diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index b5cedc6f85..3083cc94f1 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -66,6 +66,9 @@ if ( ! CUSTOM_TAGS ) {
 			'rev' => true,
 			'name' => true,
 			'target' => true,
+			'download' => array(
+				'valueless' => 'y',
+			),
 		),
 		'abbr' => array(),
 		'acronym' => array(),
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 84803e2b4f..c415a564af 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43812';
+$wp_version = '5.0-alpha-43813';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.