diff --git a/phpBB/styles/prosilver/template/overall_header.html b/phpBB/styles/prosilver/template/overall_header.html
index 03891eeca8..4e2013e276 100644
--- a/phpBB/styles/prosilver/template/overall_header.html
+++ b/phpBB/styles/prosilver/template/overall_header.html
@@ -27,7 +27,22 @@
 	Modified by:
 -->
 
-<!-- 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="all and (max-width: 700px), all and (max-device-width: 700px)" />