diff --git a/phpBB/styles/prosilver/theme/buttons.css b/phpBB/styles/prosilver/theme/buttons.css
index 9336dd09f8..4a8d43079a 100644
--- a/phpBB/styles/prosilver/theme/buttons.css
+++ b/phpBB/styles/prosilver/theme/buttons.css
@@ -27,7 +27,8 @@
 	border-radius: 4px;
 	background: transparent none 0 0 repeat-x;
 	padding: 2px 22px 2px 8px;
-	font-family: Verdana, Arial, Helvetica;
+	font-family: "Open Sans", Verdana, Arial, Helvetica;
+	font-weight: 600;
 	position: relative;
 	text-decoration: none !important;
 	outline-style: none !important;
diff --git a/phpBB/styles/prosilver/theme/colours.css b/phpBB/styles/prosilver/theme/colours.css
index 7d0462be1b..7449014801 100644
--- a/phpBB/styles/prosilver/theme/colours.css
+++ b/phpBB/styles/prosilver/theme/colours.css
@@ -1111,4 +1111,3 @@ input.disabled {
 .notification_list .pointer_inner {
 	border-bottom-color: #F1F8FF;
 }
-
diff --git a/phpBB/styles/prosilver/theme/stylesheet.css b/phpBB/styles/prosilver/theme/stylesheet.css
index 48a00c6803..adc5bdff25 100644
--- a/phpBB/styles/prosilver/theme/stylesheet.css
+++ b/phpBB/styles/prosilver/theme/stylesheet.css
@@ -7,6 +7,7 @@
     --------------------------------------------------------------
 */
 
+@import url("http://fonts.googleapis.com/css?family=Open+Sans:600&subset=latin,cyrillic-ext,latin-ext,cyrillic,greek-ext,greek,vietnamese");
 @import url("common.css");
 @import url("links.css");
 @import url("content.css");