diff --git a/Kununu/ArchitectureSniffer/Helper/ProjectPathResolver.php b/Kununu/ArchitectureSniffer/Helper/ProjectPathResolver.php
index f087f74..b771e20 100644
--- a/Kununu/ArchitectureSniffer/Helper/ProjectPathResolver.php
+++ b/Kununu/ArchitectureSniffer/Helper/ProjectPathResolver.php
@@ -5,7 +5,7 @@
 
 final readonly class ProjectPathResolver
 {
-    protected static function getProjectDirectory(): string
+    private static function getProjectDirectory(): string
     {
         $directory = dirname(__DIR__);
 
diff --git a/composer.json b/composer.json
index 018a54e..41d4625 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "friendsofphp/php-cs-fixer": "^3.75",
         "rector/rector": "^2.0",
         "squizlabs/php_codesniffer": "^3.10",
-        "symfony/yaml": "^6.4"
+        "symfony/yaml": "^6.4 || ^7.4"
     },
     "require-dev": {
         "phpunit/phpunit": "^11.5"
diff --git a/tests/Unit/Kununu/CsFixer/Command/CsFixerCommandTest.php b/tests/Unit/Kununu/CsFixer/Command/CsFixerCommandTest.php
index fcb92eb..0c6ef34 100644
--- a/tests/Unit/Kununu/CsFixer/Command/CsFixerCommandTest.php
+++ b/tests/Unit/Kununu/CsFixer/Command/CsFixerCommandTest.php
@@ -44,7 +44,7 @@ public static function fixerCasesProvider(): array
 
         $cases = require $casesFile;
 
-        return array_map(fn($case) => [$case['before'], $case['after']], $cases);
+        return array_map(static fn($case) => [$case['before'], $case['after']], $cases);
     }
 
     private function contents(string $file): string
diff --git a/tests/Unit/Kununu/CsFixer/_data/fixer_test_cases.php b/tests/Unit/Kununu/CsFixer/_data/fixer_test_cases.php
index cbba18b..8080854 100644
--- a/tests/Unit/Kununu/CsFixer/_data/fixer_test_cases.php
+++ b/tests/Unit/Kununu/CsFixer/_data/fixer_test_cases.php
@@ -171,7 +171,7 @@ class FnSpacing
 {
     public function doStuff()
     {
-        $fn = function($x) {
+        $fn = static function($x) {
             return $x;
         };