diff --git a/phpBB/styles/prosilver/template/overall_header.html b/phpBB/styles/prosilver/template/overall_header.html
index 0b0c7a4172..6ca5c86fa4 100644
--- a/phpBB/styles/prosilver/template/overall_header.html
+++ b/phpBB/styles/prosilver/template/overall_header.html
@@ -25,6 +25,7 @@
 -->
 
 <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" />
 
diff --git a/phpBB/styles/prosilver/template/simple_header.html b/phpBB/styles/prosilver/template/simple_header.html
index 08b212363e..c5dfbc2f8f 100644
--- a/phpBB/styles/prosilver/template/simple_header.html
+++ b/phpBB/styles/prosilver/template/simple_header.html
@@ -8,6 +8,7 @@
 <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" />
 
diff --git a/phpBB/styles/prosilver/theme/buttons.css b/phpBB/styles/prosilver/theme/buttons.css
index 9336dd09f8..3860869501 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", "Droid 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 9e3d29bec2..08123fd9e8 100644
--- a/phpBB/styles/prosilver/theme/colours.css
+++ b/phpBB/styles/prosilver/theme/colours.css
@@ -1124,4 +1124,3 @@ input.disabled {
 .notification_list .pointer_inner {
 	border-bottom-color: #F1F8FF;
 }
-