diff --git a/phpBB/styles/prosilver/template/overall_header.html b/phpBB/styles/prosilver/template/overall_header.html
index 2b2036883b..ebe6470fee 100644
--- a/phpBB/styles/prosilver/template/overall_header.html
+++ b/phpBB/styles/prosilver/template/overall_header.html
@@ -31,7 +31,7 @@
 <script>
 	WebFontConfig = {
 		google: {
-			families: ['Open Sans:n6']
+			families: ['Open+Sans:600:cyrillic-ext,latin,greek-ext,greek,vietnamese,latin-ext,cyrillic']
 		}
 	};
 
diff --git a/phpBB/styles/prosilver/template/simple_header.html b/phpBB/styles/prosilver/template/simple_header.html
index 637ac59465..baa6223754 100644
--- a/phpBB/styles/prosilver/template/simple_header.html
+++ b/phpBB/styles/prosilver/template/simple_header.html
@@ -10,7 +10,7 @@
 <script>
 	WebFontConfig = {
 		google: {
-			families: ['Open Sans:n6']
+			families: ['Open+Sans:600:cyrillic-ext,latin,greek-ext,greek,vietnamese,latin-ext,cyrillic']
 		}
 	};