diff --git a/src/Plugin/Field/FieldFormatter/ExternalDataSourceFormatter.php b/src/Plugin/Field/FieldFormatter/ExternalDataSourceFormatter.php
index 091a52d..967fc1f 100755
--- a/src/Plugin/Field/FieldFormatter/ExternalDataSourceFormatter.php
+++ b/src/Plugin/Field/FieldFormatter/ExternalDataSourceFormatter.php
@@ -3,7 +3,7 @@
 namespace Drupal\external_data_source\Plugin\Field\FieldFormatter;
 
 use Drupal\Component\Utility\Html;
-use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemInterface;
 use Drupal\Core\Field\FieldItemListInterface;
@@ -28,6 +28,13 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  */
 class ExternalDataSourceFormatter extends FormatterBase implements ContainerFactoryPluginInterface {
 
+  /**
+   * The entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
   /**
    * Constructs a StringFormatter instance.
    *
@@ -45,13 +52,13 @@ class ExternalDataSourceFormatter extends FormatterBase implements ContainerFact
    *   The view mode.
    * @param array $third_party_settings
    *   Any third party settings settings.
-   * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
    *   The entity manager.
    */
-  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings, EntityManagerInterface $entity_manager) {
+  public function __construct(string $plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, string $label, string $view_mode, array $third_party_settings, EntityTypeManagerInterface $entity_type_manager) {
     parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode, $third_party_settings);
 
-    $this->entityManager = $entity_manager;
+    $this->entityTypeManager = $entity_type_manager;
   }
 
   /**
@@ -59,7 +66,7 @@ class ExternalDataSourceFormatter extends FormatterBase implements ContainerFact
    */
   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
     return new static(
-      $plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['label'], $configuration['view_mode'], $configuration['third_party_settings'], $container->get('entity.manager')
+      $plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['label'], $configuration['view_mode'], $configuration['third_party_settings'], $container->get('entity_type.manager')
     );
   }