diff --git a/layouts/_default/rss.xml b/layouts/_default/rss.xml
index 66784b8..6de6dd0 100644
--- a/layouts/_default/rss.xml
+++ b/layouts/_default/rss.xml
@@ -31,7 +31,7 @@
 {{- $pages = $pages | first $limit }}
 {{- end }}
 {{- printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
-<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
   <channel>
     <title>{{ if eq .Title .Site.Title }}{{ .Site.Title }}{{ else }}{{ with .Title }}{{ . }} on {{ end }}{{ .Site.Title }}{{ end }}</title>
     <link>{{ .Permalink }}</link>