diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 5b3b1241a9..292abf9355 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -4954,6 +4954,7 @@ function send_frame_options_header() {
  *
  * @since 3.3.0
  * @since 4.3.0 Added 'webcal' to the protocols array.
+ * @since 4.7.0 Added 'urn' to the protocols array.
  *
  * @see wp_kses()
  * @see esc_url()
@@ -4962,13 +4963,13 @@ function send_frame_options_header() {
  *
  * @return array Array of allowed protocols. Defaults to an array containing 'http', 'https',
  *               'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet',
- *               'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp', and 'webcal'.
+ *               'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp', 'webcal', and 'urn'.
  */
 function wp_allowed_protocols() {
 	static $protocols = array();
 
 	if ( empty( $protocols ) ) {
-		$protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp', 'webcal' );
+		$protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp', 'webcal', 'urn' );
 
 		/**
 		 * Filters the list of protocols allowed in HTML attributes.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index f5f164b441..e061323526 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38685';
+$wp_version = '4.7-alpha-38686';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.