diff --git a/.gitattributes b/.gitattributes
index 1e89265..3f1189b 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -16,22 +16,22 @@
 *.yml  text
 
 # Ensure those won't be messed up with
+*.phar binary
 *.png  binary
 *.jpg  binary
 *.gif  binary
 *.ttf  binary
 
-# Ignore some meta files when creating an archive of this repository
-/.github                export-ignore
-/.editorconfig          export-ignore
-/.gitattributes         export-ignore
-/.gitignore             export-ignore
-/.phpunit-watcher.yml   export-ignore
-/.styleci.yml           export-ignore
-/infection.json.dist    export-ignore
-/phpunit.xml.dist       export-ignore
-/psalm.xml              export-ignore
-/docs                   export-ignore
+# Exclude development and metadata files from distribution archive
+*               export-ignore
+/src/          -export-ignore
+/src/**        -export-ignore
+/tests/        -export-ignore
+/tests/**      -export-ignore
+/composer.json -export-ignore
+/README.md     -export-ignore
+/CHANGELOG.md  -export-ignore
+/LICENSE.md    -export-ignore
 
 # Avoid merge conflicts in CHANGELOG
 # https://about.gitlab.com/2015/02/10/gitlab-reduced-merge-conflicts-by-90-percent-with-changelog-placeholders/
diff --git a/.github/workflows/mutation.yml b/.github/workflows/mutation.yml
index c691b45..6677094 100644
--- a/.github/workflows/mutation.yml
+++ b/.github/workflows/mutation.yml
@@ -28,6 +28,6 @@ jobs:
         ['ubuntu-latest']
       php: >-
         ['8.5']
-      min-covered-msi: 100
+      infection-args: "--ignore-msi-with-no-mutations --min-covered-msi=100"
     secrets:
       STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
diff --git a/.gitignore b/.gitignore
index 8c3d8ad..f1fb048 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,12 +22,10 @@ Thumbs.db
 # composer itself is not needed
 composer.phar
 
-# phpunit itself is not needed
-phpunit.phar
-# local phpunit config
+# PhpUnit
+/phpunit.phar
 /phpunit.xml
-# phpunit cache
-/.phpunit.cache/*
+/.phpunit.cache
 
 # PHP CS Fixer
 /.php-cs-fixer.cache
diff --git a/composer.json b/composer.json
index e5ebb99..606bd9a 100644
--- a/composer.json
+++ b/composer.json
@@ -37,10 +37,10 @@
     },
     "require-dev": {
         "bamarni/composer-bin-plugin": "^1.8.3",
-        "friendsofphp/php-cs-fixer": "^3.89.2",
+        "friendsofphp/php-cs-fixer": "^3.91.3",
         "maglnet/composer-require-checker": "^4.7.1",
-        "phpunit/phpunit": "^10.5.52",
-        "rector/rector": "^2.2.8",
+        "phpunit/phpunit": "^10.5.60",
+        "rector/rector": "^2.2.14",
         "spatie/phpunit-watcher": "^1.24"
     },
     "autoload": {
diff --git a/rector.php b/rector.php
index dd88e1b..54537c2 100644
--- a/rector.php
+++ b/rector.php
@@ -6,24 +6,19 @@
 use Rector\Config\RectorConfig;
 use Rector\Php74\Rector\Closure\ClosureToArrowFunctionRector;
 use Rector\Php81\Rector\Property\ReadOnlyPropertyRector;
-use Rector\Set\ValueObject\LevelSetList;
+use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
 
-return static function (RectorConfig $rectorConfig): void {
-    $rectorConfig->paths([
+return RectorConfig::configure()
+    ->withPaths([
         __DIR__ . '/src',
         __DIR__ . '/tests',
-    ]);
-
-    // register a single rule
-    $rectorConfig->rule(InlineConstructorDefaultToPropertyRector::class);
-
-    // define sets of rules
-    $rectorConfig->sets([
-        LevelSetList::UP_TO_PHP_81,
-    ]);
-
-    $rectorConfig->skip([
+    ])
+    ->withPhpSets(php81: true)
+    ->withRules([
+        InlineConstructorDefaultToPropertyRector::class,
+    ])
+    ->withSkip([
         ClosureToArrowFunctionRector::class,
         ReadOnlyPropertyRector::class,
+        NullToStrictStringFuncCallArgRector::class,
     ]);
-};
diff --git a/tools/infection/composer.json b/tools/infection/composer.json
index 18be2ea..863d41f 100644
--- a/tools/infection/composer.json
+++ b/tools/infection/composer.json
@@ -1,6 +1,6 @@
 {
     "require-dev": {
-        "infection/infection": "^0.26 || ^0.31.9"
+        "infection/infection": "^0.26.21 || ^0.31.9"
     },
     "config": {
         "allow-plugins": {
diff --git a/tools/psalm/composer.json b/tools/psalm/composer.json
index cfbd3f4..b048ebf 100644
--- a/tools/psalm/composer.json
+++ b/tools/psalm/composer.json
@@ -1,5 +1,5 @@
 {
     "require-dev": {
-        "vimeo/psalm": "^5.26.1 || ^6.10.3"
+        "vimeo/psalm": "^6.14.1"
     }
 }