diff --git a/src/Controller/DownloadBulkyItemController.php b/src/Controller/DownloadBulkyItemController.php
index 2f89601..d038ef0 100644
--- a/src/Controller/DownloadBulkyItemController.php
+++ b/src/Controller/DownloadBulkyItemController.php
@@ -16,8 +16,8 @@
 class DownloadBulkyItemController
 {
     public function __construct(
-        private UriSigner $uriSigner,
-        private BulkyItemStorage $bulkyItemStorage,
+        private readonly UriSigner $uriSigner,
+        private readonly BulkyItemStorage $bulkyItemStorage,
     ) {
     }
 
diff --git a/src/Gateway/AbstractGateway.php b/src/Gateway/AbstractGateway.php
index 68213ba..10c58ad 100644
--- a/src/Gateway/AbstractGateway.php
+++ b/src/Gateway/AbstractGateway.php
@@ -91,7 +91,7 @@ protected function replaceTokens(Parcel $parcel, string $value, TokenCollection|
             return $value;
         }
 
-        $tokenCollection = $tokenCollection ?? $parcel->getStamp(TokenCollectionStamp::class)?->tokenCollection;
+        $tokenCollection ??= $parcel->getStamp(TokenCollectionStamp::class)?->tokenCollection;
 
         if (!$tokenCollection instanceof TokenCollection) {
             return $value;
diff --git a/src/Twig/NotificationCenterExtension.php b/src/Twig/NotificationCenterExtension.php
index c79d3bb..e66fb75 100644
--- a/src/Twig/NotificationCenterExtension.php
+++ b/src/Twig/NotificationCenterExtension.php
@@ -10,7 +10,7 @@
 
 class NotificationCenterExtension extends AbstractExtension
 {
-    public function __construct(private BulkyItemStorage $bulkyItemStorage)
+    public function __construct(private readonly BulkyItemStorage $bulkyItemStorage)
     {
     }