diff --git a/phpBB/styles/prosilver/template/simple_header.html b/phpBB/styles/prosilver/template/simple_header.html
index de79ef2028..637ac59465 100644
--- a/phpBB/styles/prosilver/template/simple_header.html
+++ b/phpBB/styles/prosilver/template/simple_header.html
@@ -6,7 +6,22 @@
 {META}
 <title>{SITENAME} &bull; <!-- IF S_IN_MCP -->{L_MCP} &bull; <!-- ELSEIF S_IN_UCP -->{L_UCP} &bull; <!-- ENDIF -->{PAGE_TITLE}</title>
 
-<!-- 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"><!-- ENDIF -->
+<!-- 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)">