diff --git a/composer.json b/composer.json
index da0f141..131cac6 100644
--- a/composer.json
+++ b/composer.json
@@ -25,8 +25,8 @@
     "require":{
         "ext-json": "*",
         "php": "^7.4 || ^8.0",
-        "contao/core-bundle": "^4.9",
-        "symfony/http-client": "^4.4 || ^5.4"
+        "contao/core-bundle": "^4.13 || ^5.1",
+        "symfony/http-client": "^4.4 || ^5.4 || ^6.0"
     },
     "extra": {
         "contao-manager-plugin": "Plenta\\ContaoTinyCompressImages\\ContaoManager\\Plugin"
diff --git a/src/Plenta/ContaoTinyCompressImages/ContaoManager/Plugin.php b/src/Plenta/ContaoTinyCompressImages/ContaoManager/Plugin.php
index 433ca86..1dbce5f 100644
--- a/src/Plenta/ContaoTinyCompressImages/ContaoManager/Plugin.php
+++ b/src/Plenta/ContaoTinyCompressImages/ContaoManager/Plugin.php
@@ -3,7 +3,7 @@
 declare(strict_types=1);
 
 /**
- * @copyright   Copyright (c) 2015-2021, Plenta.io & Christian Barkowsky
+ * @copyright   Copyright (c) 2015-2023, Plenta.io & Christian Barkowsky
  * @author      Christian Barkowsky <hallo@plenta.io>
  * @package     tiny-compress-images
  * @license     LGPL
@@ -17,14 +17,8 @@
 use Contao\ManagerPlugin\Bundle\Parser\ParserInterface;
 use Plenta\ContaoTinyCompressImages\PlentaContaoTinyCompressImagesBundle;
 
-/**
- * Class ContaoManagerPlugin.
- */
 class Plugin implements BundlePluginInterface
 {
-    /**
-     * {@inheritdoc}
-     */
     public function getBundles(ParserInterface $parser): array
     {
         return [
diff --git a/src/Plenta/ContaoTinyCompressImages/Resources/contao/config/config.php b/src/Plenta/ContaoTinyCompressImages/Resources/contao/config/config.php
index c8f87a1..d0f66c9 100644
--- a/src/Plenta/ContaoTinyCompressImages/Resources/contao/config/config.php
+++ b/src/Plenta/ContaoTinyCompressImages/Resources/contao/config/config.php
@@ -3,12 +3,20 @@
 declare(strict_types=1);
 
 /**
- * @copyright   Copyright (c) 2015-2021, Plenta.io & Christian Barkowsky
+ * @copyright   Copyright (c) 2015-2023, Plenta.io & Christian Barkowsky
  * @author      David Greminger <https://github.com/bytehead>
  * @package     tiny-compress-images
  * @license     LGPL
  */
 
-$GLOBALS['BE_MOD']['system']['files'] = array_merge($GLOBALS['BE_MOD']['system']['files'], [
-    'tinify' => ['plenta.contao_tiny_compress_images.listener.data_container', 'onCompress']
-]);
+use Contao\CoreBundle\ContaoCoreBundle;
+
+if (version_compare(ContaoCoreBundle::getVersion(), '5.0', '>=')) {
+    $GLOBALS['BE_MOD']['content']['files'] = array_merge($GLOBALS['BE_MOD']['content']['files'], [
+        'tinify' => ['plenta.contao_tiny_compress_images.listener.data_container', 'onCompress']
+    ]);
+} else {
+    $GLOBALS['BE_MOD']['system']['files'] = array_merge($GLOBALS['BE_MOD']['system']['files'], [
+        'tinify' => ['plenta.contao_tiny_compress_images.listener.data_container', 'onCompress']
+    ]);
+}
diff --git a/src/Plenta/ContaoTinyCompressImages/TinyPNG/Compressor.php b/src/Plenta/ContaoTinyCompressImages/TinyPNG/Compressor.php
index d88f7b4..e73c24c 100644
--- a/src/Plenta/ContaoTinyCompressImages/TinyPNG/Compressor.php
+++ b/src/Plenta/ContaoTinyCompressImages/TinyPNG/Compressor.php
@@ -3,7 +3,7 @@
 declare(strict_types=1);
 
 /**
- * @copyright   Copyright (c) 2015-2022, Plenta.io & Christian Barkowsky
+ * @copyright   Copyright (c) 2015-2023, Plenta.io & Christian Barkowsky
  * @author      Christian Barkowsky <https://github.com/plenta>
  * @author      David Greminger <https://github.com/bytehead>
  * @package     tiny-compress-images
@@ -13,14 +13,15 @@
 namespace Plenta\ContaoTinyCompressImages\TinyPNG;
 
 use Contao\Config;
-use Contao\CoreBundle\Framework\ContaoFramework;
-use Contao\CoreBundle\Monolog\ContaoContext;
-use Contao\FilesModel;
 use Contao\Message;
+use Contao\FilesModel;
 use Psr\Log\LoggerInterface;
-use Symfony\Contracts\HttpClient\Exception\ExceptionInterface;
+use Contao\CoreBundle\ContaoCoreBundle;
+use Contao\CoreBundle\Monolog\ContaoContext;
+use Contao\CoreBundle\Framework\ContaoFramework;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 use Symfony\Contracts\Translation\TranslatorInterface;
+use Symfony\Contracts\HttpClient\Exception\ExceptionInterface;
 
 class Compressor
 {
@@ -85,7 +86,8 @@ public function compress(string $filename): ?FilesModel
             return null;
         }
 
-        if (version_compare(VERSION, '4.13', '>=')) {
+        //if (version_compare(VERSION, '4.13', '>=')) {
+        if (version_compare(ContaoCoreBundle::getVersion(), '4.13', '>=')) {
             $filePath = \Symfony\Component\Filesystem\Path::join($this->projectDir, $file->path);
         } else {
             $filePath = \Webmozart\PathUtil\Path::join($this->projectDir, $file->path);