diff --git a/src/Controller/EventController.php b/src/Controller/EventController.php
index 80fd2af7..5a0b871d 100644
--- a/src/Controller/EventController.php
+++ b/src/Controller/EventController.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * This file is part of the AdminLTE bundle.
+ * This file is part of the Kimai time-tracking app.
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
diff --git a/src/Event/ThemeEvent.php b/src/Event/ThemeEvent.php
index 52f57e0e..6ca3faa6 100644
--- a/src/Event/ThemeEvent.php
+++ b/src/Event/ThemeEvent.php
@@ -73,6 +73,7 @@ class ThemeEvent extends Event
     public function addContent(string $content)
     {
         $this->content .= $content;
+
         return $this;
     }
 }
diff --git a/src/EventSubscriber/ThemeOptionsSubscriber.php b/src/EventSubscriber/ThemeOptionsSubscriber.php
index 4e22bfd2..24375726 100644
--- a/src/EventSubscriber/ThemeOptionsSubscriber.php
+++ b/src/EventSubscriber/ThemeOptionsSubscriber.php
@@ -66,7 +66,6 @@ class ThemeOptionsSubscriber implements EventSubscriberInterface
 
         $skin = '';
         foreach ($user->getPreferences() as $ref) {
-
             $name = $ref->getName();
             switch ($name) {
                 case UserPreference::SKIN:
diff --git a/src/Kernel.php b/src/Kernel.php
index 6dde12cc..290c300d 100644
--- a/src/Kernel.php
+++ b/src/Kernel.php
@@ -88,7 +88,7 @@ class Kernel extends BaseKernel
                 continue;
             }
 
-            yield new $pluginClass;
+            yield new $pluginClass();
         }
     }
 
@@ -135,7 +135,7 @@ class Kernel extends BaseKernel
 
         // load plugin routes
         $pluginsDir = $this->getProjectDir() . '/var/plugins';
-        $routes->import($pluginsDir . '/*Bundle/Resources/config/routes'. self::CONFIG_EXTS, '/', 'glob');
+        $routes->import($pluginsDir . '/*Bundle/Resources/config/routes' . self::CONFIG_EXTS, '/', 'glob');
     }
 
     protected function configureFosUserRoutes(RouteCollectionBuilder $routes)
diff --git a/src/Migrations/Version20190219200020.php b/src/Migrations/Version20190219200020.php
index 8724561f..4279a54e 100644
--- a/src/Migrations/Version20190219200020.php
+++ b/src/Migrations/Version20190219200020.php
@@ -29,9 +29,9 @@ final class Version20190219200020 extends AbstractMigration
 
         $userPrefs = $this->getTableName('user_preferences');
 
-        $this->addSql('DELETE FROM ' . $userPrefs. ' WHERE name = "theme.fixed_layout"');
-        $this->addSql('DELETE FROM ' . $userPrefs. ' WHERE name = "theme.boxed_layout"');
-        $this->addSql('DELETE FROM ' . $userPrefs. ' WHERE name = "theme.mini_sidebar"');
+        $this->addSql('DELETE FROM ' . $userPrefs . ' WHERE name = "theme.fixed_layout"');
+        $this->addSql('DELETE FROM ' . $userPrefs . ' WHERE name = "theme.boxed_layout"');
+        $this->addSql('DELETE FROM ' . $userPrefs . ' WHERE name = "theme.mini_sidebar"');
     }
 
     public function down(Schema $schema): void
diff --git a/templates/macros/datatables.html.twig b/templates/macros/datatables.html.twig
index 17f364ba..82511ad1 100644
--- a/templates/macros/datatables.html.twig
+++ b/templates/macros/datatables.html.twig
@@ -4,8 +4,8 @@
     <div class="modal-dialog" role="document">
         <div class="modal-content">
             <div class="modal-header">
-                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
-                <h4 class="modal-title" id="myModalLabel">{{ 'modal.columns.title'|trans }}</h4>
+                <button type="button" class="close" data-dismiss="modal" aria-label="{{ 'action.close'|trans }}"><span aria-hidden="true">&times;</span></button>
+                <h4 class="modal-title" id="data_table_modal_label">{{ 'modal.columns.title'|trans }}</h4>
             </div>
             <div class="modal-body">
                 <form name="{{ name }}_visibility">
diff --git a/templates/sidebar/settings.html.twig b/templates/sidebar/settings.html.twig
index 663eb277..eb003e2b 100644
--- a/templates/sidebar/settings.html.twig
+++ b/templates/sidebar/settings.html.twig
@@ -46,7 +46,7 @@
     </li>
     {% endif %}
     <li>
-        <a href="{{ path('help') }}">
+        <a href="{{ constant('App\\Constants::HOMEPAGE') }}/documentation/" target="_blank">
             <div class="pull-left image">
                 <i class="{{ 'help'|icon }} text-gray"></i>
             </div>
diff --git a/tests/Controller/SidebarControllerTest.php b/tests/Controller/SidebarControllerTest.php
index f22055f5..19871217 100644
--- a/tests/Controller/SidebarControllerTest.php
+++ b/tests/Controller/SidebarControllerTest.php
@@ -9,6 +9,7 @@
 
 namespace App\Tests\Controller;
 
+use App\Constants;
 use App\Entity\User;
 
 /**
@@ -33,7 +34,7 @@ class SidebarControllerTest extends ControllerBaseTest
         $this->assertContains('<a href="/en/profile/' . $user->getUsername() . '">', $content);
         $this->assertContains('<a href="/en/profile/' . $user->getUsername() . '/edit">', $content);
         $this->assertContains('<a href="/en/profile/' . $user->getUsername() . '/prefs">', $content);
-        $this->assertContains('<a href="/en/help/">', $content);
+        $this->assertContains('<a href="' . Constants::HOMEPAGE . '/documentation/" target="_blank">', $content);
         $this->assertContains('<a href="/en/logout">', $content);
     }
 }