Mathieu De Meue
--- a/src/Form/PostmarkSettingsForm.php
+++ b/src/Form/PostmarkSettingsForm.php
   * @param \Drupal\postmark\PostmarkHandler $postmark_handler
   *   The core mail manager service.
   */
-  public function __construct(ConfigFactoryInterface $config_factory, PostmarkHandler $postmark_handler) {
-    parent::__construct($config_factory);
+  public function __construct(ConfigFactoryInterface $config_factory, PostmarkHandler $postmark_handler, TypedConfigManagerInterface $typed_config_manager) {
+    parent::__construct($config_factory, $typed_config_manager);
--- a/src/Form/PostmarkSettingsForm.php
+++ b/src/Form/PostmarkSettingsForm.php
  public static function create(ContainerInterface $container) {
    return new static(
      $container->get('config.factory'),
-      $container->get('postmark.mail_handler')
+      $container->get('postmark.mail_handler'),
+      $container->get('config.typed')