diff --git a/.github/workflows/php-cs-fixer.yml b/.github/workflows/php-cs-fixer.yml
new file mode 100644
index 0000000..2d37e13
--- /dev/null
+++ b/.github/workflows/php-cs-fixer.yml
@@ -0,0 +1,7 @@
+name: PHP CS Fixer
+
+on: push
+
+jobs:
+  fixers:
+    uses: humhub/actions/.github/workflows/module-php-cs-fixer.yml@main
diff --git a/Events.php b/Events.php
index 46a9495..20d7bc4 100644
--- a/Events.php
+++ b/Events.php
@@ -49,11 +49,11 @@ public static function onFooterMenuInit($event)
             $page = Page::getPage($pageKey);
             if ($page !== null) {
                 $sortOrder += 10;
-                $event->sender->addItem(array(
+                $event->sender->addItem([
                     'label' => $page->title,
                     'url' => Url::to(['/legal/page/view', 'pageKey' => $pageKey], true),
                     'sortOrder' => $sortOrder,
-                ));
+                ]);
             }
         }
 
@@ -141,7 +141,7 @@ public static function onBeforeControllerAction(ActionEvent $event)
             $event->result = Yii::$app->response->redirect(['/legal/page/update']);
         }
         // Show legal pages in full screen with confirm form, one by one (after account creation)
-        elseif($registrationCheck->showTermsCheck() || $registrationCheck->showPrivacyCheck()) {
+        elseif ($registrationCheck->showTermsCheck() || $registrationCheck->showPrivacyCheck()) {
             $event->isValid = false;
             $event->result = Yii::$app->response->redirect(['/legal/page/confirm']);
         }
diff --git a/Module.php b/Module.php
index 758541a..3c36b76 100644
--- a/Module.php
+++ b/Module.php
@@ -17,7 +17,7 @@ class Module extends \humhub\components\Module
      * @inheritdoc
      */
     public $resourcesPath = 'resources';
-    
+
     /**
      * @inheritdoc
      */
diff --git a/assets/Assets.php b/assets/Assets.php
index ac004d3..83a8d22 100644
--- a/assets/Assets.php
+++ b/assets/Assets.php
@@ -11,19 +11,18 @@
 
 class Assets extends AssetBundle
 {
-
     public $defer = true;
 
     public $publishOptions = [
-        'forceCopy' => false
+        'forceCopy' => false,
     ];
 
     public $sourcePath = '@legal/resources';
     public $css = [
-        'cookieconsent.min.css'
+        'cookieconsent.min.css',
     ];
     public $js = [
-        'cookieconsent.min.js'
+        'cookieconsent.min.js',
     ];
 
 }
diff --git a/assets/ContentAssets.php b/assets/ContentAssets.php
index 341eaff..b6ab721 100644
--- a/assets/ContentAssets.php
+++ b/assets/ContentAssets.php
@@ -23,7 +23,7 @@ class ContentAssets extends AssetBundle
      * @inheritdoc
      */
     public $js = [
-        'js/humhub.legal.js'
+        'js/humhub.legal.js',
     ];
 
     /**
@@ -51,4 +51,4 @@ public static function register($view)
 
         return parent::register($view);
     }
-}
\ No newline at end of file
+}
diff --git a/config.php b/config.php
index 046312f..f5fce73 100644
--- a/config.php
+++ b/config.php
@@ -1,4 +1,6 @@
-<?php /** @noinspection MissedFieldInspection */
+<?php
+
+/** @noinspection MissedFieldInspection */
 
 use humhub\commands\CronController;
 use humhub\components\Controller;
diff --git a/controllers/AdminController.php b/controllers/AdminController.php
index 7f3077e..23f4888 100644
--- a/controllers/AdminController.php
+++ b/controllers/AdminController.php
@@ -25,7 +25,6 @@
  */
 class AdminController extends Controller
 {
-
     public function actionIndex()
     {
         $model = new ConfigureForm();
@@ -71,7 +70,7 @@ public function actionPage($pageKey)
             'pages' => $pages,
             'languages' => $languages,
             'defaultLanguage' => $this->module->getDefaultLanguage(),
-            'pageKey' => $pageKey
+            'pageKey' => $pageKey,
         ]);
     }
 
@@ -117,4 +116,4 @@ protected function getPages($pageKey)
         return $pages;
     }
 
-}
\ No newline at end of file
+}
diff --git a/controllers/ExportController.php b/controllers/ExportController.php
index ae1f00a..3811418 100644
--- a/controllers/ExportController.php
+++ b/controllers/ExportController.php
@@ -1,74 +1,74 @@
-<?php
-/**
- * @link https://www.humhub.org/
- * @copyright Copyright (c) HumHub GmbH & Co. KG
- * @license https://www.humhub.com/licences
- */
-
-namespace humhub\modules\legal\controllers;
-
-use humhub\modules\legal\Module;
-use humhub\modules\legal\services\ExportService;
-use humhub\modules\user\components\BaseAccountController;
-use Yii;
-use yii\web\BadRequestHttpException;
-use yii\web\NotFoundHttpException;
-
-/* @property Module $module */
-class ExportController extends BaseAccountController
-{
-    /**
-     * @inheritdoc
-     */
-    protected function getAccessRules()
-    {
-        return array_merge(parent::getAccessRules(), [
-            ['checkEnabledExportUserData'],
-        ]);
-    }
-
-    public function checkEnabledExportUserData($rule, $access)
-    {
-        return $this->module->isEnabledExportUserData();
-    }
-
-    public function actionIndex()
-    {
-        return $this->render('index', [
-            'service' => ExportService::instance(),
-        ]);
-    }
-
-    public function actionRequest()
-    {
-        if (ExportService::instance()->requestPackage()) {
-            $this->view->success(Yii::t('LegalModule.base', 'The exporting of your data has been started, please wait some time.'));
-        } else {
-            $this->view->error('Cannot start the exporting of your data, please try again.');
-        }
-
-        return $this->redirect(['index']);
-    }
-
-    public function actionDownload()
-    {
-        $package = ExportService::instance()->downloadPackage();
-
-        if ($package === null) {
-            throw new NotFoundHttpException();
-        }
-
-        return $package;
-    }
-
-    public function actionDelete()
-    {
-        if (ExportService::instance()->deletePackage()) {
-            $this->view->success(Yii::t('LegalModule.base', 'The package has been deleted.'));
-        } else {
-            $this->view->error('Cannot delete the package, please try again.');
-        }
-
-        return $this->redirect(['index']);
-    }
-}
+<?php
+/**
+ * @link https://www.humhub.org/
+ * @copyright Copyright (c) HumHub GmbH & Co. KG
+ * @license https://www.humhub.com/licences
+ */
+
+namespace humhub\modules\legal\controllers;
+
+use humhub\modules\legal\Module;
+use humhub\modules\legal\services\ExportService;
+use humhub\modules\user\components\BaseAccountController;
+use Yii;
+use yii\web\BadRequestHttpException;
+use yii\web\NotFoundHttpException;
+
+/* @property Module $module */
+class ExportController extends BaseAccountController
+{
+    /**
+     * @inheritdoc
+     */
+    protected function getAccessRules()
+    {
+        return array_merge(parent::getAccessRules(), [
+            ['checkEnabledExportUserData'],
+        ]);
+    }
+
+    public function checkEnabledExportUserData($rule, $access)
+    {
+        return $this->module->isEnabledExportUserData();
+    }
+
+    public function actionIndex()
+    {
+        return $this->render('index', [
+            'service' => ExportService::instance(),
+        ]);
+    }
+
+    public function actionRequest()
+    {
+        if (ExportService::instance()->requestPackage()) {
+            $this->view->success(Yii::t('LegalModule.base', 'The exporting of your data has been started, please wait some time.'));
+        } else {
+            $this->view->error('Cannot start the exporting of your data, please try again.');
+        }
+
+        return $this->redirect(['index']);
+    }
+
+    public function actionDownload()
+    {
+        $package = ExportService::instance()->downloadPackage();
+
+        if ($package === null) {
+            throw new NotFoundHttpException();
+        }
+
+        return $package;
+    }
+
+    public function actionDelete()
+    {
+        if (ExportService::instance()->deletePackage()) {
+            $this->view->success(Yii::t('LegalModule.base', 'The package has been deleted.'));
+        } else {
+            $this->view->error('Cannot delete the package, please try again.');
+        }
+
+        return $this->redirect(['index']);
+    }
+}
diff --git a/controllers/PageController.php b/controllers/PageController.php
index 342f1c9..f4f0055 100644
--- a/controllers/PageController.php
+++ b/controllers/PageController.php
@@ -59,7 +59,7 @@ public function actionView($pageKey)
 
         return $this->render('view', [
             'page' => $page,
-            'canManagePages' => $this->canManagePages()
+            'canManagePages' => $this->canManagePages(),
         ]);
     }
 
@@ -77,8 +77,7 @@ public function actionConfirm()
         if ($model->showTermsCheck()) {
             $model->restrictToSettingKey = RegistrationChecks::SETTING_KEY_TERMS;
             $page = Page::getPage(Page::PAGE_KEY_TERMS);
-        }
-        elseif ($model->showPrivacyCheck()) {
+        } elseif ($model->showPrivacyCheck()) {
             $model->restrictToSettingKey = RegistrationChecks::SETTING_KEY_PRIVACY;
             $page = Page::getPage(Page::PAGE_KEY_PRIVACY_PROTECTION);
         }
@@ -99,7 +98,7 @@ public function actionConfirm()
         return $this->render('confirm', [
             'page' => $page,
             'model' => $model,
-            'module' => $this->module
+            'module' => $this->module,
         ]);
     }
 
@@ -134,7 +133,7 @@ public function actionUpdate()
         return $this->render('update', [
             'page' => $page,
             'model' => $model,
-            'module' => $this->module
+            'module' => $this->module,
         ]);
     }
 
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index b7a2049..b6baf78 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -4,6 +4,7 @@ Changelog
 1.4.3 (Unreleased)
 --------------------------
 - Fix #85: Fix downloading of large user export data file
+- Enh #90: Use PHP CS Fixer
 
 1.4.2 (September 13, 2024)
 --------------------------
diff --git a/migrations/uninstall.php b/migrations/uninstall.php
index 78b9a52..9dbca4a 100644
--- a/migrations/uninstall.php
+++ b/migrations/uninstall.php
@@ -9,7 +9,6 @@
 
 class uninstall extends Migration
 {
-
     public function up()
     {
         $this->dropTable('legal_page');
diff --git a/models/Page.php b/models/Page.php
index 918f16c..c530026 100644
--- a/models/Page.php
+++ b/models/Page.php
@@ -10,20 +10,20 @@
 /**
  * This is the model class for table "legal_page".
  *
- * @property integer $id
+ * @property int $id
  * @property string $page_key
  * @property string $language
  * @property string $title
  * @property string $content
- * @property integer $last_update
+ * @property int $last_update
  */
 class Page extends ActiveRecord
 {
-    const PAGE_KEY_IMPRINT = 'imprint';
-    const PAGE_KEY_TERMS = 'terms';
-    const PAGE_KEY_PRIVACY_PROTECTION = 'privacy';
-    const PAGE_KEY_COOKIE_NOTICE = 'cookies';
-    const PAGE_KEY_LEGAL_UPDATE = 'update';
+    public const PAGE_KEY_IMPRINT = 'imprint';
+    public const PAGE_KEY_TERMS = 'terms';
+    public const PAGE_KEY_PRIVACY_PROTECTION = 'privacy';
+    public const PAGE_KEY_COOKIE_NOTICE = 'cookies';
+    public const PAGE_KEY_LEGAL_UPDATE = 'update';
 
     /**
      * @inheritdoc
@@ -68,7 +68,7 @@ public function afterSave($insert, $changedAttributes)
     public function rules()
     {
         return [
-            [['title', 'content'], 'safe']
+            [['title', 'content'], 'safe'],
         ];
     }
 
diff --git a/models/RegistrationChecks.php b/models/RegistrationChecks.php
index f1be718..678cdaf 100644
--- a/models/RegistrationChecks.php
+++ b/models/RegistrationChecks.php
@@ -23,10 +23,9 @@
  */
 class RegistrationChecks extends Model
 {
-
-    const SETTING_KEY_TERMS = 'acceptedTerms';
-    const SETTING_KEY_PRIVACY = 'acceptedPrivacy';
-    const SETTING_KEY_AGE = 'acceptedAge';
+    public const SETTING_KEY_TERMS = 'acceptedTerms';
+    public const SETTING_KEY_PRIVACY = 'acceptedPrivacy';
+    public const SETTING_KEY_AGE = 'acceptedAge';
 
     public $ageCheck;
     public $termsCheck;
@@ -66,7 +65,7 @@ public function attributeLabels()
         return [
             'ageCheck' => Yii::t('LegalModule.base', 'I am older than {age} years', ['age' => \Yii::$app->getModule('legal')->getMinimumAge()]),
             'termsCheck' => Yii::t('LegalModule.base', 'I have read and agree to the Terms and Conditions'),
-            'dataPrivacyCheck' => Yii::t('LegalModule.base', 'I have read and agree to the Privacy Policy')
+            'dataPrivacyCheck' => Yii::t('LegalModule.base', 'I have read and agree to the Privacy Policy'),
         ];
     }
 
diff --git a/tests/codeception/_support/AcceptanceTester.php b/tests/codeception/_support/AcceptanceTester.php
index 6cf5a59..9cc839e 100644
--- a/tests/codeception/_support/AcceptanceTester.php
+++ b/tests/codeception/_support/AcceptanceTester.php
@@ -150,4 +150,4 @@ public function testPage(string $page, string $title, string $content, string $a
         $this->amUser1(true);
         $this->dontSee($title, '.panel-heading');
     }
-}
\ No newline at end of file
+}
diff --git a/tests/codeception/acceptance/LegalCest.php b/tests/codeception/acceptance/LegalCest.php
index 4044377..49c55e3 100644
--- a/tests/codeception/acceptance/LegalCest.php
+++ b/tests/codeception/acceptance/LegalCest.php
@@ -37,19 +37,23 @@ public function testImprint(AcceptanceTester $I)
     public function testTermsAndConditions(AcceptanceTester $I)
     {
         $I->wantTo('test terms and conditions');
-        $I->testPage(Page::PAGE_KEY_TERMS,
+        $I->testPage(
+            Page::PAGE_KEY_TERMS,
             'Test Terms and Conditions title',
             'Test Terms and Conditions content',
-            'termscheck');
+            'termscheck',
+        );
     }
 
     public function testPrivacyPolicy(AcceptanceTester $I)
     {
         $I->wantTo('test privacy policy');
-        $I->testPage(Page::PAGE_KEY_PRIVACY_PROTECTION,
+        $I->testPage(
+            Page::PAGE_KEY_PRIVACY_PROTECTION,
             'Test Privacy Policy title',
             'Test Privacy Policy content',
-            'dataprivacycheck');
+            'dataprivacycheck',
+        );
     }
 
     public function testCookie(AcceptanceTester $I)
@@ -78,12 +82,12 @@ public function testUpdate(AcceptanceTester $I)
         $pages = [
             Page::PAGE_KEY_TERMS => [
                 'title' => 'Test Terms and Conditions title',
-                'content' => 'Test Terms and Conditions content'
+                'content' => 'Test Terms and Conditions content',
             ],
             Page::PAGE_KEY_LEGAL_UPDATE => [
                 'title' => 'Test Legal Update title',
-                'content' => 'Test Legal Update content'
-            ]
+                'content' => 'Test Legal Update content',
+            ],
         ];
 
         $I->amAdmin();
@@ -132,4 +136,4 @@ public function testAgeVerification(AcceptanceTester $I)
         $I->amUser1(true);
         $I->dontSee($title, '.panel-heading');
     }
-}
\ No newline at end of file
+}
diff --git a/tests/config/test.php b/tests/config/test.php
index d55661a..5670ad1 100644
--- a/tests/config/test.php
+++ b/tests/config/test.php
@@ -7,5 +7,5 @@
 
 return [
     'modules' => ['legal'],
-    'fixtures' => ['default']
+    'fixtures' => ['default'],
 ];
diff --git a/widgets/AdminMenu.php b/widgets/AdminMenu.php
index afe8f0c..048967f 100644
--- a/widgets/AdminMenu.php
+++ b/widgets/AdminMenu.php
@@ -13,7 +13,6 @@
 
 class AdminMenu extends \humhub\widgets\BaseMenu
 {
-
     public $template = "@humhub/widgets/views/tabMenu";
 
     public function init()
diff --git a/widgets/Content.php b/widgets/Content.php
index 316bbd1..58d7cd3 100644
--- a/widgets/Content.php
+++ b/widgets/Content.php
@@ -40,7 +40,7 @@ public function run()
         return $this->render('content', [
             'content' => $this->content,
             'richtext' => $this->richtext,
-            'options' => $this->getOptions()
+            'options' => $this->getOptions(),
         ]);
     }
-}
\ No newline at end of file
+}
diff --git a/widgets/CookieNote.php b/widgets/CookieNote.php
index 7dcb655..c41bae5 100644
--- a/widgets/CookieNote.php
+++ b/widgets/CookieNote.php
@@ -6,11 +6,11 @@
  */
 
 namespace humhub\modules\legal\widgets;
+
 use humhub\components\Widget;
 use humhub\modules\legal\models\Page;
 use yii\web\HttpException;
 
-
 /**
  * Class CookieNote
  * @package humhub\modules\legal\widgets
@@ -26,4 +26,4 @@ public function run()
 
         return $this->render('cookies', ['page' => $page]);
     }
-}
\ No newline at end of file
+}