diff --git a/lib/Config.php b/lib/Config.php
index f53a1d6..95b4115 100644
--- a/lib/Config.php
+++ b/lib/Config.php
@@ -11,13 +11,14 @@
 use OCP\IConfig;
 
 class Config {
-	public function __construct($appName, IConfig $config) {
-		$this->appName = $appName;
-		$this->config = $config;
+	public function __construct(
+		protected string $appName,
+		protected IConfig $config,
+	) {
 	}
 
 	public function getTrackingKey(): ?string {
-		$value = $this->config->getSystemValueString('googleanalytics_tracking_key', '');
+		$value = $this->config->getSystemValueString('googleanalytics_tracking_key');
 		return (empty($value)) ? null : $value;
 	}
 }
diff --git a/lib/Controller/JavaScriptController.php b/lib/Controller/JavaScriptController.php
index 9fcade1..c3d181b 100644
--- a/lib/Controller/JavaScriptController.php
+++ b/lib/Controller/JavaScriptController.php
@@ -9,6 +9,9 @@
 use OCA\NCGoogleAnalytics\Config;
 use OCA\NCGoogleAnalytics\Service\Consent\IConsentService;
 use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http\Attribute\NoAdminRequired;
+use OCP\AppFramework\Http\Attribute\NoCSRFRequired;
+use OCP\AppFramework\Http\Attribute\PublicPage;
 use OCP\AppFramework\Http\DataDownloadResponse;
 use OCP\AppFramework\Http\TextPlainResponse;
 use OCP\IRequest;
@@ -32,12 +35,11 @@ public function __construct(
 	}
 
 	/**
-	 * @NoAdminRequired
-	 * @NoCSRFRequired
-	 * @PublicPage
-	 *
 	 * @return TextPlainResponse|DataDownloadResponse
 	 */
+	#[NoAdminRequired]
+	#[NoCSRFRequired]
+	#[PublicPage]
 	public function tracking(): TextPlainResponse|DataDownloadResponse {
 		$gtmId = $this->config->getTrackingKey();