diff --git a/robots.txt b/robots.txt
index e832139..52fee62 100644
--- a/robots.txt
+++ b/robots.txt
@@ -3,4 +3,4 @@ layout: null
 ---
 User-agent: *
 Allow: /
-Sitemap: {{ site.url }}/sitemap.xml
+Sitemap: {{ "/sitemap.xml" | prepend: site.url }}