diff --git a/composer-dependency-analyser.php b/composer-dependency-analyser.php
new file mode 100644
index 0000000..fc86a1f
--- /dev/null
+++ b/composer-dependency-analyser.php
@@ -0,0 +1,10 @@
+<?php
+
+use ShipMonk\ComposerDependencyAnalyser\Config\Configuration;
+use ShipMonk\ComposerDependencyAnalyser\Config\ErrorType;
+
+return (new Configuration())
+    ->ignoreErrorsOnPackage('symfony/translation', [ErrorType::SHADOW_DEPENDENCY])
+    ->ignoreErrorsOnPackage('contao/newsletter-bundle', [ErrorType::DEV_DEPENDENCY_IN_PROD])
+    ->ignoreUnknownClasses([Symfony\Component\HttpKernel\UriSigner::class, Contao\ModulePassword::class])
+;
diff --git a/composer.json b/composer.json
index 9a809f4..a8b92e0 100644
--- a/composer.json
+++ b/composer.json
@@ -32,6 +32,7 @@
         "doctrine/orm": "^2.19",
         "knplabs/knp-menu": "^3.1",
         "psr/container": "^1.0 || ^2.0",
+        "psr/log": "^2.0 || ^3.0",
         "ramsey/collection": "^1.2",
         "soundasleep/html2text": "^2.0",
         "symfony/asset": "^5.4 || ^6.0 || ^7.0",
diff --git a/phpstan.neon b/phpstan.neon
index 88596f0..907334c 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,3 +1,5 @@
 parameters:
 	excludePaths:
-		- src/Legacy/LostPasswordModule.php
\ No newline at end of file
+		- src/Legacy/LostPasswordModule.php
+	ignoreErrors:
+		- '#Symfony\\Component\\HttpKernel\\UriSigner#'
diff --git a/src/BulkyItem/BulkyItemStorage.php b/src/BulkyItem/BulkyItemStorage.php
index 2e8323c..0cf59e6 100644
--- a/src/BulkyItem/BulkyItemStorage.php
+++ b/src/BulkyItem/BulkyItemStorage.php
@@ -7,7 +7,8 @@
 use Contao\CoreBundle\Filesystem\ExtraMetadata;
 use Contao\CoreBundle\Filesystem\VirtualFilesystemException;
 use Contao\CoreBundle\Filesystem\VirtualFilesystemInterface;
-use Symfony\Component\HttpFoundation\UriSigner;
+use Symfony\Component\HttpFoundation\UriSigner as HttpFoundationUriSigner;
+use Symfony\Component\HttpKernel\UriSigner as HttpKernelUriSigner;
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use Symfony\Component\Routing\RouterInterface;
 use Symfony\Component\Uid\Uuid;
@@ -19,7 +20,7 @@ class BulkyItemStorage
     public function __construct(
         private readonly VirtualFilesystemInterface $filesystem,
         private readonly RouterInterface $router,
-        private readonly UriSigner $uriSigner,
+        private readonly HttpFoundationUriSigner|HttpKernelUriSigner $uriSigner,
         private readonly int $retentionPeriodInDays = 7,
     ) {
     }
diff --git a/src/Controller/DownloadBulkyItemController.php b/src/Controller/DownloadBulkyItemController.php
index d038ef0..8cf37ab 100644
--- a/src/Controller/DownloadBulkyItemController.php
+++ b/src/Controller/DownloadBulkyItemController.php
@@ -7,8 +7,9 @@
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\StreamedResponse;
-use Symfony\Component\HttpFoundation\UriSigner;
+use Symfony\Component\HttpFoundation\UriSigner as HttpFoundationUriSigner;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\UriSigner as HttpKernelUriSigner;
 use Symfony\Component\Routing\Attribute\Route;
 use Terminal42\NotificationCenterBundle\BulkyItem\BulkyItemStorage;
 
@@ -16,7 +17,7 @@
 class DownloadBulkyItemController
 {
     public function __construct(
-        private readonly UriSigner $uriSigner,
+        private readonly HttpFoundationUriSigner|HttpKernelUriSigner $uriSigner,
         private readonly BulkyItemStorage $bulkyItemStorage,
     ) {
     }
diff --git a/tests/BulkyItem/BulkItemStorageTest.php b/tests/BulkyItem/BulkItemStorageTest.php
index 2e1db79..aaba9da 100644
--- a/tests/BulkyItem/BulkItemStorageTest.php
+++ b/tests/BulkyItem/BulkItemStorageTest.php
@@ -8,8 +8,10 @@
 use Contao\CoreBundle\Filesystem\FilesystemItem;
 use Contao\CoreBundle\Filesystem\FilesystemItemIterator;
 use Contao\CoreBundle\Filesystem\VirtualFilesystemInterface;
+use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
-use Symfony\Component\HttpFoundation\UriSigner;
+use Symfony\Component\HttpFoundation\UriSigner as HttpFoundationUriSigner;
+use Symfony\Component\HttpKernel\UriSigner as HttpKernelUriSigner;
 use Symfony\Component\Routing\RouterInterface;
 use Terminal42\NotificationCenterBundle\BulkyItem\BulkyItemStorage;
 use Terminal42\NotificationCenterBundle\BulkyItem\FileItem;
@@ -74,7 +76,7 @@ function (ExtraMetadata $meta) {
             )
         ;
 
-        $storage = new BulkyItemStorage($vfs, $this->createMock(RouterInterface::class), $this->createMock(UriSigner::class));
+        $storage = new BulkyItemStorage($vfs, $this->createMock(RouterInterface::class), $this->mockUriSigner());
         $voucher = $storage->store($this->createFileItem());
 
         $this->assertTrue(BulkyItemStorage::validateVoucherFormat($voucher));
@@ -90,7 +92,7 @@ public function testHas(): void
             ->willReturn(true)
         ;
 
-        $storage = new BulkyItemStorage($vfs, $this->createMock(RouterInterface::class), $this->createMock(UriSigner::class));
+        $storage = new BulkyItemStorage($vfs, $this->createMock(RouterInterface::class), $this->mockUriSigner());
         $this->assertTrue($storage->has('a10aed4d-abe1-498f-adfc-b2e54fbbcbde'));
     }
 
@@ -120,7 +122,7 @@ public function testRetrieve(): void
             ->willReturn($this->createStream())
         ;
 
-        $storage = new BulkyItemStorage($vfs, $this->createMock(RouterInterface::class), $this->createMock(UriSigner::class));
+        $storage = new BulkyItemStorage($vfs, $this->createMock(RouterInterface::class), $this->mockUriSigner());
         $item = $storage->retrieve('a10aed4d-abe1-498f-adfc-b2e54fbbcbde');
 
         $this->assertInstanceOf(FileItem::class, $item);
@@ -156,7 +158,7 @@ public function testPrune(): void
             ->with('20220101')
         ;
 
-        $storage = new BulkyItemStorage($vfs, $this->createMock(RouterInterface::class), $this->createMock(UriSigner::class));
+        $storage = new BulkyItemStorage($vfs, $this->createMock(RouterInterface::class), $this->mockUriSigner());
         $storage->prune();
     }
 
@@ -176,4 +178,14 @@ private function createStream()
 
         return $stream;
     }
+
+    /**
+     * For compatibility with Symfony 5, 6 and 7.
+     */
+    private function mockUriSigner(): HttpFoundationUriSigner|HttpKernelUriSigner|MockObject
+    {
+        $class = class_exists(HttpFoundationUriSigner::class) ? HttpFoundationUriSigner::class : HttpKernelUriSigner::class;
+
+        return $this->createMock($class);
+    }
 }
diff --git a/tests/Gateway/MailerGatewayTest.php b/tests/Gateway/MailerGatewayTest.php
index 991572e..7eb6e40 100644
--- a/tests/Gateway/MailerGatewayTest.php
+++ b/tests/Gateway/MailerGatewayTest.php
@@ -13,11 +13,14 @@
 use Contao\FrontendTemplate;
 use Contao\TestCase\ContaoTestCase;
 use League\Flysystem\InMemory\InMemoryFilesystemAdapter;
+use PHPUnit\Framework\MockObject\MockObject;
 use Symfony\Component\DependencyInjection\Container;
 use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
-use Symfony\Component\HttpFoundation\UriSigner;
+use Symfony\Component\HttpFoundation\UriSigner as HttpFoundationUriSigner;
+use Symfony\Component\HttpKernel\UriSigner as HttpKernelUriSigner;
 use Symfony\Component\Mailer\MailerInterface;
 use Symfony\Component\Mime\Email;
+use Symfony\Component\Mime\Header\ParameterizedHeader;
 use Symfony\Component\Routing\RouterInterface;
 use Terminal42\NotificationCenterBundle\BulkyItem\BulkyItemStorage;
 use Terminal42\NotificationCenterBundle\Config\LanguageConfig;
@@ -57,7 +60,20 @@ static function (Email $email) use ($parsedTemplateHtml, $expectedAttachmentsCon
                     $attachments = [];
 
                     foreach ($email->getAttachments() as $attachment) {
-                        $attachments[$attachment->getBody()] = $attachment->getName();
+                        // getName() method does not exist in Symfony 5 (Contao 4.13)
+                        // see https://github.com/symfony/symfony/commit/ebd8697c7ee8daa7011da3222ebbb6dfb5e30171
+                        if (method_exists($attachment, 'getName')) {
+                            $attachments[$attachment->getBody()] = $attachment->getName();
+                            continue;
+                        }
+
+                        $header = $attachment->getPreparedHeaders()->get('Content-Type');
+
+                        if (!$header instanceof ParameterizedHeader || !($name = $header->getParameter('name'))) {
+                            continue;
+                        }
+
+                        $attachments[$attachment->getBody()] = $name;
                     }
 
                     $expectedHtml = $parsedTemplateHtml;
@@ -90,7 +106,7 @@ static function (Email $email) use ($parsedTemplateHtml, $expectedAttachmentsCon
             $mailer,
         );
         $container = new Container();
-        $container->set(AbstractGateway::SERVICE_NAME_BULKY_ITEM_STORAGE, new BulkyItemStorage($vfsCollection->get('bulky_item'), $this->createMock(RouterInterface::class), $this->createMock(UriSigner::class)));
+        $container->set(AbstractGateway::SERVICE_NAME_BULKY_ITEM_STORAGE, new BulkyItemStorage($vfsCollection->get('bulky_item'), $this->createMock(RouterInterface::class), $this->mockUriSigner()));
         $container->set(AbstractGateway::SERVICE_NAME_SIMPLE_TOKEN_PARSER, new SimpleTokenParser(new ExpressionLanguage()));
         $gateway->setContainer($container);
 
@@ -164,13 +180,36 @@ private function createFrameWorkWithTemplate(string $parsedTemplateHtml): Contao
             ->willReturn($parsedTemplateHtml)
         ;
 
-        return $this->mockContaoFramework(
+        $framework = $this->mockContaoFramework(
             [
                 Controller::class => $controllerAdapter,
             ],
-            [
-                FrontendTemplate::class => $templateInstance,
-            ],
         );
+
+        // contao/test-case 4.13 does not support "$instances" on `mockContaoFramework`
+        $framework
+            ->method('createInstance')
+            ->willReturnCallback(
+                static function (string $key) use ($templateInstance): mixed {
+                    if (FrontendTemplate::class === $key) {
+                        return $templateInstance;
+                    }
+
+                    return null;
+                },
+            )
+        ;
+
+        return $framework;
+    }
+
+    /**
+     * For compatibility with Symfony 5, 6 and 7.
+     */
+    private function mockUriSigner(): HttpFoundationUriSigner|HttpKernelUriSigner|MockObject
+    {
+        $class = class_exists(HttpFoundationUriSigner::class) ? HttpFoundationUriSigner::class : HttpKernelUriSigner::class;
+
+        return $this->createMock($class);
     }
 }