diff --git a/src/Form/EntityEmbedDialog.php b/src/Form/EntityEmbedDialog.php
index ae0194b..f9c5453 100644
--- a/src/Form/EntityEmbedDialog.php
+++ b/src/Form/EntityEmbedDialog.php
@@ -463,7 +463,7 @@ class EntityEmbedDialog extends FormBase {
     if ($editor->getFilterFormat()->filters('filter_caption')->status) {
       $form['attributes']['data-caption'] = array(
         '#title' => $this->t('Caption'),
-        '#type' => 'textfield',
+        '#type' => 'textarea',
         '#default_value' => isset($entity_element['data-caption']) ? Html::decodeEntities($entity_element['data-caption']) : '',
         '#element_validate' => array('::escapeValue'),
       );