diff --git a/Controller/RoutingController.php b/Controller/RoutingController.php
index c88a288..4379ce4 100644
--- a/Controller/RoutingController.php
+++ b/Controller/RoutingController.php
@@ -36,8 +36,6 @@ public function __construct(RoutingExtractor $extractor, SerializerInterface $se
     /**
      * Return the exposed routes as JSON
      * This method does not have a route and is called directly from the twig template
-     *
-     * @return \Symfony\Component\HttpFoundation\Response
      */
     public function routingData(): JsonResponse
     {
diff --git a/DependencyInjection/XactJSRoutingExtension.php b/DependencyInjection/XactJSRoutingExtension.php
index e6fcb36..e16d7f7 100644
--- a/DependencyInjection/XactJSRoutingExtension.php
+++ b/DependencyInjection/XactJSRoutingExtension.php
@@ -11,13 +11,23 @@
 
 class XactJSRoutingExtension extends Extension implements PrependExtensionInterface
 {
-    public function load(array $configs, ContainerBuilder $container)
+    /**
+     * Load the DI configuration
+     *
+     * @param mixed[] $configs
+     *
+     * @phpcsSuppress SlevomatCodingStandard.Functions.UnusedParameter.UnusedParameter
+     */
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $loader = new YamlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
         $loader->load('services.yaml');
     }
 
-    public function prepend(ContainerBuilder $container)
+    /**
+     * Prepend the twig configuration with @XactJSRouting for accessing the template
+     */
+    public function prepend(ContainerBuilder $container): void
     {
         $fileSystem = new Filesystem();
         $projectDir = $container->getParameter('kernel.project_dir');
@@ -28,4 +38,3 @@ public function prepend(ContainerBuilder $container)
         $container->prependExtensionConfig('twig', $twigConfig);
     }
 }
-
diff --git a/Extractor/ExtractedRoute.php b/Extractor/ExtractedRoute.php
index 8d24fc6..1738000 100644
--- a/Extractor/ExtractedRoute.php
+++ b/Extractor/ExtractedRoute.php
@@ -13,39 +13,39 @@
 class ExtractedRoute
 {
     /**
-     * @var array
+     * @var string[]
      */
     private $tokens;
     /**
-     * @var array
+     * @var string[]
      */
     private $defaults;
     /**
-     * @var array
+     * @var string[]
      */
     private $requirements;
     /**
-     * @var array
+     * @var string[]
      */
     private $hosttokens;
     /**
-     * @var array
+     * @var string[]
      */
     private $methods;
     /**
-     * @var array
+     * @var string[]
      */
     private $schemes;
 
     /**
      * Constructor
      *
-     * @param array $tokens
-     * @param array $defaults
-     * @param array $requirements
-     * @param array $hosttokens
-     * @param array $methods
-     * @param array $schemes
+     * @param string[] $tokens
+     * @param string[] $defaults
+     * @param string[] $requirements
+     * @param string[] $hosttokens
+     * @param string[] $methods
+     * @param string[] $schemes
      */
     public function __construct(array $tokens, array $defaults, array $requirements, array $hosttokens = [], array $methods = [], array $schemes = [])
     {
@@ -60,9 +60,9 @@ public function __construct(array $tokens, array $defaults, array $requirements,
     /**
      * Return the route tokens
      *
-     * @return array
+     * @return string[]
      */
-    public function getTokens()
+    public function getTokens(): array
     {
         return $this->tokens;
     }
@@ -70,9 +70,9 @@ public function getTokens()
     /**
      * Return the route defaults
      *
-     * @return array
+     * @return string[]
      */
-    public function getDefaults()
+    public function getDefaults(): array
     {
         return $this->defaults;
     }
@@ -80,9 +80,9 @@ public function getDefaults()
     /**
      * Return the route requirements
      *
-     * @return array
+     * @return string[]
      */
-    public function getRequirements()
+    public function getRequirements(): array
     {
         return $this->requirements;
     }
@@ -90,9 +90,9 @@ public function getRequirements()
     /**
      * Return the route host tokens
      *
-     * @return array
+     * @return string[]
      */
-    public function getHosttokens()
+    public function getHosttokens(): array
     {
         return $this->hosttokens;
     }
@@ -100,9 +100,9 @@ public function getHosttokens()
     /**
      * Return the route methods
      *
-     * @return array
+     * @return string[]
      */
-    public function getMethods()
+    public function getMethods(): array
     {
         return $this->methods;
     }
@@ -110,9 +110,9 @@ public function getMethods()
     /**
      * Return the route schemes
      *
-     * @return array
+     * @return string[]
      */
-    public function getSchemes()
+    public function getSchemes(): array
     {
         return $this->schemes;
     }
diff --git a/Extractor/RoutingExtractor.php b/Extractor/RoutingExtractor.php
index 5126531..04de3f2 100644
--- a/Extractor/RoutingExtractor.php
+++ b/Extractor/RoutingExtractor.php
@@ -33,12 +33,9 @@ class RoutingExtractor
     /**
      * Default constructor.
      *
-     * @param RouterInterface $router
-     * @param string $cacheDir
-     * @param string $appEnv
-     * @param array $routesToExpose
+     * @param object[] $routesToExpose
      */
-    public function __construct(RouterInterface $router, $cacheDir, $appEnv, array $routesToExpose = [])
+    public function __construct(RouterInterface $router, string $cacheDir, string $appEnv, array $routesToExpose = [])
     {
         $this->router = $router;
         $this->routesToExpose = $routesToExpose;
@@ -59,7 +56,7 @@ public function getRoutes()
             $compiledRoute = $route->compile();
             $defaults = array_intersect_key(
                 $route->getDefaults(),
-                array_fill_keys($compiledRoute->getVariables(), NULL)
+                array_fill_keys($compiledRoute->getVariables(), null)
             );
             $requirements = $route->getRequirements();
             $hostTokens = method_exists($compiledRoute, 'getHostTokens') ? $compiledRoute->getHostTokens() : [];
@@ -86,12 +83,14 @@ public function getExposedRoutes()
         $pattern = $this->buildPattern();
 
         foreach ($collection->all() as $name => $route) {
-            if (FALSE === $route->getOption('expose')) {
+            if (false === $route->getOption('expose')) {
                 continue;
             }
 
-            if (($route->getOption('expose') && (TRUE === $route->getOption('expose') || 'true' === $route->getOption('expose')))
-                || ('' !== $pattern && preg_match('#' . $pattern . '#', $name))) {
+            if (
+                ($route->getOption('expose') && (true === $route->getOption('expose') || 'true' === $route->getOption('expose')))
+                || ('' !== $pattern && preg_match('#' . $pattern . '#', $name))
+            ) {
                 $routes[$name] = $route;
             }
         }
@@ -126,10 +125,8 @@ public function getHost()
 
     /**
      * Check whether server is serving this request from a non-standard port.
-     *
-     * @return bool
      */
-    protected function usesNonStandardPort()
+    protected function usesNonStandardPort(): bool
     {
         return $this->usesNonStandardHttpPort() || $this->usesNonStandardHttpsPort();
     }
@@ -167,10 +164,8 @@ public function getResources()
 
     /**
      * Convert the routesToExpose array in a regular expression pattern.
-     *
-     * @return string
      */
-    protected function buildPattern()
+    protected function buildPattern(): string
     {
         $patterns = [];
         foreach ($this->routesToExpose as $toExpose) {
@@ -182,20 +177,16 @@ protected function buildPattern()
 
     /**
      * Checks whether server is serving HTTP over a non-standard port.
-     *
-     * @return bool
      */
-    private function usesNonStandardHttpPort()
+    private function usesNonStandardHttpPort(): bool
     {
         return 'http' === $this->getScheme() && '80' != $this->router->getContext()->getHttpPort();
     }
 
     /**
      * Checks whether server is serving HTTPS over a non-standard port.
-     *
-     * @return bool
      */
-    private function usesNonStandardHttpsPort()
+    private function usesNonStandardHttpsPort(): bool
     {
         return 'https' === $this->getScheme() && '443' != $this->router->getContext()->getHttpsPort();
     }