Index: wp-includes/theme-compat/header.php
===================================================================
--- wp-includes/theme-compat/header.php	(revision 40632)
+++ wp-includes/theme-compat/header.php	(working copy)
@@ -16,9 +16,9 @@
 );
 ?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
+<html xmlns="https://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
 <head>
-<link rel="profile" href="http://gmpg.org/xfn/11" />
+<link rel="profile" href="https://gmpg.org/xfn/11" />
 <meta http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset=<?php bloginfo('charset'); ?>" />
 
 <title><?php echo wp_get_document_title(); ?></title>
