diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
index 58ad748132..c0322f3a84 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
@@ -210,7 +210,7 @@ class WP_REST_Taxonomies_Controller extends WP_REST_Controller {
 		}
 
 		if ( in_array( 'types', $fields, true ) ) {
-			$data['types'] = $taxonomy->object_type;
+			$data['types'] = array_values( $taxonomy->object_type );
 		}
 
 		if ( in_array( 'show_cloud', $fields, true ) ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 64a34623ca..39fb727483 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45812';
+$wp_version = '5.3-alpha-45813';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.