diff --git a/view/templates/head.tpl b/view/templates/head.tpl
index e76b97b8b..f1983d7dc 100644
--- a/view/templates/head.tpl
+++ b/view/templates/head.tpl
@@ -9,7 +9,7 @@
 <link rel="stylesheet" href="view/asset/perfect-scrollbar/css/perfect-scrollbar.min.css" type="text/css" media="screen" />
 
 {{foreach $stylesheets as $stylesheetUrl}}
-<link rel="stylesheet" href="{{$stylesheetUrl}}" type="text/css" media="screen" />
+<link rel="stylesheet" href="{{$stylesheetUrl|escape:"html":"UTF-8"}}" type="text/css" media="screen" />
 {{/foreach}}
 
 <link rel="shortcut icon" href="{{$shortcut_icon}}" />
diff --git a/view/theme/frio/templates/head.tpl b/view/theme/frio/templates/head.tpl
index d8f8b1d82..c8d30c0b5 100644
--- a/view/theme/frio/templates/head.tpl
+++ b/view/theme/frio/templates/head.tpl
@@ -26,7 +26,7 @@
 <link rel="stylesheet" href="view/theme/frio/font/open_sans/open-sans.css" type="text/css" media="screen"/>
 
 {{foreach $stylesheets as $stylesheetUrl}}
-<link rel="stylesheet" href="{{$stylesheetUrl}}" type="text/css" media="screen" />
+<link rel="stylesheet" href="{{$stylesheetUrl|escape:"html":"UTF-8"}}" type="text/css" media="screen" />
 {{/foreach}}
 
 {{* own css files *}}