diff --git a/api/html/index.php b/api/html/index.php
index f5df465..d9a872c 100644
--- a/api/html/index.php
+++ b/api/html/index.php
@@ -8,6 +8,7 @@ use DI\Container;
 use Slim\Factory\AppFactory;
 use Slim\Routing\RouteCollectorProxy;
 use TorstenHettstedt\TimekeepingApi\Controller\WorkingHoursController;
+use TorstenHettstedt\TimekeepingApi\Controller\WorkingHoursViewController;
 use TorstenHettstedt\TimekeepingApi\Middleware\ErrorHandler;
 use TorstenHettstedt\TimekeepingApi\Middleware\JsonBodyParserMiddleware;
 
@@ -22,25 +23,11 @@ AppFactory::setContainer($container);
 $app = AppFactory::create();
 $app->add(new JsonBodyParserMiddleware());
 
-$app->get(
-    '/',
-    'TorstenHettstedt\TimekeepingApi\Controller\HelloWorldController:read'
-);
-
-$app->get(
-    '/views/working-hours/weekly',
-    'TorstenHettstedt\TimekeepingApi\Controller\WorkingHoursViewController:browseWeekly'
-);
-
-$app->get(
-    '/views/working-hours/monthly',
-    'TorstenHettstedt\TimekeepingApi\Controller\WorkingHoursViewController:browseMonthly'
-);
-
-$app->get(
-    '/views/working-hours/yearly',
-    'TorstenHettstedt\TimekeepingApi\Controller\WorkingHoursViewController:browseYearly'
-);
+$app->group('/views/working-hours', function (RouteCollectorProxy $group) {
+    $group->get('/weekly', WorkingHoursViewController::class . ':browseWeekly');
+    $group->get('/monthly', WorkingHoursViewController::class . ':browseMonthly');
+    $group->get('/yearly', WorkingHoursViewController::class . ':browseYearly');
+});
 
 $app->group('/working-hours', function (RouteCollectorProxy $group) {
     $group->get('', WorkingHoursController::class . ':browse');
diff --git a/api/src/Controller/HelloWorldController.php b/api/src/Controller/HelloWorldController.php
deleted file mode 100644
index cb18a9d..0000000
--- a/api/src/Controller/HelloWorldController.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php /** @noinspection PhpUnused */
-
-
-namespace TorstenHettstedt\TimekeepingApi\Controller;
-
-use Slim\Psr7\Response;
-use Slim\Psr7\Request;
-
-class HelloWorldController
-{
-    /**
-     * @param Request  $request
-     * @param Response $response
-     * @param mixed[]  $args
-     *
-     * @return Response
-     *
-     * @noinspection PhpUnusedParameterInspection
-     */
-    public function read(Request $request, Response $response, array $args): Response
-    {
-        $payload = json_encode('Hallo World');
-
-        $response->getBody()->write($payload);
-
-        return $response
-            ->withHeader('Content-Type', 'application/json')
-            ->withStatus(200);
-    }
-}
\ No newline at end of file