diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index a441586..b4c4d19 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -1,6 +1,6 @@
 <title>{{ .Title}}</title>
-<link rel="stylesheet" href="{{.Site.BaseURL}}/css/theme.css">
-<link rel="stylesheet" href="{{.Site.BaseURL}}/style.css">
+<link rel="stylesheet" href="{{.Site.BaseURL}}/css/theme.css?d={{.Date.Unix}}">
+<link rel="stylesheet" href="{{.Site.BaseURL}}/style.css?d={{.Date.Unix}}">
 <meta charset="utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1" />
 <meta name="title" content="{{ .Site.Title }}">