diff --git a/wp-content/themes/twentyfifteen/header.php b/wp-content/themes/twentyfifteen/header.php
index 9cacfc20b8..62bc8f2e8e 100644
--- a/wp-content/themes/twentyfifteen/header.php
+++ b/wp-content/themes/twentyfifteen/header.php
@@ -16,7 +16,7 @@
 	<link rel="profile" href="http://gmpg.org/xfn/11">
 	<link rel="pingback" href="<?php bloginfo( 'pingback_url' ); ?>">
 	<!--[if lt IE 9]>
-	<script src="<?php echo get_template_directory_uri(); ?>/js/html5.js"></script>
+	<script src="<?php echo esc_url( get_template_directory_uri() ); ?>/js/html5.js"></script>
 	<![endif]-->
 	<script>(function(){document.documentElement.className='js'})();</script>
 	<?php wp_head(); ?>
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ff69cc9f5a..5678f7fe88 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-alpha-30217';
+$wp_version = '4.1-alpha-30218';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.