diff --git a/docusaurus.config.js b/docusaurus.config.js
index 25647b78a..c6f807d5f 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -352,6 +352,7 @@ module.exports = {
         sitemap: {
           // Per v2.0.0-alpha.72 cacheTime is now deprecated
           //cacheTime: 600 * 1000, // 600 sec - cache purge period
+          lastmod: "date",
           changefreq: "weekly",
           priority: 0.5,
         },