diff --git a/Classes/ResourcePusher.php b/Classes/ResourcePusher.php
index 6d53e04..5d7f7c9 100644
--- a/Classes/ResourcePusher.php
+++ b/Classes/ResourcePusher.php
@@ -38,19 +38,6 @@ public function pushAll(array $resources)
         }
     }
 
-    /**
-     * @param array $params
-     * @param TypoScriptFrontendController $typoScriptFrontendController
-     * @internal this is just a hook implementation. can be removed when TYPO3 v9 support is removed.
-     */
-    public function pushForFrontend(array $params, TypoScriptFrontendController $typoScriptFrontendController)
-    {
-        $allResources = $typoScriptFrontendController->config['b13/http2'] ?? null;
-        if ($this->useHook() && GeneralUtility::getIndpEnv('TYPO3_SSL') && is_array($allResources)) {
-            $this->pushAll($allResources);
-        }
-    }
-
     /**
      * as="{style/script/image}"
      *
@@ -61,12 +48,4 @@ protected function addPreloadHeader(string $uri, string $type)
     {
         header('Link: <' . htmlspecialchars(PathUtility::getAbsoluteWebPath($uri)) . '>; rel=preload; as=' . $type, false);
     }
-
-    protected function useHook(): bool
-    {
-        if (class_exists(Typo3Version::class) && (new Typo3Version())->getMajorVersion() >= 10) {
-            return false;
-        }
-        return true;
-    }
 }
diff --git a/README.md b/README.md
index 1ffa292..6deb6db 100644
--- a/README.md
+++ b/README.md
@@ -8,8 +8,8 @@ This TYPO3 extension fetches all CSS and JS resources that are used
 for a page-rendering and sends additional HTTP/2 Headers "Link" for each resource
 resulting in a faster first contentful paint for TYPO3 CMS.
 
-This extension currently runs on TYPO3 v7, TYPO3 v8, TYPO3 v9, TYPO3 v10 and TYPO3 v11,
-and needs PHP 7.0 or higher.
+This extension currently runs on TYPO3 v10, TYPO3 v11 and TYPO3 v12,
+and needs PHP 7.4 or higher.
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index bab14fb..6d8ffa3 100644
--- a/composer.json
+++ b/composer.json
@@ -3,10 +3,10 @@
 	"type": "typo3-cms-extension",
 	"description": "Speed up TYPO3 rendering via HTTP/2 Server Push",
 	"require": {
-		"php": "^7.0 || ^8.0",
+		"php": "^7.4 || ^8.0",
 		"psr/http-server-middleware": "^1.0",
-		"typo3/cms-core": "^7.6 || ^8.7 || ^9.5 || ^10.0 || ^11.0",
-		"typo3/cms-frontend": "^7.6 || ^8.7 || ^9.5 || ^10.0 || ^11.0"
+		"typo3/cms-core": "^10.0 || ^11.0 || ^12.0",
+		"typo3/cms-frontend": "^10.0 || ^11.0 || ^12.0"
 	},
 	"require-dev": {
 		"phpunit/phpunit": "~7.0",
diff --git a/ext_emconf.php b/ext_emconf.php
index 407263a..487458a 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -4,7 +4,7 @@
     'title' => 'HTTP2 Server Push Support for TYPO3',
     'description' => '',
     'category' => 'extension',
-    'version' => '1.1.1',
+    'version' => '2.0.0',
     'state' => 'stable',
     'clearcacheonload' => 1,
     'author' => 'b13 GmbH',
@@ -12,7 +12,7 @@
     'author_company' => 'b13 GmbH',
     'constraints' => [
         'depends' => [
-            'typo3' => '7.6.0-11.99.99',
+            'typo3' => '10.4.0-12.99.99',
         ],
     ],
 ];
diff --git a/ext_localconf.php b/ext_localconf.php
index 9fccf8a..083208c 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -1,7 +1,4 @@
 <?php
-defined('TYPO3_MODE') or die();
+defined('TYPO3') or die();
 
 $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_pagerenderer.php']['render-postProcess']['b13/http2'] = B13\Http2\PageRendererHook::class . '->accumulateResources';
-
-// can be removed as soon as TYPO3 v9 support is dropped, as this is now taken care of by a middleware
-$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['contentPostProc-output']['b13/http2'] = B13\Http2\ResourcePusher::class . '->pushForFrontend';