diff --git a/ruleset.xml b/ruleset.xml
index 835fa82..2f9c705 100644
--- a/ruleset.xml
+++ b/ruleset.xml
@@ -2,7 +2,7 @@
 <ruleset name="Contributte" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="vendor/squizlabs/php_codesniffer/phpcs.xsd">
 	<!-- Rulesets -->
 	<rule ref="./vendor/contributte/qa/ruleset-8.0.xml">
-		<exclude name="SlevomatCodingStandard.PHP.DisallowReference.DisallowedPassingByReference"/>
+		<exclude name="Squiz.Strings.DoubleQuoteUsage.ContainsVar"/>
 	</rule>
 
 	<!-- Rules -->
diff --git a/src/DI/ApiDocuExtension.php b/src/DI/ApiDocuExtension.php
index 3bd1fa3..0bc3cef 100644
--- a/src/DI/ApiDocuExtension.php
+++ b/src/DI/ApiDocuExtension.php
@@ -1,6 +1,4 @@
-<?php
-
-declare(strict_types=1);
+<?php declare(strict_types = 1);
 
 namespace Contributte\ApiDocu\DI;
 
@@ -9,51 +7,49 @@
 use Nette\DI\CompilerExtension;
 use Nette\DI\Helpers;
 use Nette\PhpGenerator\ClassType;
+use Nette\Schema\Expect;
+use Nette\Schema\Schema;
+use stdClass;
 
+/**
+ * @property-read stdClass $config
+ */
 class ApiDocuExtension extends CompilerExtension
 {
 
-	/**
-	 * @var array<mixed>
-	 */
-	protected $config;
-
-	/**
-	 * @var array<string|array<null>>
-	 */
-	private $defaults = [
-		'apiDir' => '%wwwDir%/api',
-		'httpAuth' => [
-			'user' => null,
-			'password' => null,
-		],
-	];
-
+	public function getConfigSchema(): Schema
+	{
+		return Expect::structure([
+			'apiDir' => Expect::string()->default('%wwwDir%/api'),
+			'httpAuth' => Expect::structure([
+				'user' => Expect::string(),
+				'password' => Expect::string(),
+			]),
+		]);
+	}
 
 	public function loadConfiguration(): void
 	{
 		$this->config = $this->prepareConfig();
 	}
 
-
 	public function beforeCompile(): void
 	{
 		$builder = $this->getContainerBuilder();
 		$config = $this->config;
 
 		$builder->addDefinition($this->prefix('generator'))
-			->setClass(Generator::class)
-			->setArguments([$config['apiDir'], $config['httpAuth']]);
+			->setType(Generator::class)
+			->setArguments([$config->apiDir, (array) $config->httpAuth]);
 
 		$builder->addDefinition($this->prefix('starter'))
-			->setClass(Starter::class)
+			->setType(Starter::class)
 			->setArguments([
 				$builder->getDefinition($this->prefix('generator')),
 				$builder->getDefinition('router'),
 			]);
 	}
 
-
 	public function afterCompile(ClassType $class): void
 	{
 		parent::afterCompile($class);
@@ -64,19 +60,13 @@ public function afterCompile(ClassType $class): void
 		);
 	}
 
-
-	/**
-	 * @return array<mixed>
-	 */
-	protected function prepareConfig(): array
+	protected function prepareConfig(): stdClass
 	{
-		$config = $this->validateConfig($this->defaults, $this->config);
-
-		$config['apiDir'] = Helpers::expand(
-			$config['apiDir'],
-			$this->getContainerBuilder()->parameters
-		);
+		/** @var stdClass $config */
+		$config = $this->getConfig();
+		$config->apiDir = Helpers::expand($config->apiDir, $this->getContainerBuilder()->parameters);
 
 		return $config;
 	}
+
 }
diff --git a/src/Generator.php b/src/Generator.php
index bc85d89..c954c77 100644
--- a/src/Generator.php
+++ b/src/Generator.php
@@ -1,58 +1,45 @@
-<?php
-
-declare(strict_types=1);
+<?php declare(strict_types = 1);
 
 namespace Contributte\ApiDocu;
 
 use Contributte\ApiRouter\ApiRoute;
-use Nette\Application\IRouter;
 use Nette\Application\Routers\RouteList;
-use Nette\Application\UI\ITemplateFactory;
+use Nette\Application\UI\TemplateFactory;
 use Nette\Bridges\ApplicationLatte\DefaultTemplate;
 use Nette\Bridges\ApplicationLatte\Template;
-use Nette\Http;
+use Nette\Http\Request;
+use Nette\Routing\Router;
 use Tracy\Debugger;
 
 class Generator
 {
 
-	/**
-	 * @var ITemplateFactory
-	 */
-	private $templateFactory;
+	private TemplateFactory $templateFactory;
 
-	/**
-	 * @var Http\Request
-	 */
-	private $httpRequest;
+	private Request $httpRequest;
 
-	/**
-	 * @var string
-	 */
-	private $appDir;
+	private string $appDir;
 
-	/**
-	 * @var array<mixed>
-	 */
-	private $httpAuth;
+	/** @var array{user: ?string, password: ?string} */
+	private array $httpAuth;
 
 	/**
-	 * @param array<mixed> $httpAuth
+	 * @param array{user: ?string, password: ?string} $httpAuth
 	 */
 	public function __construct(
 		string $appDir,
 		array $httpAuth,
-		ITemplateFactory $templateFactory,
-		Http\Request $httpRequest
-	) {
+		TemplateFactory $templateFactory,
+		Request $httpRequest
+	)
+	{
 		$this->appDir = $appDir;
 		$this->httpAuth = $httpAuth;
 		$this->templateFactory = $templateFactory;
 		$this->httpRequest = $httpRequest;
 	}
 
-
-	public function generateAll(IRouter $router): void
+	public function generateAll(Router $router): void
 	{
 		$sections = $this->splitRoutesIntoSections($router);
 
@@ -71,7 +58,7 @@ public function generateAll(IRouter $router): void
 		foreach ($sections as $sectionName => $routes) {
 			if (is_array($routes)) {
 				foreach ($routes as $fileName => $route) {
-					$this->generateOne($route, $sections, "$sectionName.$fileName");
+					$this->generateOne($route, $sections, $sectionName . '.' . $fileName);
 				}
 			} else {
 				$this->generateOne($routes, $sections, (string) $sectionName);
@@ -95,7 +82,7 @@ public function generateTarget(ApiRoute $route, array $parameters): void
 			'httpRequest' => $this->httpRequest,
 		]);
 
-		if (class_exists('Tracy\Debugger')) {
+		if (class_exists(Debugger::class)) {
 			Debugger::$productionMode = true;
 		}
 
@@ -139,7 +126,6 @@ public function generateIndex(array $sections): void
 		);
 	}
 
-
 	public function generateSuccess(): void
 	{
 		/** @var DefaultTemplate $template */
@@ -149,22 +135,17 @@ public function generateSuccess(): void
 			'apiDir' => $this->appDir,
 		]);
 
-		if (class_exists('Tracy\Debugger')) {
+		if (class_exists(Debugger::class)) {
 			Debugger::$productionMode = true;
 		}
 
 		echo (string) $template;
 	}
 
-
 	public function createTemplate(string $which): Template
 	{
-		/** @var DefaultTemplate|null $template */
 		$template = $this->templateFactory->createTemplate();
-
-		if (!$template instanceof Template) {
-			throw new \UnexpectedValueException;
-		}
+		assert($template instanceof DefaultTemplate);
 
 		$template->addFilter(null, 'Contributte\ApiDocu\TemplateFilters::common');
 
@@ -172,9 +153,7 @@ public function createTemplate(string $which): Template
 
 		$template->setParameters(['base_dir' => __DIR__ . '/templates']);
 
-		$template->addFilter('routeMaskStyles', function ($mask): string {
-			return str_replace(['<', '>'], ['<span class="apiDocu-mask-param">&lt;', '&gt;</span>'], $mask);
-		});
+		$template->addFilter('routeMaskStyles', fn ($mask): string => str_replace(['<', '>'], ['<span class="apiDocu-mask-param">&lt;', '&gt;</span>'], $mask));
 
 		$template->addFilter('apiDocuResponseCode', function ($code): string {
 			if ($code >= 200 && $code <= 202) {
@@ -197,13 +176,13 @@ public function createTemplate(string $which): Template
 
 
 	/********************************************************************************
-	 *                                   INTERNAL                                   *
+	 *                                   INTERNAL *
 	 ********************************************************************************/
 
 	/**
-	 * @return array<mixed>
+	 * @return array<int<1,max>|string, array<int,ApiRoute>|ApiRoute>
 	 */
-	private function splitRoutesIntoSections(IRouter $router): array
+	private function splitRoutesIntoSections(Router $router): array
 	{
 		$routes = [];
 		$sections = [];
@@ -211,17 +190,14 @@ private function splitRoutesIntoSections(IRouter $router): array
 
 		if ($router instanceof ApiRoute) {
 			$routes = [$router];
-		} elseif ($router instanceof \IteratorAggregate) {
+		} elseif ($router instanceof RouteList) {
 			$routes = $this->getApiRoutesFromIterator($router);
 		}
 
 		foreach ($routes as $route) {
-			if ($route->getSection()) {
-				if ($sections !== [] && $sections[$route->getSection()] === []) {
-					$sections[$route->getSection()] = [];
-				}
-
-				$sections[$route->getSection()][$fileName] = $route;
+			if ($route->getSection() !== null) {
+				$sections[$route->getSection()] ??= [];
+				$sections[$route->getSection()][$fileName] = $route; // @phpstan-ignore-line
 			} else {
 				$sections[$fileName] = $route;
 			}
@@ -232,21 +208,20 @@ private function splitRoutesIntoSections(IRouter $router): array
 		return $sections;
 	}
 
-
 	/**
 	 * Recursively flatten \IteratorAggregate (probably Nette\Application\Routers\RouteList)
-	 * @return array<mixed>
+	 *
+	 * @return array<ApiRoute>
 	 */
-	private function getApiRoutesFromIterator(\IteratorAggregate $i): array
+	private function getApiRoutesFromIterator(RouteList $routeList): array
 	{
 		$return = [];
+		$routers = $routeList->getRouters();
 
-		/** @var RouteList $i */
-		$routers = $i->getRouters();
 		foreach ($routers as $router) {
 			if ($router instanceof ApiRoute) {
 				$return[] = $router;
-			} elseif ($router instanceof \IteratorAggregate) {
+			} elseif ($router instanceof RouteList) {
 				$routes = $this->getApiRoutesFromIterator($router);
 
 				foreach ($routes as $route) {
@@ -258,7 +233,6 @@ private function getApiRoutesFromIterator(\IteratorAggregate $i): array
 		return $return;
 	}
 
-
 	private function getHttpAuthSnippet(): string
 	{
 		$user = (string) $this->httpAuth['user'];
@@ -277,4 +251,5 @@ private function getHttpAuthSnippet(): string
 			. "	die('Invalid authentication');"
 			. '} ?>';
 	}
+
 }
diff --git a/src/Starter.php b/src/Starter.php
index ca3a938..f62b1f8 100644
--- a/src/Starter.php
+++ b/src/Starter.php
@@ -1,12 +1,10 @@
-<?php
-
-declare(strict_types=1);
+<?php declare(strict_types = 1);
 
 namespace Contributte\ApiDocu;
 
 use Contributte\ApiRouter\ApiRoute;
-use Nette\Application\IRouter;
 use Nette\Application\Routers\RouteList;
+use Nette\Routing\Router;
 
 class Starter
 {
@@ -14,26 +12,15 @@ class Starter
 	public const API_DOCU_STARTER_QUERY_KEY_TARGET = '__apiDocu';
 	public const API_DOCU_STARTER_QUERY_KEY_GENERATE = '__apiDocuGenerate';
 
-	/**
-	 * @var callable[]
-	 */
-	public $onMatch;
-
-	/**
-	 * @var Generator
-	 */
-	private $generator;
+	/** @var callable[] */
+	public array $onMatch = [];
 
-	/**
-	 * @var IRouter
-	 */
-	private $router;
+	private Generator $generator;
 
+	private Router $router;
 
-	public function __construct(
-		Generator $generator,
-		IRouter $router
-	) {
+	public function __construct(Generator $generator, Router $router)
+	{
 		$this->generator = $generator;
 		$this->router = $router;
 
@@ -42,9 +29,9 @@ public function __construct(
 		}
 	}
 
-
 	/**
 	 * Event thatis firex when particular ApiRoute is matched
+	 *
 	 * @param array<mixed> $parameters
 	 */
 	public function routeMatched(ApiRoute $route, array $parameters): void
@@ -66,7 +53,6 @@ public function routeMatched(ApiRoute $route, array $parameters): void
 		}
 	}
 
-
 	/**
 	 * Find ApiRoutes and add listener to each ApiRoute::onMatch event
 	 */
@@ -78,4 +64,5 @@ protected function attachEvents(RouteList $routeList): void
 			}
 		}
 	}
+
 }
diff --git a/src/TemplateFilters.php b/src/TemplateFilters.php
index 1c7c69f..35b79fe 100644
--- a/src/TemplateFilters.php
+++ b/src/TemplateFilters.php
@@ -1,21 +1,20 @@
-<?php
-
-declare(strict_types=1);
+<?php declare(strict_types = 1);
 
 namespace Contributte\ApiDocu;
 
 class TemplateFilters
 {
+
 	public static function common(string $filter): ?string
 	{
-		if (method_exists(__CLASS__, $filter)) {
+		if (method_exists(self::class, $filter)) {
 			$args = func_get_args();
 			array_shift($args);
 
-			$callback = [__CLASS__, $filter];
+			$callback = [self::class, $filter];
 
 			if (!is_callable($callback)) {
-				throw new \UnexpectedValueException;
+				throw new \UnexpectedValueException();
 			}
 
 			return ($callback)($args);
@@ -30,7 +29,7 @@ public static function common(string $filter): ?string
 	public static function description(array $text): string
 	{
 		$text = reset($text);
-		$text = nl2br($text);
+		$text = nl2br($text); // @phpstan-ignore-line
 		$text = str_replace(["\n", "\n\r", "\r\n", "\r"], '', $text);
 
 		$text = preg_replace_callback('/<json><br \/>(.*?)<\/json>/s', function ($item): string {
@@ -45,4 +44,5 @@ public static function description(array $text): string
 
 		return (string) $text;
 	}
+
 }
diff --git a/tests/Cases/DI/ApiDocuExtension.phpt b/tests/Cases/DI/ApiDocuExtension.phpt
index 2e3cb03..b483a06 100644
--- a/tests/Cases/DI/ApiDocuExtension.phpt
+++ b/tests/Cases/DI/ApiDocuExtension.phpt
@@ -5,6 +5,7 @@ use Contributte\ApiDocu\Generator;
 use Contributte\ApiRouter\DI\ApiRouterExtension;
 use Contributte\Tester\Environment;
 use Contributte\Tester\Toolkit;
+use Contributte\Tester\Utils\Neonkit;
 use Nette\Bridges\ApplicationDI\LatteExtension;
 use Nette\Bridges\HttpDI\HttpExtension;
 use Nette\DI\Compiler;
@@ -29,7 +30,7 @@ Toolkit::test(function (): void {
 				'debugMode' => false,
 			],
 		]);
-		$compiler->addConfig(\Contributte\Tester\Utils\Neonkit::load(<<<'NEON'
+		$compiler->addConfig(Neonkit::load(<<<'NEON'
 		services:
 			router: Nette\Routing\SimpleRouter
 		NEON