diff --git a/phpBB/styles/prosilver/template/overall_header.html b/phpBB/styles/prosilver/template/overall_header.html
index 4e2013e276..2b2036883b 100644
--- a/phpBB/styles/prosilver/template/overall_header.html
+++ b/phpBB/styles/prosilver/template/overall_header.html
@@ -7,17 +7,17 @@
 <title><!-- IF UNREAD_NOTIFICATIONS_COUNT -->({UNREAD_NOTIFICATIONS_COUNT}) <!-- ENDIF --><!-- IF not S_VIEWTOPIC and not S_VIEWFORUM -->{SITENAME} - <!-- ENDIF --><!-- IF S_IN_MCP -->{L_MCP} - <!-- ELSEIF S_IN_UCP -->{L_UCP} - <!-- ENDIF -->{PAGE_TITLE}<!-- IF S_VIEWTOPIC or S_VIEWFORUM --> - {SITENAME}<!-- ENDIF --></title>
 
 <!-- IF S_ENABLE_FEEDS -->
-	<!-- IF S_ENABLE_FEEDS_OVERALL --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {SITENAME}" href="{U_FEED}" /><!-- ENDIF -->
-	<!-- IF S_ENABLE_FEEDS_NEWS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_NEWS}" href="{U_FEED}?mode=news" /><!-- ENDIF -->
-	<!-- IF S_ENABLE_FEEDS_FORUMS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_ALL_FORUMS}" href="{U_FEED}?mode=forums" /><!-- ENDIF -->
-	<!-- IF S_ENABLE_FEEDS_TOPICS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_TOPICS_NEW}" href="{U_FEED}?mode=topics" /><!-- ENDIF -->
-	<!-- IF S_ENABLE_FEEDS_TOPICS_ACTIVE --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_TOPICS_ACTIVE}" href="{U_FEED}?mode=topics_active" /><!-- ENDIF -->
-	<!-- IF S_ENABLE_FEEDS_FORUM and S_FORUM_ID --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FORUM} - {FORUM_NAME}" href="{U_FEED}?f={S_FORUM_ID}" /><!-- ENDIF -->
-	<!-- IF S_ENABLE_FEEDS_TOPIC and S_TOPIC_ID --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_TOPIC} - {TOPIC_TITLE}" href="{U_FEED}?f={S_FORUM_ID}&amp;t={S_TOPIC_ID}" /><!-- ENDIF -->
+	<!-- IF S_ENABLE_FEEDS_OVERALL --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {SITENAME}" href="{U_FEED}"><!-- ENDIF -->
+	<!-- IF S_ENABLE_FEEDS_NEWS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_NEWS}" href="{U_FEED}?mode=news"><!-- ENDIF -->
+	<!-- IF S_ENABLE_FEEDS_FORUMS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_ALL_FORUMS}" href="{U_FEED}?mode=forums"><!-- ENDIF -->
+	<!-- IF S_ENABLE_FEEDS_TOPICS --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_TOPICS_NEW}" href="{U_FEED}?mode=topics"><!-- ENDIF -->
+	<!-- IF S_ENABLE_FEEDS_TOPICS_ACTIVE --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FEED_TOPICS_ACTIVE}" href="{U_FEED}?mode=topics_active"><!-- ENDIF -->
+	<!-- IF S_ENABLE_FEEDS_FORUM and S_FORUM_ID --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_FORUM} - {FORUM_NAME}" href="{U_FEED}?f={S_FORUM_ID}"><!-- ENDIF -->
+	<!-- IF S_ENABLE_FEEDS_TOPIC and S_TOPIC_ID --><link rel="alternate" type="application/atom+xml" title="{L_FEED} - {L_TOPIC} - {TOPIC_TITLE}" href="{U_FEED}?f={S_FORUM_ID}&amp;t={S_TOPIC_ID}"><!-- ENDIF -->
 <!-- ENDIF -->
 
 <!-- IF U_CANONICAL -->
-	<link rel="canonical" href="{U_CANONICAL}" />
+	<link rel="canonical" href="{U_CANONICAL}">
 <!-- ENDIF -->
 
 <!--
@@ -45,7 +45,7 @@
 <!-- ENDIF -->
 <link href="{T_STYLESHEET_LINK}" rel="stylesheet">
 <link href="{T_STYLESHEET_LANG_LINK}" rel="stylesheet">
-<link href="{T_THEME_PATH}/responsive.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet" media="all and (max-width: 700px), all and (max-device-width: 700px)" />
+<link href="{T_THEME_PATH}/responsive.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet" media="all and (max-width: 700px), all and (max-device-width: 700px)">
 
 <!-- IF S_CONTENT_DIRECTION eq 'rtl' -->
 	<link href="{T_THEME_PATH}/bidi.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet">
diff --git a/phpBB/styles/prosilver/template/simple_header.html b/phpBB/styles/prosilver/template/simple_header.html
index ab4f855a97..637ac59465 100644
--- a/phpBB/styles/prosilver/template/simple_header.html
+++ b/phpBB/styles/prosilver/template/simple_header.html
@@ -6,18 +6,32 @@
 {META}
 <title>{SITENAME} &bull; <!-- IF S_IN_MCP -->{L_MCP} &bull; <!-- ELSEIF S_IN_UCP -->{L_UCP} &bull; <!-- ENDIF -->{PAGE_TITLE}</title>
 
-<link href="{T_THEME_PATH}/print.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet" type="text/css" media="print" title="printonly" />
-<!-- IF S_ALLOW_CDN --><link href="//fonts.googleapis.com/css?family=Open+Sans:600&amp;subset=latin,cyrillic-ext,latin-ext,cyrillic,greek-ext,greek,vietnamese" rel="stylesheet" type="text/css" media="screen, projection" /><!-- ENDIF -->
-<link href="{T_STYLESHEET_LINK}" rel="stylesheet" type="text/css" media="screen, projection" />
-<link href="{T_STYLESHEET_LANG_LINK}" rel="stylesheet" type="text/css" media="screen, projection" />
-<link href="{T_THEME_PATH}/responsive.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet" type="text/css" media="only screen and (max-width: 700px), only screen and (max-device-width: 700px)" />
+<!-- IF S_ALLOW_CDN -->
+<script>
+	WebFontConfig = {
+		google: {
+			families: ['Open Sans:n6']
+		}
+	};
+
+	(function(d) {
+		var wf = d.createElement('script'), s = d.scripts[0];
+		wf.src = 'https://ajax.googleapis.com/ajax/libs/webfont/1.5.18/webfont.js';
+		wf.async = true;
+		s.parentNode.insertBefore(wf, s);
+	})(document);
+</script>
+<!-- ENDIF -->
+<link href="{T_STYLESHEET_LINK}" rel="stylesheet">
+<link href="{T_STYLESHEET_LANG_LINK}" rel="stylesheet">
+<link href="{T_THEME_PATH}/responsive.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet" media="only screen and (max-width: 700px), only screen and (max-device-width: 700px)">
 
 <!-- IF S_CONTENT_DIRECTION eq 'rtl' -->
-	<link href="{T_THEME_PATH}/bidi.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet" type="text/css" media="screen, projection" />
+	<link href="{T_THEME_PATH}/bidi.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet">
 <!-- ENDIF -->
 
 <!--[if lte IE 8]>
-	<link href="{T_THEME_PATH}/tweaks.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet" type="text/css" media="screen, projection" />
+	<link href="{T_THEME_PATH}/tweaks.css?assets_version={T_ASSETS_VERSION}" rel="stylesheet">
 <![endif]-->
 
 <!-- DEFINE $POPUP = 1 -->
diff --git a/phpBB/styles/prosilver/template/ucp_pm_viewmessage_print.html b/phpBB/styles/prosilver/template/ucp_pm_viewmessage_print.html
index 7fe0d67077..55d81b4e69 100644
--- a/phpBB/styles/prosilver/template/ucp_pm_viewmessage_print.html
+++ b/phpBB/styles/prosilver/template/ucp_pm_viewmessage_print.html
@@ -6,7 +6,7 @@
 {META}
 <title>{SITENAME} &bull; {PAGE_TITLE}</title>
 
-<link href="{T_THEME_PATH}/print.css" rel="stylesheet" type="text/css" />
+<link href="{T_THEME_PATH}/print.css" rel="stylesheet">
 <!-- EVENT ucp_pm_viewmessage_print_head_append -->
 </head>
 <body id="phpbb">
diff --git a/phpBB/styles/prosilver/template/viewtopic_print.html b/phpBB/styles/prosilver/template/viewtopic_print.html
index 66199295bb..f65f1ab542 100644
--- a/phpBB/styles/prosilver/template/viewtopic_print.html
+++ b/phpBB/styles/prosilver/template/viewtopic_print.html
@@ -6,7 +6,7 @@
 {META}
 <title>{SITENAME} &bull; {PAGE_TITLE}</title>
 
-<link href="{T_THEME_PATH}/print.css" rel="stylesheet" type="text/css" />
+<link href="{T_THEME_PATH}/print.css" rel="stylesheet">
 <!-- EVENT viewtopic_print_head_append -->
 </head>
 <body id="phpbb">