diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
index e2598ac89d..09b4e68bc0 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
@@ -268,6 +268,8 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 	 * Retrieves the post type's schema, conforming to JSON Schema.
 	 *
 	 * @since 4.7.0
+	 * @since 4.8.0 The `supports` property was added.
+	 * @since 5.9.0 The `visibility` property was added.
 	 *
 	 * @return array Item schema data.
 	 */
diff --git a/wp-includes/version.php b/wp-includes/version.php
index bbd1304e92..3dbf1c5f9c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51960';
+$wp_version = '5.9-alpha-51961';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.