diff --git a/tpl/tplimpl/embedded/templates/sitemap.xml b/tpl/tplimpl/embedded/templates/sitemap.xml
index de1f467d1..62be43faa 100644
--- a/tpl/tplimpl/embedded/templates/sitemap.xml
+++ b/tpl/tplimpl/embedded/templates/sitemap.xml
@@ -1,4 +1,4 @@
-{{ printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
+{{ printf "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>" | safeHTML }}
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
   xmlns:xhtml="http://www.w3.org/1999/xhtml">
   {{ range where .Pages "Sitemap.Disable" "ne" true }}