diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index dbda2ae..d7cf212 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -16,7 +16,7 @@ jobs:
         php-version:
           - 7.2
           - 7.3
-          - 7.4
+          - 8.2
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -37,7 +37,7 @@ jobs:
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.4
+          php-version: 8.2
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -55,7 +55,7 @@ jobs:
         run: composer install --prefer-dist --no-progress --no-suggest
 
       - name: Check CGL
-        run: ./vendor/bin/phpcs
+        run: .Build/vendor/bin/phpcs
 
   check-dependencies:
     runs-on: ubuntu-latest
@@ -66,7 +66,7 @@ jobs:
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.4
+          php-version: 8.2
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -80,14 +80,11 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-composer-
 
-      - name: Keep composer v1 until all dev dependencies are v2 ready
-        run: sudo composer selfupdate --1
-
       - name: Install dependencies
-        run: composer install --prefer-dist --no-progress --no-suggest --no-plugins
+        run: composer require maglnet/composer-require-checker
 
       - name: Missing composer requirements
-        run: ./vendor/bin/composer-require-checker check
+        run: .Build/vendor/bin/composer-require-checker check
 
   xml-linting:
     runs-on: ubuntu-latest
@@ -98,7 +95,7 @@ jobs:
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.4
+          php-version: 8.2
 
       - name: Install xmllint
         run: sudo apt-get install libxml2-utils
@@ -135,8 +132,8 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - 7.3
           - 7.4
+          - 8.2
     steps:
       - uses: actions/checkout@v2
 
@@ -157,14 +154,11 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-composer-
 
-      - name: Keep composer v1 until all dev dependencies are v2 ready
-        run: sudo composer selfupdate --1
-
       - name: Install dependencies
         run: composer install --prefer-dist --no-progress --no-suggest
 
       - name: PHPUnit Tests
-        run: ./vendor/bin/phpunit --testdox
+        run: .Build/vendor/bin/phpunit --testdox
 
   code-quality:
     runs-on: ubuntu-latest
@@ -175,7 +169,7 @@ jobs:
       - name: Install PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.4
+          php-version: 8.2
 
       - name: Get Composer Cache Directory
         id: composer-cache
@@ -193,4 +187,4 @@ jobs:
         run: composer install --prefer-dist --no-progress --no-suggest
 
       - name: Code Quality (by PHPStan)
-        run: ./vendor/bin/phpstan analyse
+        run: .Build/vendor/bin/phpstan analyse
diff --git a/.gitignore b/.gitignore
index 51313d0..e951a59 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
 /.Build/
 /composer.lock
-/vendor/
diff --git a/Classes/Backend/Preview.php b/Classes/Backend/Preview.php
index 2e5a9b0..f13b92e 100644
--- a/Classes/Backend/Preview.php
+++ b/Classes/Backend/Preview.php
@@ -23,6 +23,7 @@ namespace SkillDisplay\SkilldisplayContent\Backend;
  * 02110-1301, USA.
  */
 
+use Exception;
 use SkillDisplay\PHPToolKit\Api\Skill;
 use SkillDisplay\PHPToolKit\Api\SkillSet;
 use TYPO3\CMS\Backend\View\PageLayoutView;
@@ -31,15 +32,8 @@ use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 class Preview implements PageLayoutViewDrawItemHookInterface
 {
-    /**
-     * @var Skill
-     */
-    protected $skillApi;
-
-    /**
-     * @var SkillSet
-     */
-    private $skillSetApi;
+    protected Skill $skillApi;
+    private SkillSet $skillSetApi;
 
     public function __construct(
         Skill $skillApi,
@@ -78,7 +72,7 @@ class Preview implements PageLayoutViewDrawItemHookInterface
         foreach ($skills as $skillId) {
             try {
                 $row['skills'][] = $this->skillApi->getById($skillId);
-            } catch (\Exception $e) {
+            } catch (Exception $e) {
                 $row['skills'][]['error'] = $e->getMessage();
             }
         }
@@ -93,7 +87,7 @@ class Preview implements PageLayoutViewDrawItemHookInterface
         foreach ($skillSets as $skillSetId) {
             try {
                 $row['skillSets'][] = $this->skillSetApi->getById($skillSetId);
-            } catch (\Exception $e) {
+            } catch (Exception $e) {
                 $row['skillSets'][]['error'] = $e->getMessage();
             }
         }
diff --git a/Classes/CampaignsFactory.php b/Classes/CampaignsFactory.php
index 32fef46..5f1da77 100644
--- a/Classes/CampaignsFactory.php
+++ b/Classes/CampaignsFactory.php
@@ -28,15 +28,8 @@ use SkillDisplay\PHPToolKit\Api\Campaigns;
 
 class CampaignsFactory
 {
-    /**
-     * @var SettingsFactory
-     */
-    private $settingsFactory;
-
-    /**
-     * @var Client
-     */
-    private $client;
+    private SettingsFactory $settingsFactory;
+    private Client $client;
 
     public function __construct(
         SettingsFactory $settingsFactory,
diff --git a/Classes/Frontend/DataProcessing/SkillSets.php b/Classes/Frontend/DataProcessing/SkillSets.php
index 34439d1..d8255fb 100644
--- a/Classes/Frontend/DataProcessing/SkillSets.php
+++ b/Classes/Frontend/DataProcessing/SkillSets.php
@@ -23,6 +23,7 @@ namespace SkillDisplay\SkilldisplayContent\Frontend\DataProcessing;
  * 02110-1301, USA.
  */
 
+use Exception;
 use SkillDisplay\PHPToolKit\Api\SkillSet;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
@@ -30,10 +31,7 @@ use TYPO3\CMS\Frontend\ContentObject\DataProcessorInterface;
 
 class SkillSets implements DataProcessorInterface
 {
-    /**
-     * @var SkillSet
-     */
-    protected $skillSetApi;
+    protected SkillSet $skillSetApi;
 
     public function __construct(
         SkillSet $skillSetApi
@@ -50,7 +48,7 @@ class SkillSets implements DataProcessorInterface
         $as = $cObj->stdWrapValue('as', $processorConfiguration, 'skillSets');
         $skillSetIds = GeneralUtility::intExplode(
             ',',
-            $cObj->stdWrapValue('skillSets', $processorConfiguration, ''),
+            $cObj->stdWrapValue('skillSets', $processorConfiguration),
             true
         );
         $skillSets = [];
@@ -58,7 +56,7 @@ class SkillSets implements DataProcessorInterface
         foreach ($skillSetIds as $skillSetId) {
             try {
                 $skillSets[] = $this->skillSetApi->getById($skillSetId);
-            } catch (\Exception $e) {
+            } catch (Exception $e) {
                 continue;
             }
         }
diff --git a/Classes/Frontend/DataProcessing/Skills.php b/Classes/Frontend/DataProcessing/Skills.php
index 6cdfbfe..7ddbc31 100644
--- a/Classes/Frontend/DataProcessing/Skills.php
+++ b/Classes/Frontend/DataProcessing/Skills.php
@@ -23,6 +23,7 @@ namespace SkillDisplay\SkilldisplayContent\Frontend\DataProcessing;
  * 02110-1301, USA.
  */
 
+use Exception;
 use SkillDisplay\PHPToolKit\Api\Skill;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
@@ -30,10 +31,7 @@ use TYPO3\CMS\Frontend\ContentObject\DataProcessorInterface;
 
 class Skills implements DataProcessorInterface
 {
-    /**
-     * @var Skill
-     */
-    protected $skillApi;
+    protected Skill $skillApi;
 
     public function __construct(
         Skill $skillApi
@@ -50,7 +48,7 @@ class Skills implements DataProcessorInterface
         $as = $cObj->stdWrapValue('as', $processorConfiguration, 'skills');
         $skillIds = GeneralUtility::intExplode(
             ',',
-            $cObj->stdWrapValue('skills', $processorConfiguration, ''),
+            $cObj->stdWrapValue('skills', $processorConfiguration),
             true
         );
         $skills = [];
@@ -58,7 +56,7 @@ class Skills implements DataProcessorInterface
         foreach ($skillIds as $skillId) {
             try {
                 $skills[] = $this->skillApi->getById($skillId);
-            } catch (\Exception $e) {
+            } catch (Exception $e) {
                 continue;
             }
         }
diff --git a/Classes/SettingsFactory.php b/Classes/SettingsFactory.php
index 32c4fad..0bbc0ed 100644
--- a/Classes/SettingsFactory.php
+++ b/Classes/SettingsFactory.php
@@ -23,6 +23,7 @@ namespace SkillDisplay\SkilldisplayContent;
  * 02110-1301, USA.
  */
 
+use RuntimeException;
 use SkillDisplay\PHPToolKit\Configuration\Settings;
 use TYPO3\CMS\Core\Http\ServerRequest;
 use TYPO3\CMS\Core\Site\Entity\Site;
@@ -30,10 +31,7 @@ use TYPO3\CMS\Core\Site\SiteFinder;
 
 class SettingsFactory
 {
-    /**
-     * @var SiteFinder
-     */
-    private $siteFinder;
+    private SiteFinder $siteFinder;
 
     public function __construct(
         SiteFinder $siteFinder
@@ -45,7 +43,7 @@ class SettingsFactory
     {
         $site = $this->getRequest()->getAttribute('site');
         if ($site === null) {
-            throw new \Exception('Could not determine current site.', 1599721652);
+            throw new RuntimeException('Could not determine current site.', 1599721652);
         }
 
         return $this->createFromSite($site);
diff --git a/Classes/TcaEnhancer.php b/Classes/TcaEnhancer.php
index 0b37441..8003cdc 100644
--- a/Classes/TcaEnhancer.php
+++ b/Classes/TcaEnhancer.php
@@ -9,10 +9,7 @@ use TYPO3\CMS\Backend\Utility\BackendUtility;
 
 class TcaEnhancer
 {
-    /**
-     * @var CampaignsFactory
-     */
-    private $campaignsFactory;
+    private CampaignsFactory $campaignsFactory;
 
     public function __construct(
         CampaignsFactory $campaignsFactory
diff --git a/Classes/ViewHelpers/VerificationViewHelper.php b/Classes/ViewHelpers/VerificationViewHelper.php
index 467654e..46f1778 100644
--- a/Classes/ViewHelpers/VerificationViewHelper.php
+++ b/Classes/ViewHelpers/VerificationViewHelper.php
@@ -23,6 +23,8 @@ namespace SkillDisplay\SkilldisplayContent\ViewHelpers;
  * 02110-1301, USA.
  */
 
+use Closure;
+use Exception;
 use SkillDisplay\PHPToolKit\Verification\Link;
 use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
 use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
@@ -44,10 +46,14 @@ abstract class VerificationViewHelper extends AbstractViewHelper
 
     public static function renderStatic(
         array $arguments,
-        \Closure $renderChildrenClosure,
+        Closure $renderChildrenClosure,
         RenderingContextInterface $renderingContext
     ) {
-        static::validateIds($arguments);
+        try {
+            static::validateIds($arguments);
+        } catch (Exception $e) {
+            return '';
+        }
 
         return static::verificationHtml($arguments);
     }
@@ -55,22 +61,24 @@ abstract class VerificationViewHelper extends AbstractViewHelper
     abstract protected static function verificationHtml(array $arguments): string;
 
     /**
+     * @param array $arguments
      * @return void
+     * @throws Exception
      */
-    protected static function validateIds(array $arguments)
+    protected static function validateIds(array $arguments): void
     {
         if (
             isset($arguments['skill']) && $arguments['skill'] !== ''
             && isset($arguments['skillSet']) && $arguments['skillSet'] !== ''
         ) {
-            throw new \Exception('Can only handle skill or skillSet not both.', 1600775604);
+            throw new Exception('Can only handle skill or skillSet not both.', 1600775604);
         }
 
         if (
             (isset($arguments['skill']) === false || $arguments['skill'] === '')
             && (isset($arguments['skillSet']) === false || $arguments['skillSet'] === '')
         ) {
-            throw new \Exception('Either needs skill or skillSet, none given.', 1600775604);
+            throw new Exception('Either needs skill or skillSet, none given.', 1600775604);
         }
     }
 
diff --git a/Configuration/TCA/Overrides/sys_template.php b/Configuration/TCA/Overrides/sys_template.php
index 1a12775..da93e2e 100644
--- a/Configuration/TCA/Overrides/sys_template.php
+++ b/Configuration/TCA/Overrides/sys_template.php
@@ -1,9 +1,7 @@
 <?php
 
-(function (string $extensionKey, string $tableName) {
-    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
-        $extensionKey,
-        'Configuration/TypoScript/',
-        'SkillDisplay'
-    );
-})('skilldisplay_content', 'sys_template');
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
+    'skilldisplay_content',
+    'Configuration/TypoScript/',
+    'SkillDisplay'
+);
diff --git a/Configuration/TCA/Overrides/tt_content.php b/Configuration/TCA/Overrides/tt_content.php
index 7c18e0d..343d8c2 100644
--- a/Configuration/TCA/Overrides/tt_content.php
+++ b/Configuration/TCA/Overrides/tt_content.php
@@ -1,9 +1,9 @@
 <?php
 
-(function (string $extensionKey, string $tableName) {
-    $languagePath = 'LLL:EXT:' . $extensionKey . '/Resources/Private/Language/locallang_tca.xlf:' . $tableName . '.';
+(function (string $extensionKey) {
+    $languagePath = 'LLL:EXT:' . $extensionKey . '/Resources/Private/Language/locallang_tca.xlf:tt_content.';
 
-    \TYPO3\CMS\Core\Utility\ArrayUtility::mergeRecursiveWithOverrule($GLOBALS['TCA'][$tableName], [
+    \TYPO3\CMS\Core\Utility\ArrayUtility::mergeRecursiveWithOverrule($GLOBALS['TCA']['tt_content'], [
         'columns' => [
             'CType' => [
                 'config' => [
@@ -13,7 +13,7 @@
                 ],
             ],
             'skilldisplay_skills' => [
-                'exclude' => 1,
+                'exclude' => true,
                 'label' => $languagePath . 'skilldisplay_skills',
                 'description' => $languagePath . 'skilldisplay_skills.description',
                 'config' => [
@@ -23,7 +23,7 @@
                 ],
             ],
             'skilldisplay_skillset' => [
-                'exclude' => 1,
+                'exclude' => true,
                 'label' => $languagePath . 'skilldisplay_skillset',
                 'description' => $languagePath . 'skilldisplay_skillset.description',
                 'config' => [
@@ -33,17 +33,16 @@
                 ],
             ],
             'skilldisplay_campaign' => [
-                'exclude' => 1,
+                'exclude' => true,
                 'label' => $languagePath . 'skilldisplay_campaign',
                 'description' => $languagePath . 'skilldisplay_campaign.description',
                 'config' => [
                     'type' => 'select',
                     'renderType' => 'selectSingle',
-                    'itemsProcFunc' => \SkillDisplay\SkilldisplayContent\TcaEnhancer::class
-                        . '->' . 'getCampaignsForTCA',
+                    'itemsProcFunc' => \SkillDisplay\SkilldisplayContent\TcaEnhancer::class . '->' . 'getCampaignsForTCA',
                     'items' => []
                 ]
             ],
         ],
     ]);
-})('skilldisplay_content', 'tt_content');
+})('skilldisplay_content');
diff --git a/Configuration/TypoScript/setup.typoscript b/Configuration/TypoScript/setup.typoscript
index 868511a..9e94c32 100644
--- a/Configuration/TypoScript/setup.typoscript
+++ b/Configuration/TypoScript/setup.typoscript
@@ -1,4 +1,4 @@
-tt_content.skilldisplay_skills = < lib.contentElement
+tt_content.skilldisplay_skills =< lib.contentElement
 tt_content.skilldisplay_skills {
     templateName = SkillDisplaySkills
 
@@ -10,7 +10,7 @@ tt_content.skilldisplay_skills {
     }
 }
 
-tt_content.skilldisplay_skillset = < lib.contentElement
+tt_content.skilldisplay_skillset =< lib.contentElement
 tt_content.skilldisplay_skillset {
     templateName = SkillDisplaySkillSet
 
@@ -22,8 +22,3 @@ tt_content.skilldisplay_skillset {
     }
 }
 
-page {
-    includeCSS {
-        skilldisplay = EXT:skilldisplay_content/Resources/Public/Css/Styles.css
-    }
-}
diff --git a/README.rst b/README.rst
index 11404b1..2981f2d 100644
--- a/README.rst
+++ b/README.rst
@@ -21,8 +21,7 @@ Right now it provides the following features:
 Installation
 ============
 
-The extension can be installed by downloading recent version from GitHub and adding
-it inside `typo3conf/` folder.
+Install the extension via Extension Manager or composer.
 
 Add static TypoScript once installed and activated via Extension Manager.
 The TypoScript contains the rendering definition for provided content elements.
@@ -47,6 +46,11 @@ Or copy the files from `/Resources/Private/Templates/ContentElements/` to your e
 Configuration
 =============
 
+You may include default CSS for the templates in your TypoScript::
+
+  page.includeCSS.skilldisplay = EXT:skilldisplay_content/Resources/Public/Css/Styles.css
+
+
 Site configuration is extended, where options like API Key can be provided.
 
 Also TypoScript and TSconfig is added to provide wizard entries for new content elements, as well as rendering.
diff --git a/composer.json b/composer.json
index 9a08a40..0f2409d 100644
--- a/composer.json
+++ b/composer.json
@@ -26,40 +26,36 @@
         }
     },
     "require": {
-        "php": "7.2.* || 7.3.* || 7.4.*",
-        "typo3/cms-core": "^10.4",
-        "skilldisplay/phptoolkit": "^1.2.3",
-        "typo3/cms-backend": "^10.4",
-        "typo3/cms-frontend": "^10.4",
-        "typo3fluid/fluid": "^2.6",
-        "guzzlehttp/guzzle": "^6.5"
+        "php": "^7.4 || ^8.1 || ^8.2",
+        "skilldisplay/phptoolkit": "^2.0",
+        "typo3/cms-backend": "^11.5 || ^12.4",
+        "typo3/cms-frontend": "^11.5 || ^12.4"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "^3.5",
         "phpstan/phpstan": "^0.12.18",
         "phpstan/phpstan-phpunit": "*",
         "phpstan/extension-installer": "^1.0",
-        "maglnet/composer-require-checker": "^2.1",
         "saschaegerer/phpstan-typo3": "^0.13.1",
-        "typo3/testing-framework": "^6.4",
+        "typo3/testing-framework": "^7",
         "phpspec/prophecy-phpunit": "^2",
         "jangregor/phpstan-prophecy": "^0.8.0"
     },
-    "minimum-stability": "dev",
-    "prefer-stable": true,
-    "scripts": {
-        "post-autoload-dump": [
-            "TYPO3\\TestingFramework\\Composer\\ExtensionTestEnvironment::prepare"
-        ]
-    },
     "extra": {
         "typo3/cms": {
-            "cms-package-dir": "{$vendor-dir}/typo3/cms",
             "extension-key": "skilldisplay_content",
             "web-dir": ".Build/web"
         },
         "branch-alias": {
-            "dev-main": "2.0.x-dev"
+            "dev-main": "3.x-dev"
+        }
+    },
+    "config": {
+        "vendor-dir": ".Build/vendor",
+        "allow-plugins": {
+            "typo3/cms-composer-installers": true,
+            "typo3/class-alias-loader": true,
+            "phpstan/extension-installer": true
         }
     }
 }
diff --git a/ext_emconf.php b/ext_emconf.php
index 7076a7d..8b17fd2 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -11,10 +11,10 @@ $EM_CONF[$_EXTKEY] = [
     'author' => 'Daniel Siepmann',
     'author_email' => 'coding@daniel-siepmann.de',
     'author_company' => '',
-    'version' => '2.0.3',
+    'version' => '3.0.0',
     'constraints' => [
         'depends' => [
-            'typo3' => '10.4.0-10.4.99',
+            'typo3' => '11.5.0-12.4.99',
         ],
         'conflicts' => [],
         'suggests' => [],
diff --git a/ext_localconf.php b/ext_localconf.php
index c544be0..fbe740f 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -22,6 +22,7 @@
         );
     }
 
+    // todo v11?
     $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/class.tx_cms_layout.php']['tt_content_drawItem'][$extKey] =
         \SkillDisplay\SkilldisplayContent\Backend\Preview::class;
 })('skilldisplay_content');