryCspListener implements IEventListener {
+
+	/** @var Config */
+	private $config;
+
+	public function __construct(Config $config) {
+		$this->config = $config;
+	}
+
+	public function handle(Event $event): void {
+		if (!($event instanceof AddContentSecurityPolicyEvent)) {
+			return;
+		}
+
+		$event->addPolicy(
+			$this->createCsp(
+				$this->config->getPublicDsn(),
+				$this->config->getReportUrl()
+			)
+		);
+	}
+
+	private function createCsp(?string $publicDsn, ?string $reportUrl): ContentSecurityPolicy {
+		$csp = new ContentSecurityPolicy();
+		if ($publicDsn === null && $reportUrl === null) {
+			// Don't add any custom CSP
+			return $csp;
+		}
+
+		if ($publicDsn !== null) {
+			$parsedUrl = parse_url($publicDsn);
+			if (isset($parsedUrl['scheme'], $parsedUrl['host'])) {
+				$domain = $parsedUrl['scheme'] . '://' . $parsedUrl['host'];
+				$csp->addAllowedConnectDomain($domain);
+			}
+		}
+		if ($reportUrl !== null) {
+			$csp->addReportTo($reportUrl);
+		}
+		return $csp;
+	}
+}