diff --git a/_config.ts b/_config.ts
index 47cefd2..bdd45c0 100644
--- a/_config.ts
+++ b/_config.ts
@@ -5,6 +5,7 @@ import esbuild from "lume/plugins/esbuild.ts";
 import feed from "lume/plugins/feed.ts";
 import jsx from "lume/plugins/jsx.ts";
 import minifyHTML from "lume/plugins/minify_html.ts";
+import sitemap from "lume/plugins/sitemap.ts";
 
 const site = lume({
   src: "./site",
@@ -37,6 +38,11 @@ site.use(feed({
   },
 }));
 
+site.use(sitemap({
+  // @ts-ignore: We don't want lastmods.
+  lastmod: null,
+}));
+
 site.copyRemainingFiles();
 
 export default site;