diff --git a/public/admin/index.php b/public/admin/index.php
index 5016836..79ad66c 100644
--- a/public/admin/index.php
+++ b/public/admin/index.php
@@ -9,7 +9,7 @@ include $path2root . '/inc/config.php';
 <html lang="de">
 <head>
     <title>Administrationsbereich Ferienhaus - Wille</title>
-    <link rel="stylesheet" type="text/css" href="/css/admin.css" />
+    <link rel="stylesheet" type="text/css" href="/css/admin.css?ts=<?php echo time(); ?>" />
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
 </head>
 <body>
diff --git a/public/index.php b/public/index.php
index d42a87a..5d367a9 100644
--- a/public/index.php
+++ b/public/index.php
@@ -16,7 +16,7 @@ if (isset($_GET['section']) and isset($titel[$_GET['section']])) {
 <html lang="de">
 <head>
     <title><?php echo $temp_titel; ?></title>
-    <link rel="stylesheet" type="text/css" href="css/page.css" />
+    <link rel="stylesheet" type="text/css" href="css/page.css?ts=<?php echo time(); ?>" />
     <meta name="description" content="Ferienhaus Wille, Silvi Jörg" />
     <meta name="keywords" content="Ferienhaus Wille, Hindelang, Silvi Jörg" />
     <meta name="generator" content="Christian Steinle" />
