diff --git a/src/Api.php b/src/Api.php
index 3c7cf1f..399c6a8 100644
--- a/src/Api.php
+++ b/src/Api.php
@@ -11,8 +11,6 @@
 
 final class Api
 {
-	private string $basePath;
-
 	/** @var mixed[] */
 	private array $data;
 
@@ -22,8 +20,6 @@ final class Api
 	/** @var string[] */
 	private array $formatHtmlInjects;
 
-	private Minifier $minifier;
-
 
 	/**
 	 * @param mixed[] $data
@@ -31,17 +27,15 @@ final class Api
 	 * @param string[] $formatHtmlInjects
 	 */
 	public function __construct(
-		string $basePath,
+		private string $basePath,
 		array $data,
 		array $formatHeaders,
 		array $formatHtmlInjects,
-		Minifier $minifier
+		private Minifier $minifier
 	) {
-		$this->basePath = $basePath;
 		$this->data = $data;
 		$this->formatHeaders = $formatHeaders;
 		$this->formatHtmlInjects = $formatHtmlInjects;
-		$this->minifier = $minifier;
 	}
 
 
@@ -205,7 +199,7 @@ private function findGlobalData(string $route): array
 	 */
 	private function findDataBySelectors(array $selectors): array
 	{
-		$selectors = array_map(fn(string $item): string => trim($item, ':'), $selectors);
+		$selectors = array_map(static fn(string $item): string => trim($item, ':'), $selectors);
 		$return = [];
 		foreach (array_unique($selectors) as $selector) {
 			$return[] = $this->data[$selector] ?? [];
diff --git a/src/AssetLoaderException.php b/src/AssetLoaderException.php
index aeb2032..7d59785 100644
--- a/src/AssetLoaderException.php
+++ b/src/AssetLoaderException.php
@@ -7,12 +7,4 @@
 
 final class AssetLoaderException extends \RuntimeException
 {
-	public static function routeIsInInvalidFormat(string $route): void
-	{
-		throw new self(
-			'Route "' . $route . '" is invalid. '
-			. 'Route must be absolute "Module:Presenter:action" or end '
-			. 'with dynamic part in format "Module:*" or "Module:Presenter:*".',
-		);
-	}
 }
diff --git a/src/LoaderExtension.php b/src/LoaderExtension.php
index b3b78a2..40b2f47 100644
--- a/src/LoaderExtension.php
+++ b/src/LoaderExtension.php
@@ -108,7 +108,11 @@ private function validateRouteFormat(string $route): void
 			return;
 		}
 		if (preg_match('/^[A-Z0-9][A-Za-z0-9]*:(?:\*|[A-Z0-9][A-Za-z0-9]*:(?:\*|[a-z0-9][A-Za-z0-9]*))$/', trim($route, ':')) === 0) {
-			AssetLoaderException::routeIsInInvalidFormat($route);
+			throw new AssetLoaderException(
+				'Route "' . $route . '" is invalid. '
+				. 'Route must be absolute "Module:Presenter:action" or end '
+				. 'with dynamic part in format "Module:*" or "Module:Presenter:*".',
+			);
 		}
 	}
 }
diff --git a/src/Minifier/DefaultCssMinifier.php b/src/Minifier/DefaultCssMinifier.php
index 1f0595e..590b137 100644
--- a/src/Minifier/DefaultCssMinifier.php
+++ b/src/Minifier/DefaultCssMinifier.php
@@ -11,7 +11,7 @@ public function minify(string $haystack): string
 	{
 		$return = (string) preg_replace_callback(
 			'#[ \t\r\n]+|<(/)?(textarea|pre)(?=\W)#i',
-			fn(array $match): string => empty($match[2]) ? ' ' : $match[0],
+			static fn(array $match): string => empty($match[2]) ? ' ' : $match[0],
 			$haystack,
 		);
 		$return = (string) preg_replace('/(\w|;)\s+({|})\s+(\w|\.|#)/', '$1$2$3', $return);