diff --git a/Admin/EmailAdmin.php b/Admin/EmailAdmin.php
index 062ca7d..65e33d7 100644
--- a/Admin/EmailAdmin.php
+++ b/Admin/EmailAdmin.php
@@ -88,7 +88,7 @@ protected function configureFormFields(FormMapper $formMapper)
                     'headers',
                     'sonata_type_native_collection',
                     array(
-                        'type'         => HeaderType::class,
+                        'entry_type'   => HeaderType::class,
                         'allow_add'    => true,
                         'allow_delete' => true,
                     )