diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
index 23017d7c29..4862fae564 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
@@ -2130,12 +2130,15 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 			'type'               => 'string',
 			'default'            => 'date',
 			'enum'               => array(
+				'author',
 				'date',
-				'relevance',
 				'id',
 				'include',
-				'title',
+				'modified',
+				'parent',
+				'relevance',
 				'slug',
+				'title',
 			),
 		);
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 08f32cb1f4..4fcd916b24 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40604';
+$wp_version = '4.8-alpha-40605';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.