diff --git a/src/Controller/ParagraphsPreviewController.php b/src/Controller/ParagraphsPreviewController.php
index 9b874ec..921531e 100644
--- a/src/Controller/ParagraphsPreviewController.php
+++ b/src/Controller/ParagraphsPreviewController.php
@@ -1,10 +1,5 @@
 <?php
 
-/**
- * @file
- * Contains \Drupal\paragraphs_previewer\Controller\ParagraphsPreviewController.
- */
-
 namespace Drupal\paragraphs_previewer\Controller;
 
 use Drupal\Core\Controller\ControllerBase;
@@ -79,7 +74,7 @@ class ParagraphsPreviewController extends ControllerBase {
     // Set empty message if nothing is rendered.
     if (empty($output_render)) {
       $output_render['empty'] = array(
-        '#markup' => t('No preview available.'),
+        '#markup' => $this->t('No preview available.'),
       );
     }
 
diff --git a/src/Plugin/Field/FieldWidget/InlineParagraphsPreviewerWidget.php b/src/Plugin/Field/FieldWidget/InlineParagraphsPreviewerWidget.php
index b671e5c..69f78d2 100644
--- a/src/Plugin/Field/FieldWidget/InlineParagraphsPreviewerWidget.php
+++ b/src/Plugin/Field/FieldWidget/InlineParagraphsPreviewerWidget.php
@@ -1,10 +1,5 @@
 <?php
 
-/**
- * @file
- * Paragraphs Previewer widget implementation for paragraphs.
- */
-
 namespace Drupal\paragraphs_previewer\Plugin\Field\FieldWidget;
 
 use Drupal\paragraphs\Plugin\Field\FieldWidget\InlineParagraphsWidget;