diff --git a/Build/sites/main/config.yaml b/Build/sites/main/config.yaml
new file mode 100644
index 0000000..f1cfaaa
--- /dev/null
+++ b/Build/sites/main/config.yaml
@@ -0,0 +1,20 @@
+base: 'http://localhost/'
+baseVariants: {  }
+errorHandling: {  }
+languages:
+  -
+    title: english
+    enabled: true
+    base: /
+    typo3Language: default
+    locale: en_US.UTF-8
+    iso-639-1: en
+    navigationTitle: ''
+    hreflang: ''
+    direction: ''
+    flag: global
+    languageId: '0'
+    websiteTitle: ''
+rootPageId: 1
+routes: {  }
+websiteTitle: 'Testing'
diff --git a/Classes/AssetCollector.php b/Classes/AssetCollector.php
index 0cc3857..448d953 100644
--- a/Classes/AssetCollector.php
+++ b/Classes/AssetCollector.php
@@ -1,5 +1,6 @@
 <?php
-declare(strict_types = 1);
+
+declare(strict_types=1);
 namespace B13\Assetcollector;
 
 /*
@@ -10,51 +11,23 @@
  * of the License, or any later version.
  */
 
+use B13\Assetcollector\Resource\ResourceCompressor;
 use TYPO3\CMS\Core\SingletonInterface;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
-use B13\Assetcollector\Resource\ResourceCompressor;
 use TYPO3\CMS\Core\Utility\PathUtility;
-use TYPO3\CMS\Extbase\Object\ObjectManager;
-use TYPO3\CMS\Extbase\Configuration\ConfigurationManager;
-use TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface;
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
 
 /**
  * Main collector class to be used everywhere
  */
 class AssetCollector implements SingletonInterface
 {
-    /**
-     * @var array
-     */
-    protected $inlineCss = [];
-
-    /**
-     * @var array
-     */
-    protected $cssFiles = [];
-
-    /**
-     * Array of JS files which are appended in script tag in head element.
-     * @var array
-     */
-    protected $jsFiles = [];
-
-    /**
-     * @var array
-     */
-    protected $xmlFiles = [];
-
-    /**
-     * Array of CSS files which are appended in link tag in head element.
-     *
-     * @var array
-     */
-    protected $externalCssFiles = [];
-
-    /**
-     * @var ?array
-     */
-    protected $typoScriptConfiguration = null;
+    protected array $inlineCss = [];
+    protected array $cssFiles = [];
+    protected array $jsFiles = [];
+    protected array $xmlFiles = [];
+    protected array $externalCssFiles = [];
+    protected ?array $typoScriptConfiguration = null;
 
     public function addInlineCss(string $inlineCss): void
     {
@@ -66,10 +39,6 @@ public function addCssFile(string $cssFile): void
         $this->cssFiles[] = GeneralUtility::getFileAbsFileName($cssFile);
     }
 
-    /**
-     * @param string $fileName
-     * @param string $mediaType
-     */
     public function addExternalCssFile(string $fileName, string $mediaType = 'all'): void
     {
         // Only add external css file if not added already.
@@ -94,7 +63,7 @@ public function addJavaScriptFile(string $fileName, array $additionalAttributes
         }
         $this->jsFiles[] = [
             'fileName' => $fileName,
-            'additionalAttributes' => $additionalAttributes
+            'additionalAttributes' => $additionalAttributes,
         ];
     }
 
@@ -161,9 +130,8 @@ public function buildInlineCssTag(): string
         if (trim($inlineCss) !== '') {
             $compressor = GeneralUtility::makeInstance(ResourceCompressor::class);
             return '<style class="tx_assetcollector">' . $compressor->publicCompressCssString($inlineCss) . '</style>';
-        } else {
-            return '';
         }
+        return '';
     }
 
     public function buildJavaScriptIncludes(): string
@@ -196,7 +164,6 @@ public function buildInlineXmlTag(): string
         $xmlFiles = $this->getUniqueXmlFiles();
         foreach ($xmlFiles as $xmlFile) {
             if (file_exists($xmlFile)) {
-
                 $iconIdentifier = $this->getIconIdentifierFromFileName($xmlFile);
                 $svgInline = '';
                 $xmlContent = new \DOMDocument();
@@ -214,7 +181,6 @@ public function buildInlineXmlTag(): string
                 $inlineXml .= '<symbol id="icon-' . $iconIdentifier . '"' . $viewBoxAttribute . '>'
                               . $svgInline
                               . '</symbol>';
-
             }
         }
         if (trim($inlineXml) !== '') {
@@ -223,9 +189,8 @@ public function buildInlineXmlTag(): string
                    . '<defs>'
                    . $inlineXml
                    . '</defs></svg>';
-        } else {
-            return '';
         }
+        return '';
     }
 
     protected function removeUtf8Bom(string $text): string
@@ -254,23 +219,18 @@ public function getTypoScriptValue(string $name): string
 
     protected function loadTypoScript(): void
     {
-        $this->typoScriptConfiguration = $this->getExtbaseFrameworkConfiguration() ?? [];
+        $this->typoScriptConfiguration = [];
+        $frontendController = $this->getTypoScriptFrontendController();
+        if ($frontendController !== null) {
+            $this->typoScriptConfiguration = $frontendController->tmpl->setup['plugin.']['tx_assetcollector.']['icons.'] ?? [];
+        }
     }
 
-    protected function getExtbaseFrameworkConfiguration(): ?array
+    protected function getTypoScriptFrontendController(): ?TypoScriptFrontendController
     {
-        $objectManager = GeneralUtility::makeInstance(ObjectManager::class);
-        $configurationManager = $objectManager->get(ConfigurationManager::class);
-        try {
-            $extbaseFrameworkConfiguration = $configurationManager->getConfiguration(ConfigurationManagerInterface::CONFIGURATION_TYPE_FULL_TYPOSCRIPT);
-            if (is_array($extbaseFrameworkConfiguration['plugin.']['tx_assetcollector.']['icons.'])) {
-                return $extbaseFrameworkConfiguration['plugin.']['tx_assetcollector.']['icons.'];
-            }
-        } catch (\TYPO3\CMS\Extbase\Configuration\Exception\InvalidConfigurationTypeException $e) {
-
+        if (($GLOBALS['TSFE'] ?? null) instanceof TypoScriptFrontendController) {
+            return $GLOBALS['TSFE'];
         }
         return null;
-
     }
-
 }
diff --git a/Classes/Hooks/AssetRenderer.php b/Classes/Hooks/AssetRenderer.php
index c280319..96b7d60 100644
--- a/Classes/Hooks/AssetRenderer.php
+++ b/Classes/Hooks/AssetRenderer.php
@@ -1,5 +1,6 @@
 <?php
-declare(strict_types = 1);
+
+declare(strict_types=1);
 namespace B13\Assetcollector\Hooks;
 
 /*
@@ -35,7 +36,6 @@
  */
 class AssetRenderer implements SingletonInterface
 {
-
     /**
      * Called via PageRenderer->render-postProcess(). Get this:
      *
@@ -134,7 +134,7 @@ public function collectInlineAssets($params, TypoScriptFrontendController $front
             'jsFiles' => $assetCollector->getJavaScriptFiles(),
             'cssFiles' => $assetCollector->getUniqueCssFiles(),
             'inlineCss' => $assetCollector->getUniqueInlineCss(),
-            'xmlFiles' => $assetCollector->getUniqueXmlFiles()
+            'xmlFiles' => $assetCollector->getUniqueXmlFiles(),
         ];
         $frontendController->config['b13/assetcollector'] = $cached;
     }
@@ -158,8 +158,7 @@ protected function getTypoScriptFrontendController(): ?TypoScriptFrontendControl
     {
         if (($GLOBALS['TSFE'] ?? null) instanceof TypoScriptFrontendController) {
             return $GLOBALS['TSFE'];
-        } else {
-            return null;
         }
+        return null;
     }
 }
diff --git a/Classes/Listener/AfterCacheableContentIsGenerated.php b/Classes/Listener/AfterCacheableContentIsGenerated.php
new file mode 100644
index 0000000..3524af4
--- /dev/null
+++ b/Classes/Listener/AfterCacheableContentIsGenerated.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace B13\Assetcollector\Listener;
+
+/*
+ * This file is part of TYPO3 CMS-based extension "assetcollector" by b13.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ */
+
+use B13\Assetcollector\Hooks\AssetRenderer;
+use TYPO3\CMS\Frontend\Event\AfterCacheableContentIsGeneratedEvent;
+
+class AfterCacheableContentIsGenerated
+{
+    protected AssetRenderer $assetRenderer;
+
+    public function __construct(AssetRenderer $assetRenderer)
+    {
+        $this->assetRenderer = $assetRenderer;
+    }
+
+    public function __invoke(AfterCacheableContentIsGeneratedEvent $event)
+    {
+        $frontendController = $event->getController();
+        $this->assetRenderer->collectInlineAssets([], $frontendController);
+    }
+}
diff --git a/Classes/Middleware/InlineSvgInjector.php b/Classes/Middleware/InlineSvgInjector.php
index d93344d..36da02c 100644
--- a/Classes/Middleware/InlineSvgInjector.php
+++ b/Classes/Middleware/InlineSvgInjector.php
@@ -1,5 +1,6 @@
 <?php
-declare(strict_types = 1);
+
+declare(strict_types=1);
 namespace B13\Assetcollector\Middleware;
 
 /*
@@ -11,14 +12,14 @@
  */
 
 use B13\Assetcollector\AssetCollector;
-use Psr\Http\Server\MiddlewareInterface;
-use TYPO3\CMS\Core\Utility\GeneralUtility;
-use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
 use Psr\Http\Server\RequestHandlerInterface;
 use TYPO3\CMS\Core\Http\NullResponse;
 use TYPO3\CMS\Core\Http\Stream;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
 
 /**
  * Middleware to add inline SVGs at the end of the HTML <body> tag.
@@ -47,7 +48,6 @@ public function process(ServerRequestInterface $request, RequestHandlerInterface
                 $body->write($content);
                 $response = $response->withBody($body);
             }
-
         }
         return $response;
     }
@@ -82,5 +82,4 @@ protected function getTypoScriptFrontendController(): ?TypoScriptFrontendControl
     {
         return $GLOBALS['TSFE'] ?? null;
     }
-
 }
diff --git a/Classes/Resource/ResourceCompressor.php b/Classes/Resource/ResourceCompressor.php
index 38bb3db..7be6119 100644
--- a/Classes/Resource/ResourceCompressor.php
+++ b/Classes/Resource/ResourceCompressor.php
@@ -1,5 +1,6 @@
 <?php
-declare(strict_types = 1);
+
+declare(strict_types=1);
 namespace B13\Assetcollector\Resource;
 
 /*
@@ -14,12 +15,8 @@
  * This new class is used to allow to separately compress CSS code, which is not possible
  * by directly using TYPO3 Core.
  */
-class ResourceCompressor extends \TYPO3\CMS\Core\Resource\ResourceCompressor {
-
-    /**
-     * @param $content
-     * @return string
-     */
+class ResourceCompressor extends \TYPO3\CMS\Core\Resource\ResourceCompressor
+{
     public function publicCompressCssString(string $content): string
     {
         return $this->compressCssString($content);
diff --git a/Classes/ViewHelpers/CssViewHelper.php b/Classes/ViewHelpers/CssViewHelper.php
index 4291553..8946ace 100644
--- a/Classes/ViewHelpers/CssViewHelper.php
+++ b/Classes/ViewHelpers/CssViewHelper.php
@@ -1,5 +1,6 @@
 <?php
-declare(strict_types = 1);
+
+declare(strict_types=1);
 namespace B13\Assetcollector\ViewHelpers;
 
 /*
@@ -18,15 +19,9 @@
  */
 class CssViewHelper extends AbstractViewHelper
 {
-    /**
-     * @var AssetCollector
-     */
-    protected $assetCollector;
+    protected AssetCollector $assetCollector;
 
-    /**
-     * @param AssetCollector $assetCollector
-     */
-    public function injectAssetCollector(AssetCollector $assetCollector): void
+    public function __construct(AssetCollector $assetCollector)
     {
         $this->assetCollector = $assetCollector;
     }
@@ -44,7 +39,6 @@ public function initializeArguments(): void
             'external',
             'boolean',
             'Specifies if the given CSS file should be loaded within link tag.'
-
         );
         $this->registerArgument(
             'media',
diff --git a/Classes/ViewHelpers/JsViewHelper.php b/Classes/ViewHelpers/JsViewHelper.php
index 214a7c0..a473647 100644
--- a/Classes/ViewHelpers/JsViewHelper.php
+++ b/Classes/ViewHelpers/JsViewHelper.php
@@ -1,5 +1,6 @@
 <?php
-declare(strict_types = 1);
+
+declare(strict_types=1);
 namespace B13\Assetcollector\ViewHelpers;
 
 /*
@@ -15,24 +16,13 @@
 
 class JsViewHelper extends AbstractViewHelper
 {
+    protected AssetCollector $assetCollector;
 
-    /**
-     * @var AssetCollector
-     */
-    protected $assetCollector;
-
-    /**
-     * @param AssetCollector $assetCollector
-     */
-    public function injectAssetCollector(AssetCollector $assetCollector): void
+    public function __construct(AssetCollector $assetCollector)
     {
         $this->assetCollector = $assetCollector;
     }
 
-    /**
-     * @return void
-     * @api
-     */
     public function initializeArguments(): void
     {
         parent::initializeArguments();
@@ -51,16 +41,12 @@ public function initializeArguments(): void
         );
     }
 
-    /**
-     * @return void
-     */
     public function render(): void
     {
         if (!empty($this->arguments['file'])) {
             $this->assetCollector->addJavaScriptFile($this->arguments['file'], $this->arguments['additionalAttributes']);
-        } else {
-            // @todo
-            // $this->assetCollector->addInlineJavaScript($this->renderChildren());
         }
+        // @todo
+        // $this->assetCollector->addInlineJavaScript($this->renderChildren());
     }
 }
diff --git a/Classes/ViewHelpers/SvgViewHelper.php b/Classes/ViewHelpers/SvgViewHelper.php
index 2ce0f37..f1130c1 100644
--- a/Classes/ViewHelpers/SvgViewHelper.php
+++ b/Classes/ViewHelpers/SvgViewHelper.php
@@ -1,5 +1,6 @@
 <?php
-declare(strict_types = 1);
+
+declare(strict_types=1);
 namespace B13\Assetcollector\ViewHelpers;
 
 /*
@@ -11,7 +12,6 @@
  */
 
 use B13\Assetcollector\AssetCollector;
-use TYPO3\CMS\Extbase\Utility\DebuggerUtility;
 use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractTagBasedViewHelper;
 
 /**
@@ -24,23 +24,13 @@ class SvgViewHelper extends AbstractTagBasedViewHelper
      */
     protected $tagName = 'svg';
 
-    /**
-     * @var AssetCollector
-     */
-    protected $assetCollector;
+    protected AssetCollector $assetCollector;
 
-    /**
-     * @param AssetCollector $assetCollector
-     */
-    public function injectAssetCollector(AssetCollector $assetCollector): void
+    public function __construct(AssetCollector $assetCollector)
     {
         $this->assetCollector = $assetCollector;
     }
 
-    /**
-     * @return void
-     * @api
-     */
     public function initializeArguments(): void
     {
         parent::initializeArguments();
@@ -59,9 +49,6 @@ public function initializeArguments(): void
         );
     }
 
-    /**
-     * @return String rendered tag
-     */
     public function render(): string
     {
         $file = '';
@@ -83,6 +70,5 @@ public function render(): string
         $this->tag->setContent($content);
 
         return $this->tag->render();
-
     }
 }
diff --git a/Configuration/RequestMiddlewares.php b/Configuration/RequestMiddlewares.php
index d93046b..dcce005 100644
--- a/Configuration/RequestMiddlewares.php
+++ b/Configuration/RequestMiddlewares.php
@@ -1,11 +1,12 @@
 <?php
+
 return [
     'frontend' => [
         'b13/assetcollector' => [
             'target' => \B13\Assetcollector\Middleware\InlineSvgInjector::class,
             'after' => [
-                'typo3/cms-frontend/content-length-headers'
-            ]
-        ]
-    ]
+                'typo3/cms-frontend/content-length-headers',
+            ],
+        ],
+    ],
 ];
diff --git a/Configuration/Services.yaml b/Configuration/Services.yaml
new file mode 100644
index 0000000..2414f95
--- /dev/null
+++ b/Configuration/Services.yaml
@@ -0,0 +1,13 @@
+services:
+  _defaults:
+    autowire: true
+    autoconfigure: true
+    public: false
+
+  B13\Assetcollector\:
+    resource: '../Classes/*'
+
+  B13\Assetcollector\Listener\AfterCacheableContentIsGenerated:
+    tags:
+      - name: event.listener
+        identifier: 'b13-assetcollector-after-cacheable-content-is-generated'
\ No newline at end of file
diff --git a/Tests/Functional/Frontend/AbstractFrontendTest.php b/Tests/Functional/Frontend/AbstractFrontendTest.php
new file mode 100644
index 0000000..f130ff9
--- /dev/null
+++ b/Tests/Functional/Frontend/AbstractFrontendTest.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace B13\Assetcollector\Tests\Functional\Functional;
+
+/*
+ * This file is part of TYPO3 CMS-based extension "assetcollector" by b13.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ */
+
+use Psr\Http\Message\ResponseInterface;
+use TYPO3\CMS\Core\Information\Typo3Version;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\TestingFramework\Core\Functional\Framework\Frontend\InternalRequest;
+use TYPO3\TestingFramework\Core\Functional\Framework\Frontend\InternalRequestContext;
+use TYPO3\TestingFramework\Core\Functional\FunctionalTestCase;
+
+abstract class AbstractFrontendTest extends FunctionalTestCase
+{
+    protected array $testExtensionsToLoad = ['typo3conf/ext/assetcollector'];
+    protected array $coreExtensionsToLoad = ['core', 'frontend'];
+    protected array $pathsToLinkInTestInstance = ['typo3conf/ext/assetcollector/Build/sites' => 'typo3conf/sites'];
+
+    protected function executeFrontendRequestWrapper(InternalRequest $request, InternalRequestContext $context = null, bool $followRedirects = false): ResponseInterface
+    {
+        if ((GeneralUtility::makeInstance(Typo3Version::class))->getMajorVersion() < 11) {
+            return $this->executeFrontendRequest($request, $context, $followRedirects);
+        }
+        return $this->executeFrontendSubRequest($request, $context, $followRedirects);
+    }
+}
diff --git a/Tests/Functional/Frontend/Fixtures/Templates/InlineCss.html b/Tests/Functional/Frontend/Fixtures/Templates/InlineCss.html
new file mode 100644
index 0000000..be3577d
--- /dev/null
+++ b/Tests/Functional/Frontend/Fixtures/Templates/InlineCss.html
@@ -0,0 +1,9 @@
+<html
+    xmlns:f="http://typo3.org/ns/TYPO3/CMS/Fluid/ViewHelpers"
+    xmlns:ac="http://typo3.org/ns/B13/Assetcollector/ViewHelpers"
+    data-namespace-typo3-fluid="true"
+>
+<f:spaceless>
+  <ac:css>h1 { color: red; }</ac:css>
+</f:spaceless>
+</html>
diff --git a/Tests/Functional/Frontend/Fixtures/inline_css.csv b/Tests/Functional/Frontend/Fixtures/inline_css.csv
new file mode 100644
index 0000000..854fe5c
--- /dev/null
+++ b/Tests/Functional/Frontend/Fixtures/inline_css.csv
@@ -0,0 +1,10 @@
+"pages"
+,"uid","pid","title","slug"
+,1,0,"root","/"
+"sys_template"
+,"uid","pid","root","config"
+,1,1,1,"page = PAGE
+page.10 = FLUIDTEMPLATE
+page.10.templateRootPaths.10 = EXT:assetcollector/Tests/Functional/Frontend/Fixtures/Templates
+page.10.templateName = InlineCss.html
+"
diff --git a/Tests/Functional/Frontend/InlineCssTest.php b/Tests/Functional/Frontend/InlineCssTest.php
new file mode 100644
index 0000000..812ba32
--- /dev/null
+++ b/Tests/Functional/Frontend/InlineCssTest.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace B13\Assetcollector\Tests\Functional\Functional;
+
+/*
+ * This file is part of TYPO3 CMS-based extension "assetcollector" by b13.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ */
+
+use TYPO3\TestingFramework\Core\Functional\Framework\Frontend\InternalRequest;
+
+class InlineCssTest extends AbstractFrontendTest
+{
+    /**
+     * @test
+     */
+    public function scriptTagForInlineCssIsRendered(): void
+    {
+        $this->importCSVDataSet(ORIGINAL_ROOT . 'typo3conf/ext/assetcollector/Tests/Functional/Frontend/Fixtures/inline_css.csv');
+        $response = $this->executeFrontendRequestWrapper(new InternalRequest('http://localhost/'));
+        $expected = '<style class="tx_assetcollector">h1{color:red;}';
+        $body = (string)$response->getBody();
+        self::assertStringContainsString($expected, $body);
+    }
+}
diff --git a/Tests/Unit/AssetCollectorTest.php b/Tests/Unit/AssetCollectorTest.php
new file mode 100644
index 0000000..7b379b3
--- /dev/null
+++ b/Tests/Unit/AssetCollectorTest.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace B13\Assetcollector\Tests\Unit;
+
+/*
+ * This file is part of TYPO3 CMS-based extension "assetcollector" by b13.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ */
+
+use B13\Assetcollector\AssetCollector;
+use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
+
+class AssetCollectorTest extends UnitTestCase
+{
+    /**
+     * @test
+     */
+    public function buildInlineCssTagTest(): void
+    {
+        $assetCollector = $this->getMockBuilder(AssetCollector::class)
+            ->onlyMethods(['getUniqueInlineCss', 'getUniqueCssFiles'])
+            ->getMock();
+        $assetCollector->expects(self::once())->method('getUniqueCssFiles')->willReturn([]);
+        $assetCollector->expects(self::once())->method('getUniqueInlineCss')->willReturn(['my-inline-css']);
+        $cssTag = $assetCollector->buildInlineCssTag();
+        self::assertStringContainsString('<style class="tx_assetcollector">my-inline-css', $cssTag);
+    }
+}
diff --git a/composer.json b/composer.json
index 3f14cdb..e21c8e0 100644
--- a/composer.json
+++ b/composer.json
@@ -7,10 +7,9 @@
 		"vendor-dir": "build/vendor"
 	},
 	"require": {
-		"php": "^7.2 || ^8.0",
-		"typo3/cms-core": "^9.5 || ^10.0 || ^11.0",
-		"typo3/cms-extbase": "^9.5 || ^10.0 || ^11.0",
-		"typo3/cms-frontend": "^9.5 || ^10.0 || ^11.0"
+		"php": "^7.4 || ^8.0",
+		"typo3/cms-core": "^10.5 || ^11.4 || ^12.0",
+		"typo3/cms-frontend": "^10.5 || ^11.4 || ^12.0"
 	},
 	"extra": {
 		"typo3/cms": {
@@ -23,7 +22,7 @@
 		}
 	},
 	"require-dev": {
-		"typo3/coding-standards": "^0.2.0",
+		"typo3/coding-standards": "^0.5",
 		"typo3/tailor": "^1.1"
 	}
 }
diff --git a/ext_emconf.php b/ext_emconf.php
index b3f4520..d5de8bd 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -1,4 +1,5 @@
 <?php
+
 $EM_CONF[$_EXTKEY] = [
     'title' => 'Asset collector',
     'description' => 'Add CSS and SVG files and strings as inline style tag/inline svg to the html code.',
@@ -7,10 +8,10 @@
     'author' => 'b13 GmbH',
     'author_email' => 'typo3@b13.com',
     'author_company' => 'b13 GmbH, Stuttgart',
-    'version' => '1.6.1',
+    'version' => '2.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '9.5.0-11.9.99',
+            'typo3' => '10.4.0-12.9.99',
         ],
     ],
 ];
diff --git a/ext_localconf.php b/ext_localconf.php
index 48061f2..b09398c 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -1,8 +1,10 @@
 <?php
-if (!defined('TYPO3_MODE')) {
+
+if (!defined('TYPO3')) {
     die('Access denied.');
 }
-
-$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['contentPostProc-all']['b13/assetcollector'] = \B13\Assetcollector\Hooks\AssetRenderer::class . '->collectInlineAssets';
+if ((\TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Information\Typo3Version::class))->getMajorVersion() < 12) {
+    $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['contentPostProc-all']['b13/assetcollector'] = \B13\Assetcollector\Hooks\AssetRenderer::class . '->collectInlineAssets';
+}
 $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_pagerenderer.php']['render-preProcess']['b13/assetcollector'] = \B13\Assetcollector\Hooks\AssetRenderer::class . '->collectCssFiles';
 $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_pagerenderer.php']['render-postProcess']['b13/assetcollector'] = \B13\Assetcollector\Hooks\AssetRenderer::class . '->insertAssets';