diff --git a/src/Commands/NodeRevisionDeleteCommands.php b/src/Commands/NodeRevisionDeleteCommands.php
index 4b2ca60..93399b7 100644
--- a/src/Commands/NodeRevisionDeleteCommands.php
+++ b/src/Commands/NodeRevisionDeleteCommands.php
@@ -24,35 +24,35 @@ class NodeRevisionDeleteCommands extends DrushCommands {
    *
    * @var \Drupal\Core\Config\ConfigFactoryInterface
    */
-  protected ConfigFactoryInterface $configFactory;
+  protected $configFactory;
 
   /**
    * The NodeRevisionDelete service.
    *
    * @var \Drupal\node_revision_delete\NodeRevisionDeleteInterface
    */
-  protected NodeRevisionDeleteInterface $nodeRevisionDelete;
+  protected $nodeRevisionDelete;
 
   /**
    * The DateFormatter service.
    *
    * @var \Drupal\Core\Datetime\DateFormatterInterface
    */
-  protected DateFormatterInterface $dateFormatter;
+  protected $dateFormatter;
 
   /**
    * The State service.
    *
    * @var \Drupal\Core\State\StateInterface
    */
-  protected StateInterface $state;
+  protected $state;
 
   /**
    * The EntityTypeManager service.
    *
    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
    */
-  protected EntityTypeManagerInterface $entityTypeManager;
+  protected $entityTypeManager;
 
   /**
    * NodeRevisionDeleteCommands constructor.
diff --git a/src/Form/AdminSettingsForm.php b/src/Form/AdminSettingsForm.php
index cedfa38..a9eeb09 100644
--- a/src/Form/AdminSettingsForm.php
+++ b/src/Form/AdminSettingsForm.php
@@ -23,14 +23,14 @@ class AdminSettingsForm extends ConfigFormBase {
    *
    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
    */
-  protected EntityTypeManagerInterface $entityTypeManager;
+  protected $entityTypeManager;
 
   /**
    * The node revision delete interface.
    *
    * @var \Drupal\node_revision_delete\NodeRevisionDeleteInterface
    */
-  protected NodeRevisionDeleteInterface $nodeRevisionDelete;
+  protected $nodeRevisionDelete;
 
   /**
    * Constructor.
diff --git a/src/Form/CandidateNodesForm.php b/src/Form/CandidateNodesForm.php
index bd56d3e..5f260bd 100644
--- a/src/Form/CandidateNodesForm.php
+++ b/src/Form/CandidateNodesForm.php
@@ -24,21 +24,21 @@ class CandidateNodesForm extends FormBase {
    *
    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
    */
-  protected EntityTypeManagerInterface $entityTypeManager;
+  protected $entityTypeManager;
 
   /**
    * The node revision delete interface.
    *
    * @var \Drupal\node_revision_delete\NodeRevisionDeleteInterface
    */
-  protected NodeRevisionDeleteInterface $nodeRevisionDelete;
+  protected $nodeRevisionDelete;
 
   /**
    * The date formatter service.
    *
    * @var \Drupal\Core\Datetime\DateFormatterInterface
    */
-  protected DateFormatterInterface $dateFormatter;
+  protected $dateFormatter;
 
   /**
    * Constructor.
diff --git a/src/Form/CandidateNodesRevisionsDeleteForm.php b/src/Form/CandidateNodesRevisionsDeleteForm.php
index 29874ad..cb5163f 100644
--- a/src/Form/CandidateNodesRevisionsDeleteForm.php
+++ b/src/Form/CandidateNodesRevisionsDeleteForm.php
@@ -20,14 +20,14 @@ class CandidateNodesRevisionsDeleteForm extends ConfirmFormBase {
    *
    * @var \Drupal\node\NodeInterface
    */
-  protected NodeInterface $node;
+  protected $node;
 
   /**
    * The node revision delete interface.
    *
    * @var \Drupal\node_revision_delete\NodeRevisionDeleteInterface
    */
-  protected NodeRevisionDeleteInterface $nodeRevisionDelete;
+  protected $nodeRevisionDelete;
 
   /**
    * Constructor.
diff --git a/src/Form/CandidateRevisionsContentTypeForm.php b/src/Form/CandidateRevisionsContentTypeForm.php
index 8b84a41..0b9f941 100644
--- a/src/Form/CandidateRevisionsContentTypeForm.php
+++ b/src/Form/CandidateRevisionsContentTypeForm.php
@@ -26,28 +26,28 @@ class CandidateRevisionsContentTypeForm extends FormBase {
    *
    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
    */
-  protected EntityTypeManagerInterface $entityTypeManager;
+  protected $entityTypeManager;
 
   /**
    * The node revision delete interface.
    *
    * @var \Drupal\node_revision_delete\NodeRevisionDeleteInterface
    */
-  protected NodeRevisionDeleteInterface $nodeRevisionDelete;
+  protected $nodeRevisionDelete;
 
   /**
    * The date formatter service.
    *
    * @var \Drupal\Core\Datetime\DateFormatterInterface
    */
-  protected DateFormatterInterface $dateFormatter;
+  protected $dateFormatter;
 
   /**
    * The renderer service.
    *
    * @var \Drupal\Core\Render\RendererInterface
    */
-  protected RendererInterface $renderer;
+  protected $renderer;
 
   /**
    * Constructor.
diff --git a/src/Form/CandidateRevisionsNodeForm.php b/src/Form/CandidateRevisionsNodeForm.php
index 9a7dcdb..af4817f 100644
--- a/src/Form/CandidateRevisionsNodeForm.php
+++ b/src/Form/CandidateRevisionsNodeForm.php
@@ -26,28 +26,28 @@ class CandidateRevisionsNodeForm extends FormBase {
    *
    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
    */
-  protected EntityTypeManagerInterface $entityTypeManager;
+  protected $entityTypeManager;
 
   /**
    * The node revision delete interface.
    *
    * @var \Drupal\node_revision_delete\NodeRevisionDeleteInterface
    */
-  protected NodeRevisionDeleteInterface $nodeRevisionDelete;
+  protected $nodeRevisionDelete;
 
   /**
    * The date formatter service.
    *
    * @var \Drupal\Core\Datetime\DateFormatterInterface
    */
-  protected DateFormatterInterface $dateFormatter;
+  protected $dateFormatter;
 
   /**
    * The renderer service.
    *
    * @var \Drupal\Core\Render\RendererInterface
    */
-  protected RendererInterface $renderer;
+  protected $renderer;
 
   /**
    * Constructor.
diff --git a/src/Form/ContentTypeConfigurationDeleteForm.php b/src/Form/ContentTypeConfigurationDeleteForm.php
index f233c8b..bce54e8 100644
--- a/src/Form/ContentTypeConfigurationDeleteForm.php
+++ b/src/Form/ContentTypeConfigurationDeleteForm.php
@@ -20,14 +20,14 @@ class ContentTypeConfigurationDeleteForm extends ConfirmFormBase {
    *
    * @var \Drupal\node\NodeTypeInterface
    */
-  protected NodeTypeInterface $contentType;
+  protected $contentType;
 
   /**
    * The node revision delete interface.
    *
    * @var \Drupal\node_revision_delete\NodeRevisionDeleteInterface
    */
-  protected NodeRevisionDeleteInterface $nodeRevisionDelete;
+  protected $nodeRevisionDelete;
 
   /**
    * Constructor.
diff --git a/src/Form/ContentTypeRevisionsDeleteForm.php b/src/Form/ContentTypeRevisionsDeleteForm.php
index 6982f58..e02277f 100644
--- a/src/Form/ContentTypeRevisionsDeleteForm.php
+++ b/src/Form/ContentTypeRevisionsDeleteForm.php
@@ -20,14 +20,14 @@ class ContentTypeRevisionsDeleteForm extends ConfirmFormBase {
    *
    * @var \Drupal\node\NodeTypeInterface
    */
-  protected NodeTypeInterface $contentType;
+  protected $contentType;
 
   /**
    * The node revision delete.
    *
    * @var \Drupal\node_revision_delete\NodeRevisionDeleteInterface
    */
-  protected NodeRevisionDeleteInterface $nodeRevisionDelete;
+  protected $nodeRevisionDelete;
 
   /**
    * Constructor.
diff --git a/src/NodeRevisionDelete.php b/src/NodeRevisionDelete.php
index c31b512..5e5e40e 100644
--- a/src/NodeRevisionDelete.php
+++ b/src/NodeRevisionDelete.php
@@ -24,35 +24,35 @@ class NodeRevisionDelete implements NodeRevisionDeleteInterface {
    *
    * @var \Drupal\Core\Config\ConfigFactoryInterface
    */
-  protected ConfigFactoryInterface $configFactory;
+  protected $configFactory;
 
   /**
    * The configuration file name.
    *
    * @var string
    */
-  protected string $configurationFileName;
+  protected $configurationFileName;
 
   /**
    * The database connection.
    *
    * @var \Drupal\Core\Database\Connection
    */
-  protected Connection $connection;
+  protected $connection;
 
   /**
    * The entity type manager service.
    *
    * @var \Drupal\Core\Entity\EntityTypeManagerInterface
    */
-  protected EntityTypeManagerInterface $entityTypeManager;
+  protected $entityTypeManager;
 
   /**
    * The language manager service.
    *
    * @var \Drupal\Core\Language\LanguageManagerInterface
    */
-  protected LanguageManagerInterface $languageManager;
+  protected $languageManager;
 
   /**
    * Constructor.