diff --git a/_layouts/base.html b/_layouts/base.html
index 200ac6f..436e232 100644
--- a/_layouts/base.html
+++ b/_layouts/base.html
@@ -4,7 +4,7 @@
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="description" content="natronics.org">
-    <link rel="stylesheet" href="/assets/style.css">
+    <link rel="stylesheet" href="/assets/style.css?{{ site.time | date: '%s' }}">
     <title>{{ page.title }}</title>
   </head>
   <body>
