diff --git a/app/config/container.php b/app/config/container.php
index 0fe26ac..19b6900 100644
--- a/app/config/container.php
+++ b/app/config/container.php
@@ -23,14 +23,12 @@ return [
     'app_files' => ['app', 'index.php', '.env', '.env.example', '.hidden'],
 
     /** Array of application middlewares */
-    'middlewares' => function (): array {
-        return [
-            Middlewares\WhoopsMiddleware::class,
-            Middlewares\PruneCacheMiddleware::class,
-            Middlewares\CacheControlMiddleware::class,
-            Middlewares\RegisterGlobalsMiddleware::class,
-        ];
-    },
+    'middlewares' => fn (): array => [
+        Middlewares\WhoopsMiddleware::class,
+        Middlewares\PruneCacheMiddleware::class,
+        Middlewares\CacheControlMiddleware::class,
+        Middlewares\RegisterGlobalsMiddleware::class,
+    ],
 
     /** Array of sort options mapped to their respective classes */
     'sort_methods' => [
diff --git a/app/src/Bootstrap/AppManager.php b/app/src/Bootstrap/AppManager.php
index 63d3da3..6b9eece 100644
--- a/app/src/Bootstrap/AppManager.php
+++ b/app/src/Bootstrap/AppManager.php
@@ -8,13 +8,10 @@ use Slim\App;
 
 class AppManager
 {
-    /** @var Container The applicaiton container */
-    protected $container;
-
     /** Create a new AppManager object. */
-    public function __construct(Container $container)
-    {
-        $this->container = $container;
+    public function __construct(
+        private Container $container
+    ) {
     }
 
     /** Setup and configure the application. */
diff --git a/app/src/Bootstrap/ExceptionManager.php b/app/src/Bootstrap/ExceptionManager.php
index d50ee1a..8375b2f 100644
--- a/app/src/Bootstrap/ExceptionManager.php
+++ b/app/src/Bootstrap/ExceptionManager.php
@@ -8,17 +8,11 @@ use Slim\App;
 
 class ExceptionManager
 {
-    /** @var App The application */
-    protected $app;
-
-    /** @var Config The application configuration */
-    protected $config;
-
     /** Create a new ExceptionManager object. */
-    public function __construct(App $app, Config $config)
-    {
-        $this->app = $app;
-        $this->config = $config;
+    public function __construct(
+        private App $app,
+        private Config $config
+    ) {
     }
 
     /** Set up and configure exception handling. */
diff --git a/app/src/Bootstrap/MiddlewareManager.php b/app/src/Bootstrap/MiddlewareManager.php
index 05eec57..dee0967 100644
--- a/app/src/Bootstrap/MiddlewareManager.php
+++ b/app/src/Bootstrap/MiddlewareManager.php
@@ -7,17 +7,11 @@ use Slim\App;
 
 class MiddlewareManager
 {
-    /** @var App The application */
-    protected $app;
-
-    /** @var Config The application configuration */
-    protected $config;
-
     /** Create a new MiddlwareManager object. */
-    public function __construct(App $app, Config $config)
-    {
-        $this->app = $app;
-        $this->config = $config;
+    public function __construct(
+        private App $app,
+        private Config $config
+    ) {
     }
 
     /** Register application middlewares. */
diff --git a/app/src/Bootstrap/RouteManager.php b/app/src/Bootstrap/RouteManager.php
index 909f5cc..def74ee 100644
--- a/app/src/Bootstrap/RouteManager.php
+++ b/app/src/Bootstrap/RouteManager.php
@@ -7,13 +7,10 @@ use Slim\App;
 
 class RouteManager
 {
-    /** @var App The application */
-    protected $app;
-
     /** Create a new RouteManager object. */
-    public function __construct(App $app)
-    {
-        $this->app = $app;
+    public function __construct(
+        private App $app
+    ) {
     }
 
     /** Register the application routes. */
diff --git a/app/src/Config.php b/app/src/Config.php
index 643bf43..d454828 100644
--- a/app/src/Config.php
+++ b/app/src/Config.php
@@ -7,13 +7,10 @@ use DI\NotFoundException;
 
 class Config
 {
-    /** @var Container The application container */
-    protected $container;
-
     /** Create a new Config object. */
-    public function __construct(Container $container)
-    {
-        $this->container = $container;
+    public function __construct(
+        private Container $container
+    ) {
     }
 
     /**
diff --git a/app/src/Controllers/DirectoryController.php b/app/src/Controllers/DirectoryController.php
index d01b9d7..b82993d 100644
--- a/app/src/Controllers/DirectoryController.php
+++ b/app/src/Controllers/DirectoryController.php
@@ -14,29 +14,13 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class DirectoryController
 {
-    /** @var Config The application configuration */
-    protected $config;
-
-    /** @var Finder File finder component */
-    protected $finder;
-
-    /** @var Twig Twig templating component */
-    protected $view;
-
-    /** @var TranslatorInterface Translator component */
-    protected $translator;
-
     /** Create a new IndexController object. */
     public function __construct(
-        Config $config,
-        Finder $finder,
-        Twig $view,
-        TranslatorInterface $translator
+        private Config $config,
+        private Finder $finder,
+        private Twig $view,
+        private TranslatorInterface $translator
     ) {
-        $this->config = $config;
-        $this->finder = $finder;
-        $this->view = $view;
-        $this->translator = $translator;
     }
 
     /** Invoke the IndexController. */
diff --git a/app/src/Controllers/FileInfoController.php b/app/src/Controllers/FileInfoController.php
index eb28532..25e5bb8 100644
--- a/app/src/Controllers/FileInfoController.php
+++ b/app/src/Controllers/FileInfoController.php
@@ -12,24 +12,12 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class FileInfoController
 {
-    /** @var Config The application configuration */
-    protected $config;
-
-    /** @var CacheInterface The application cache */
-    protected $cache;
-
-    /** @var TranslatorInterface Translator component */
-    protected $translator;
-
     /** Create a new FileInfoHandler object. */
     public function __construct(
-        Config $config,
-        CacheInterface $cache,
-        TranslatorInterface $translator
+        private Config $config,
+        private CacheInterface $cache,
+        private TranslatorInterface $translator
     ) {
-        $this->config = $config;
-        $this->cache = $cache;
-        $this->translator = $translator;
     }
 
     /** Invoke the FileInfoHandler. */
diff --git a/app/src/Controllers/IndexController.php b/app/src/Controllers/IndexController.php
index 2789f1f..dbbe658 100644
--- a/app/src/Controllers/IndexController.php
+++ b/app/src/Controllers/IndexController.php
@@ -9,13 +9,10 @@ use Slim\Psr7\Response;
 
 class IndexController
 {
-    /** @var Container Application container */
-    protected $container;
-
     /** Create a new IndexController object. */
-    public function __construct(Container $container)
-    {
-        $this->container = $container;
+    public function __construct(
+        private Container $container
+    ) {
     }
 
     /** Invoke the IndexController. */
diff --git a/app/src/Controllers/SearchController.php b/app/src/Controllers/SearchController.php
index 46ea15f..750d85d 100644
--- a/app/src/Controllers/SearchController.php
+++ b/app/src/Controllers/SearchController.php
@@ -11,21 +11,12 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class SearchController
 {
-    /** @var Finder File finder component */
-    protected $finder;
-
-    /** @var Twig Twig templating component */
-    protected $view;
-
-    /** @var TranslatorInterface Translator component */
-    protected $translator;
-
     /** Create a new SearchHandler object. */
-    public function __construct(Finder $finder, Twig $view, TranslatorInterface $translator)
-    {
-        $this->finder = $finder;
-        $this->view = $view;
-        $this->translator = $translator;
+    public function __construct(
+        private Finder $finder,
+        private Twig $view,
+        private TranslatorInterface $translator
+    ) {
     }
 
     /** Invoke the SearchHandler. */
diff --git a/app/src/Controllers/ZipController.php b/app/src/Controllers/ZipController.php
index 8e7638e..2c1de33 100644
--- a/app/src/Controllers/ZipController.php
+++ b/app/src/Controllers/ZipController.php
@@ -16,29 +16,13 @@ use ZipArchive;
 
 class ZipController
 {
-    /** @var Config The application configuration */
-    protected $config;
-
-    /** @var CacheInterface The application cache */
-    protected $cache;
-
-    /** @var Finder The Finder Component */
-    protected $finder;
-
-    /** @var TranslatorInterface Translator component */
-    protected $translator;
-
     /** Create a new ZipHandler object. */
     public function __construct(
-        Config $config,
-        CacheInterface $cache,
-        Finder $finder,
-        TranslatorInterface $translator
+        private Config $config,
+        private CacheInterface $cache,
+        private Finder $finder,
+        private TranslatorInterface $translator
     ) {
-        $this->config = $config;
-        $this->cache = $cache;
-        $this->finder = $finder;
-        $this->translator = $translator;
     }
 
     /** Invoke the ZipHandler. */
diff --git a/app/src/Exceptions/ErrorHandler.php b/app/src/Exceptions/ErrorHandler.php
index 353b6b8..9d0da3e 100644
--- a/app/src/Exceptions/ErrorHandler.php
+++ b/app/src/Exceptions/ErrorHandler.php
@@ -12,17 +12,11 @@ use Throwable;
 
 class ErrorHandler implements ErrorHandlerInterface
 {
-    /** @var Twig Twig templating component */
-    protected $view;
-
-    /** @var TranslatorInterface Translation component */
-    protected $translator;
-
     /** Create a new ErrorHandler object. */
-    public function __construct(Twig $view, TranslatorInterface $translator)
-    {
-        $this->view = $view;
-        $this->translator = $translator;
+    public function __construct(
+        private Twig $view,
+        private TranslatorInterface $translator
+    ) {
     }
 
     /** Invoke the ErrorHandler class. */
diff --git a/app/src/Factories/CacheFactory.php b/app/src/Factories/CacheFactory.php
index 95743d1..9dcdd35 100644
--- a/app/src/Factories/CacheFactory.php
+++ b/app/src/Factories/CacheFactory.php
@@ -23,17 +23,11 @@ class CacheFactory
     /** @const Namespace for internal cache drivers */
     protected const NAMESPACE_INTERNAL = 'app';
 
-    /** @var Container The application container */
-    protected $container;
-
-    /** @var Config The application configuration */
-    protected $config;
-
     /** Create a new CacheFactory object. */
-    public function __construct(Container $container, Config $config)
-    {
-        $this->container = $container;
-        $this->config = $config;
+    public function __construct(
+        private Container $container,
+        private Config $config
+    ) {
     }
 
     /** Initialize and return a CacheInterface. */
diff --git a/app/src/Factories/FinderFactory.php b/app/src/Factories/FinderFactory.php
index 7a1a19c..08d5ea3 100644
--- a/app/src/Factories/FinderFactory.php
+++ b/app/src/Factories/FinderFactory.php
@@ -14,27 +14,15 @@ use Symfony\Component\Finder\SplFileInfo;
 
 class FinderFactory
 {
-    /** @var Container The application container */
-    protected $container;
-
-    /** @var HiddenFiles Collection of hidden files */
-    protected $hiddenFiles;
-
-    /** @var Pattern|null Hidden files pattern cache */
-    protected $pattern;
-
-    /** @var Config The application configuration */
-    protected $config;
+    /** @var ?Pattern Hidden files pattern cache */
+    private ?Pattern $pattern = null;
 
     /** Create a new FinderFactory object. */
     public function __construct(
-        Container $container,
-        Config $config,
-        HiddenFiles $hiddenFiles
+        private Container $container,
+        private Config $config,
+        private HiddenFiles $hiddenFiles
     ) {
-        $this->container = $container;
-        $this->config = $config;
-        $this->hiddenFiles = $hiddenFiles;
     }
 
     /** Initialize and return the Finder component. */
diff --git a/app/src/Factories/TranslationFactory.php b/app/src/Factories/TranslationFactory.php
index f8be6e6..78d43bc 100644
--- a/app/src/Factories/TranslationFactory.php
+++ b/app/src/Factories/TranslationFactory.php
@@ -13,17 +13,11 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class TranslationFactory
 {
-    /** @var Config The applicaiton configuration */
-    protected $config;
-
-    /** @var CacheInterface The application cache */
-    protected $cache;
-
     /** Create a new TranslationFactory object. */
-    public function __construct(Config $config, CacheInterface $cache)
-    {
-        $this->config = $config;
-        $this->cache = $cache;
+    public function __construct(
+        private Config $config,
+        private CacheInterface $cache
+    ) {
     }
 
     /** Initialize and return the translation component. */
diff --git a/app/src/Factories/TwigFactory.php b/app/src/Factories/TwigFactory.php
index 7646a23..00f8c81 100644
--- a/app/src/Factories/TwigFactory.php
+++ b/app/src/Factories/TwigFactory.php
@@ -12,19 +12,11 @@ use Twig\TwigFunction;
 
 class TwigFactory
 {
-    /** @var Config The application configuration */
-    protected $config;
-
-    /** @var CallableResolver The callable resolver */
-    protected $callableResolver;
-
     /** Create a new TwigFactory object. */
     public function __construct(
-        Config $config,
-        CallableResolver $callableResolver
+        private Config $config,
+        private CallableResolver $callableResolver
     ) {
-        $this->config = $config;
-        $this->callableResolver = $callableResolver;
     }
 
     /** Initialize and return the Twig component. */
diff --git a/app/src/HiddenFiles.php b/app/src/HiddenFiles.php
index 241762f..227ea4d 100644
--- a/app/src/HiddenFiles.php
+++ b/app/src/HiddenFiles.php
@@ -7,13 +7,11 @@ use Tightenco\Collect\Support\Collection;
 
 class HiddenFiles extends Collection
 {
-    /** @inheritdoc */
     protected function __construct($items = [])
     {
         parent::__construct($items);
     }
 
-    /** {@inheritdoc} */
     public static function make($items = [])
     {
         throw new BadMethodCallException('Method not implemented');
diff --git a/app/src/Middlewares/CacheControlMiddleware.php b/app/src/Middlewares/CacheControlMiddleware.php
index 6327c6f..a1e6fd1 100644
--- a/app/src/Middlewares/CacheControlMiddleware.php
+++ b/app/src/Middlewares/CacheControlMiddleware.php
@@ -9,13 +9,10 @@ use Psr\Http\Server\RequestHandlerInterface as RequestHandler;
 
 class CacheControlMiddleware
 {
-    /** @var Config The application configuration */
-    protected $config;
-
     /** Create a new CacheControlMiddleware object. */
-    public function __construct(Config $config)
-    {
-        $this->config = $config;
+    public function __construct(
+        private Config $config
+    ) {
     }
 
     /** Invoke the CacheControlMiddleware class. */
diff --git a/app/src/Middlewares/PruneCacheMiddleware.php b/app/src/Middlewares/PruneCacheMiddleware.php
index 5731a88..cadb1e9 100644
--- a/app/src/Middlewares/PruneCacheMiddleware.php
+++ b/app/src/Middlewares/PruneCacheMiddleware.php
@@ -11,17 +11,11 @@ use Symfony\Contracts\Cache\CacheInterface;
 
 class PruneCacheMiddleware
 {
-    /** @var Config The application configuration */
-    protected $config;
-
-    /** @var CacheInterface The application cache */
-    protected $cache;
-
     /** Create a new CachePruneMiddleware object. */
-    public function __construct(Config $config, CacheInterface $cache)
-    {
-        $this->config = $config;
-        $this->cache = $cache;
+    public function __construct(
+        private Config $config,
+        private CacheInterface $cache
+    ) {
     }
 
     /** Invoke the CachePruneMiddleware class. */
diff --git a/app/src/Middlewares/RegisterGlobalsMiddleware.php b/app/src/Middlewares/RegisterGlobalsMiddleware.php
index 2a6550a..57a67b3 100644
--- a/app/src/Middlewares/RegisterGlobalsMiddleware.php
+++ b/app/src/Middlewares/RegisterGlobalsMiddleware.php
@@ -12,12 +12,9 @@ class RegisterGlobalsMiddleware
     /** Array of valid theme strings. */
     private const VALID_THEMES = ['dark', 'light'];
 
-    /** @var Twig Twig templating component */
-    protected $view;
-
-    public function __construct(Twig $view)
-    {
-        $this->view = $view;
+    public function __construct(
+        private Twig $view
+    ) {
     }
 
     /** Invoke the RegisterGlobalsMiddleware class. */
diff --git a/app/src/Middlewares/WhoopsMiddleware.php b/app/src/Middlewares/WhoopsMiddleware.php
index d90d0be..7e8c5a4 100644
--- a/app/src/Middlewares/WhoopsMiddleware.php
+++ b/app/src/Middlewares/WhoopsMiddleware.php
@@ -11,24 +11,12 @@ use Whoops\RunInterface;
 
 class WhoopsMiddleware
 {
-    /** @var RunInterface The Whoops component */
-    protected $whoops;
-
-    /** @var PrettyPageHandler The pretty page handler */
-    protected $pageHandler;
-
-    /** @var JsonResponseHandler The JSON response handler */
-    protected $jsonHandler;
-
     /** Create a new WhoopseMiddleware object. */
     public function __construct(
-        RunInterface $whoops,
-        PrettyPageHandler $pageHandler,
-        JsonResponseHandler $jsonHandler
+        private RunInterface $whoops,
+        private PrettyPageHandler $pageHandler,
+        private JsonResponseHandler $jsonHandler
     ) {
-        $this->whoops = $whoops;
-        $this->pageHandler = $pageHandler;
-        $this->jsonHandler = $jsonHandler;
     }
 
     /** Invoke the WhoopseMiddleware class. */
diff --git a/app/src/TemporaryFile.php b/app/src/TemporaryFile.php
index ce2390f..dfb85e7 100644
--- a/app/src/TemporaryFile.php
+++ b/app/src/TemporaryFile.php
@@ -5,7 +5,7 @@ namespace App;
 class TemporaryFile
 {
     /** @var string Path to the temporary file */
-    protected $path;
+    private string $path;
 
     /** Create a new TemporaryFile object. */
     public function __construct(string $dir, string $prefix = '')
diff --git a/app/src/ViewFunctions/Asset.php b/app/src/ViewFunctions/Asset.php
index 8216dba..989080e 100644
--- a/app/src/ViewFunctions/Asset.php
+++ b/app/src/ViewFunctions/Asset.php
@@ -7,16 +7,12 @@ use Tightenco\Collect\Support\Collection;
 
 class Asset extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'asset';
-
-    /** @var Config The application configuration */
-    protected $config;
+    protected string $name = 'asset';
 
     /** Create a new Asset object. */
-    public function __construct(Config $container)
-    {
-        $this->config = $container;
+    public function __construct(
+        private Config $config
+    ) {
     }
 
     /** Return the path to an asset. */
diff --git a/app/src/ViewFunctions/Breadcrumbs.php b/app/src/ViewFunctions/Breadcrumbs.php
index d4f123c..becf646 100644
--- a/app/src/ViewFunctions/Breadcrumbs.php
+++ b/app/src/ViewFunctions/Breadcrumbs.php
@@ -8,22 +8,13 @@ use Tightenco\Collect\Support\Collection;
 
 class Breadcrumbs extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'breadcrumbs';
-
-    /** @var Config The application configuration */
-    protected $config;
-
-    /** @var string The directory separator */
-    protected $directorySeparator;
+    protected string $name = 'breadcrumbs';
 
     /** Create a new Breadcrumbs object. */
     public function __construct(
-        Config $config,
-        string $directorySeparator = DIRECTORY_SEPARATOR
+        private Config $config,
+        private string $directorySeparator = DIRECTORY_SEPARATOR
     ) {
-        $this->config = $config;
-        $this->directorySeparator = $directorySeparator;
     }
 
     /** Build a collection of breadcrumbs for a given path. */
diff --git a/app/src/ViewFunctions/Config.php b/app/src/ViewFunctions/Config.php
index daf8de4..bb385ea 100644
--- a/app/src/ViewFunctions/Config.php
+++ b/app/src/ViewFunctions/Config.php
@@ -6,16 +6,12 @@ use App\Config as AppConfig;
 
 class Config extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'config';
-
-    /** @var AppConfig The application configuration */
-    protected $config;
+    protected string $name = 'config';
 
     /** Create a new Config object. */
-    public function __construct(AppConfig $config)
-    {
-        $this->config = $config;
+    public function __construct(
+        private AppConfig $config
+    ) {
     }
 
     /**
diff --git a/app/src/ViewFunctions/FileUrl.php b/app/src/ViewFunctions/FileUrl.php
index f42a9dc..1569de6 100644
--- a/app/src/ViewFunctions/FileUrl.php
+++ b/app/src/ViewFunctions/FileUrl.php
@@ -4,8 +4,7 @@ namespace App\ViewFunctions;
 
 class FileUrl extends Url
 {
-    /** @var string The function name */
-    protected $name = 'file_url';
+    protected string $name = 'file_url';
 
     /** Return the URL for a given path and action. */
     public function __invoke(string $path = '/'): string
diff --git a/app/src/ViewFunctions/Icon.php b/app/src/ViewFunctions/Icon.php
index e2dd586..b8abea5 100644
--- a/app/src/ViewFunctions/Icon.php
+++ b/app/src/ViewFunctions/Icon.php
@@ -7,16 +7,12 @@ use Symfony\Component\Finder\SplFileInfo;
 
 class Icon extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'icon';
-
-    /** @var Config The application configuration */
-    protected $config;
+    protected string $name = 'icon';
 
     /** Create a new Config object. */
-    public function __construct(Config $config)
-    {
-        $this->config = $config;
+    public function __construct(
+        private Config $config
+    ) {
     }
 
     /** Retrieve the icon markup for a file. */
diff --git a/app/src/ViewFunctions/Markdown.php b/app/src/ViewFunctions/Markdown.php
index 0b62b33..a194fe4 100644
--- a/app/src/ViewFunctions/Markdown.php
+++ b/app/src/ViewFunctions/Markdown.php
@@ -7,19 +7,12 @@ use Symfony\Contracts\Cache\CacheInterface;
 
 class Markdown extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'markdown';
+    protected string $name = 'markdown';
 
-    /** @var ParsedownExtra The markdown parser */
-    protected $parser;
-
-    /** @var CacheInterface */
-    protected $cache;
-
-    public function __construct(ParsedownExtra $parser, CacheInterface $cache)
-    {
-        $this->parser = $parser;
-        $this->cache = $cache;
+    public function __construct(
+        private ParsedownExtra $parser,
+        private CacheInterface $cache
+    ) {
     }
 
     /** Parses a string of markdown into HTML. */
diff --git a/app/src/ViewFunctions/ModifiedTime.php b/app/src/ViewFunctions/ModifiedTime.php
index 1c8d2d2..8a117e0 100644
--- a/app/src/ViewFunctions/ModifiedTime.php
+++ b/app/src/ViewFunctions/ModifiedTime.php
@@ -8,15 +8,11 @@ use Symfony\Component\Finder\SplFileInfo;
 
 class ModifiedTime extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'modified_time';
+    protected string $name = 'modified_time';
 
-    /** @var Config The application config */
-    private $config;
-
-    public function __construct(Config $config)
-    {
-        $this->config = $config;
+    public function __construct(
+        private Config $config
+    ) {
     }
 
     /** Get the modified time from a file object. */
diff --git a/app/src/ViewFunctions/ParentUrl.php b/app/src/ViewFunctions/ParentUrl.php
index 2add788..d65b209 100644
--- a/app/src/ViewFunctions/ParentUrl.php
+++ b/app/src/ViewFunctions/ParentUrl.php
@@ -6,16 +6,12 @@ use App\Support\Str;
 
 class ParentUrl extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'parent_url';
-
-    /** @var string The directory separator */
-    protected $directorySeparator;
+    protected string $name = 'parent_url';
 
     /** Create a new ParentUrl object. */
-    public function __construct(string $directorySeparator = DIRECTORY_SEPARATOR)
-    {
-        $this->directorySeparator = $directorySeparator;
+    public function __construct(
+        private string $directorySeparator = DIRECTORY_SEPARATOR
+    ) {
     }
 
     /** Get the parent directory for a given path. */
diff --git a/app/src/ViewFunctions/SizeForHumans.php b/app/src/ViewFunctions/SizeForHumans.php
index c818e6e..f417615 100644
--- a/app/src/ViewFunctions/SizeForHumans.php
+++ b/app/src/ViewFunctions/SizeForHumans.php
@@ -7,8 +7,7 @@ use Symfony\Component\Finder\SplFileInfo;
 
 class SizeForHumans extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'size_for_humans';
+    protected string $name = 'size_for_humans';
 
     /** Get the human readable file size from a file object. */
     public function __invoke(SplFileInfo $file): string
diff --git a/app/src/ViewFunctions/Translate.php b/app/src/ViewFunctions/Translate.php
index e5322ae..17d96fa 100644
--- a/app/src/ViewFunctions/Translate.php
+++ b/app/src/ViewFunctions/Translate.php
@@ -6,16 +6,12 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class Translate extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'translate';
-
-    /** @var TranslatorInterface The application translator */
-    protected $translator;
+    protected string $name = 'translate';
 
     /** Create a new Translate object. */
-    public function __construct(TranslatorInterface $translator)
-    {
-        $this->translator = $translator;
+    public function __construct(
+        private TranslatorInterface $translator
+    ) {
     }
 
     /** Retrieve a translated string by ID. */
diff --git a/app/src/ViewFunctions/Url.php b/app/src/ViewFunctions/Url.php
index 73c8711..f255f15 100644
--- a/app/src/ViewFunctions/Url.php
+++ b/app/src/ViewFunctions/Url.php
@@ -6,16 +6,12 @@ use App\Support\Str;
 
 class Url extends ViewFunction
 {
-    /** @var string The function name */
-    protected $name = 'url';
-
-    /** @var string The directory separator */
-    protected $directorySeparator;
+    protected string $name = 'url';
 
     /** Create a new Url object. */
-    public function __construct(string $directorySeparator = DIRECTORY_SEPARATOR)
-    {
-        $this->directorySeparator = $directorySeparator;
+    public function __construct(
+        private string $directorySeparator = DIRECTORY_SEPARATOR
+    ) {
     }
 
     /** Return the URL for a given path. */
diff --git a/app/src/ViewFunctions/ViewFunction.php b/app/src/ViewFunctions/ViewFunction.php
index 39535fc..7aad00c 100644
--- a/app/src/ViewFunctions/ViewFunction.php
+++ b/app/src/ViewFunctions/ViewFunction.php
@@ -5,7 +5,7 @@ namespace App\ViewFunctions;
 abstract class ViewFunction
 {
     /** @var string The function name */
-    protected $name = '';
+    protected string $name = '';
 
     /** Get the function name. */
     public function name(): string
diff --git a/app/src/ViewFunctions/ZipUrl.php b/app/src/ViewFunctions/ZipUrl.php
index 9763369..a13b2a8 100644
--- a/app/src/ViewFunctions/ZipUrl.php
+++ b/app/src/ViewFunctions/ZipUrl.php
@@ -4,8 +4,7 @@ namespace App\ViewFunctions;
 
 class ZipUrl extends Url
 {
-    /** @var string The function name */
-    protected $name = 'zip_url';
+    protected string $name = 'zip_url';
 
     /** Return the URL for a given path and action. */
     public function __invoke(string $path = '/'): string
diff --git a/tests/ViewFunctions/ViewFunctionTest.php b/tests/ViewFunctions/ViewFunctionTest.php
index 0a8c125..a13ddec 100644
--- a/tests/ViewFunctions/ViewFunctionTest.php
+++ b/tests/ViewFunctions/ViewFunctionTest.php
@@ -11,7 +11,7 @@ class ViewFunctionTest extends TestCase
     public function test_it_can_be_extended(): void
     {
         $viewFunction = new class extends ViewFunction {
-            protected $name = 'foo';
+            protected string $name = 'foo';
         };
 
         $this->assertInstanceOf(ViewFunction::class, $viewFunction);