diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 69e3afe..ab45988 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -77,7 +77,7 @@ jobs:
         run: "composer test-coverage"
 
       - name: "Run PHP CS Check"
-        run: "PHP_CS_FIXER_IGNORE_ENV=1 composer cs-check"
+        run: "composer cs-check"
 
       - name: "Run PHPStan"
         run: "composer analyze"
@@ -119,7 +119,7 @@ jobs:
         run: "composer test-coverage"
 
       - name: "Run PHP CS Check"
-        run: "PHP_CS_FIXER_IGNORE_ENV=1 composer cs-check"
+        run: "composer cs-check"
 
       - name: "Run PHPStan"
         run: "composer analyze"
@@ -133,4 +133,46 @@ jobs:
       - name: "Run infection"
         env:
           INFECTION_BADGE_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
+        run: "composer infection-ci"
+
+  php84:
+    name: PHP 8.4
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v4"
+        with:
+          fetch-depth: 2
+
+      - name: "Install PHP 8.4"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "8.4"
+
+      - name: "Cache composer packages"
+        uses: "actions/cache@v4"
+        with:
+          path: "vendor"
+          key: "php-composer-locked-php-8.4-${{ hashFiles('**/composer.lock') }}"
+          restore-keys: "php-composer-locked-php-8.3-"
+
+      - name: "Install dependencies with composer"
+        run: "composer install --no-interaction --prefer-dist"
+
+      - name: "Run PHPUnit Tests"
+        run: "composer test-coverage"
+
+      - name: "Run PHP CS Check"
+        run: "PHP_CS_FIXER_IGNORE_ENV=1 composer cs-check"
+
+      - name: "Run PHPStan"
+        run: "composer analyze"
+
+      - name: "Run Psalm"
+        run: "composer psalm"
+
+      - name: "PHP Lint"
+        run: "composer lint"
+
+      - name: "Run infection"
         run: "composer infection-ci"
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index bec9efc..4704602 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 # PHPUnit specific
 .phpunit.result.cache
+.php-cs-fixer.cache
 
 # Composer
 /vendor/
diff --git a/README.md b/README.md
index a464f82..8d9f729 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,9 @@ JMS-Serializer: https://github.com/schmittjoh/serializer
 
 You are also welcome to use the Issue Tracker to set bugs, improvements or upgrade requests.
 
+> Please use the new package https://github.com/Dropelikeit/laravel-responsefactory in the future. The new package contains some new and useful functions!
+This package will only be supported until the end of Laravel 11. Until then, you should use the new package.
+
 ### Installation
 
 ``` composer require dropelikeit/laravel-jms-serializer ```
diff --git a/composer.json b/composer.json
index 4466ba8..9f66d95 100644
--- a/composer.json
+++ b/composer.json
@@ -4,6 +4,7 @@
   "keywords": ["Lumen", "Laravel", "JMS Serializer", "JMS"],
   "minimum-stability": "stable",
   "license": "MIT",
+  "abandoned": "dropelikeit/laravel-responsefactory",
   "authors": [
     {
       "name": "Marcel Strahl",
@@ -44,10 +45,10 @@
     "phpstan/phpstan-phpunit": "^1.3",
     "php-parallel-lint/php-parallel-lint": "^1.3",
     "symfony/cache": "^6.3|^7.0",
-    "vimeo/psalm": "^5.23",
-    "psalm/plugin-laravel": "^2.10",
+    "vimeo/psalm": "^5.0|^6.0",
+    "psalm/plugin-laravel": "^2.11",
     "psalm/plugin-phpunit": "^0.19",
-    "infection/infection": "^0.27.10",
+    "infection/infection": "0.27.10|^0.29.10",
     "laravel/framework": "^10.0|^v11.0"
   },
   "scripts": {
diff --git a/src/Config/Config.php b/src/Config/Config.php
index 116b230..ee3be57 100644
--- a/src/Config/Config.php
+++ b/src/Config/Config.php
@@ -45,8 +45,8 @@ private function __construct(
         array $customHandlers,
     ) {
         $cacheDir = sprintf('%s%s', $cacheDir, self::CACHE_DIR);
-        #Assert::stringNotEmpty($cacheDir);
 
+        // @phpstan-ignore-next-line
         $this->cacheDir = $cacheDir;
         $this->customHandlers = $customHandlers;
     }