diff --git a/layouts/_default/sitemap.xml b/layouts/_default/sitemap.xml
index 39dd94da0dff..9e01e7995d29 100644
--- a/layouts/_default/sitemap.xml
+++ b/layouts/_default/sitemap.xml
@@ -2,9 +2,15 @@
   xmlns:xhtml="http://www.w3.org/1999/xhtml">
   {{ range .Data.Pages }}
   {{ if not (or .Params.private .Params.block_external_search_index .Params.redirect_to .Params.redirect_url (not (partial "taxonomy-indexable.html" .))) }}
+  {{ $lastmod := .Lastmod }}
+  {{ if in (slice "home" "section" "taxonomy" "term") .Kind }}
+  {{ range .RegularPagesRecursive }}
+  {{ if .Lastmod.After $lastmod }}{{ $lastmod = .Lastmod }}{{ end }}
+  {{ end }}
+  {{ end }}
   <url>
-    <loc>{{ .Site.Params.canonicalURL }}{{ .RelPermalink }}</loc>{{ if not .Lastmod.IsZero }}
-    <lastmod>{{ safeHTML ( .Lastmod.Format "2006-01-02T15:04:05-07:00" ) }}</lastmod>{{ end }}{{ with .Sitemap.ChangeFreq }}
+    <loc>{{ .Site.Params.canonicalURL }}{{ .RelPermalink }}</loc>{{ if not $lastmod.IsZero }}
+    <lastmod>{{ safeHTML ( $lastmod.Format "2006-01-02T15:04:05-07:00" ) }}</lastmod>{{ end }}{{ with .Sitemap.ChangeFreq }}
     <changefreq>{{ . }}</changefreq>{{ end }}{{ if ge .Sitemap.Priority 0.0 }}
     <priority>{{ .Sitemap.Priority }}</priority>{{ end }}{{ if .IsTranslated }}{{ range .Translations }}
     <xhtml:link