diff --git a/.github/workflows/tasks.yml b/.github/workflows/tasks.yml
new file mode 100644
index 0000000..6b25d01
--- /dev/null
+++ b/.github/workflows/tasks.yml
@@ -0,0 +1,34 @@
+name: Tasks
+
+on: [push, pull_request]
+
+jobs:
+  lint-php:
+    name: "php: ${{ matrix.php }} TYPO3: ${{ matrix.typo3 }}"
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php: [ '7.4', '8.0', '8.1' ]
+        typo3: [ '10', '11' ]
+        exclude:
+          - php: '8.0'
+            typo3: '10'
+          - php: '8.1'
+            typo3: '10'
+    steps:
+      - name: Setup PHP with PECL extension
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: ~/.composer/cache/files
+          key: ${{ runner.os }}-${{ matrix.php }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.php }}-composer-
+      - run: composer require typo3/minimal="^${{ matrix.typo3 }}" --dev
+      - run: composer install --no-interaction --no-progress
+      - run: ./vendor/bin/grumphp run --ansi
+
diff --git a/.gitignore b/.gitignore
index 9f11b75..c34116b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
 .idea/
+vendor
+public
+composer.lock
diff --git a/Classes/Middleware/MinifyMiddleware.php b/Classes/Middleware/MinifyMiddleware.php
index be72e0f..947bc3f 100644
--- a/Classes/Middleware/MinifyMiddleware.php
+++ b/Classes/Middleware/MinifyMiddleware.php
@@ -31,6 +31,7 @@ public function process(ServerRequestInterface $request, RequestHandlerInterface
             $html = $body->getContents();
 
             $minifyService = GeneralUtility::makeInstance(MinifyService::class);
+            assert($minifyService instanceof MinifyService);
             $html = $minifyService->minify($html);
             $body = new Stream('php://temp', 'wb+');
             $body->write($html);
@@ -38,5 +39,4 @@ public function process(ServerRequestInterface $request, RequestHandlerInterface
         }
         return $response;
     }
-
 }
diff --git a/composer.json b/composer.json
index 876b313..c84cbbd 100644
--- a/composer.json
+++ b/composer.json
@@ -1,19 +1,42 @@
 {
-  "name": "pluswerk/minify",
-  "type": "typo3-cms-extension",
-  "description": "Pluswerk: Minify - Minifies your html",
-  "homepage": "https://www.pluswerk.ag",
-  "license": "GPL-2.0-or-later",
-  "support": {
-    "source": "https://www.pluswerk.ag"
+  "name" : "pluswerk/minify",
+  "type" : "typo3-cms-extension",
+  "description" : "Pluswerk: Minify - Minifies your html",
+  "homepage" : "https://www.pluswerk.ag",
+  "license" : "GPL-2.0-or-later",
+  "support" : {
+    "source" : "https://github.com/pluswerk/minify"
   },
-  "autoload": {
-    "psr-4": {
-      "Pluswerk\\PlusMinify\\": "Classes/"
+  "autoload" : {
+    "psr-4" : {
+      "Pluswerk\\PlusMinify\\" : "Classes/"
     }
   },
-  "require": {
-    "typo3/cms-core": "^10.4",
-    "voku/html-min": "*"
+  "config": {
+    "allow-plugins": {
+      "typo3/cms-composer-installers": true,
+      "typo3/class-alias-loader": true,
+      "phpro/grumphp": true,
+      "pluswerk/grumphp-config": true
+    },
+    "sort-packages": true
+  },
+  "extra" : {
+    "typo3/cms" : {
+      "extension-key" : "minify"
+    },
+    "pluswerk/grumphp-config": {
+      "auto-setting": true
+    },
+    "grumphp": {
+      "config-default-path": "vendor/pluswerk/grumphp-config/grumphp.yml"
+    }
+  },
+  "require" : {
+    "php": "~7.4 || ~8.0 || ~8.1",
+    "composer-runtime-api": "^2",
+    "pluswerk/grumphp-config": "^5.0",
+    "typo3/cms-core": "^10.4 || ^11.5",
+    "voku/html-min": "^4"
   }
 }
diff --git a/ext_emconf.php b/ext_emconf.php
index 601044e..bbedd1a 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -11,11 +11,11 @@
     'internal' => '',
     'uploadfolder' => '0',
     'createDirs' => '',
-    'clearCacheOnLoad' => 0,
-    'version' => '1.1.2',
-    'constraints' =>[
+    'clearCacheOnLoad' => false,
+    'version' => \Composer\InstalledVersions::getPrettyVersion('pluswerk/minify'),
+    'constraints' => [
         'depends' => [
-            'typo3' => '10.99.99',
+            'typo3' => '10.4.0 - 11.99.99',
         ],
         'conflicts' => [],
         'suggests' => [],