+       /**
+        * {@inheritdoc}
+        */
+       public function configureOptions(OptionsResolver $resolver): void {
+               //Call parent configure options
+               parent::configureOptions($resolver);
+
+               //Set defaults
+               $resolver->setDefaults(['captcha' => false]);
+
+               //Add extra captcha option
+               $resolver->setAllowedTypes('captcha', 'boolean');
+       }
+