diff --git a/website/src/lib/sitemap.ts b/website/src/lib/sitemap.ts
index b58e9b22..f5b80bb9 100644
--- a/website/src/lib/sitemap.ts
+++ b/website/src/lib/sitemap.ts
@@ -7,7 +7,7 @@ function getURL(lang: string, path: string = '/') {
 
 function generateSitemap() {
     const sitemap = `<?xml version="1.0" encoding="UTF-8"?>
-<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` +
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">` +
 
         Object.keys(languages).map((lang) => `
     <url>