diff --git a/resources/index.html b/resources/index.html
index 962d635..259b3e7 100644
--- a/resources/index.html
+++ b/resources/index.html
@@ -2,11 +2,11 @@
 <html>
     <head>
         <title>Newsletters</title>
-        <link rel="alternate" type="application/atom+xml" title="ATOM feed" href="./feed.atom" />
+        <link rel="alternate" type="application/atom+xml" title="ATOM feed" href="./feed.xml" />
     </head>
     <body>
         <h1>Newsletters 2 Web</h1>
-        <p>The real feed can be found at <a href="./feed.atom">feed.atom</a></p>
+        <p>The real feed can be found at <a href="./feed.xml">feed.xml</a></p>
         <p>Nothing to see here.</p>
         <p>This is a public landing page for an instance of the
             <a href="https://code.kiers.eu/newsletter-to-web/newsletter-to-web">Newsletters 2 Web</a>
diff --git a/src/cli.rs b/src/cli.rs
index 5c69ea4..0df27c2 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -32,7 +32,7 @@ pub(crate) enum Command {
         /// Host name hosting the feed
         hostname: String,
         /// Feed file
-        #[clap(value_parser, default_value = "output/feed.atom")]
+        #[clap(value_parser, default_value = "output/feed.xml")]
         filename: PathBuf,
         /// Create an HTML file for each message
         #[clap(short, long, value_parser, default_value_t = false)]
