app/views/sitemaps/sitemap.builder in dynamic_sitemaps-1.0.4 vs app/views/sitemaps/sitemap.builder in dynamic_sitemaps-1.0.5

@@ -3,10 +3,10 @@
   @urls.each do |url|
     xml.url do
       xml.loc url.loc
       
       if url.last_mod
-        xml.lastmod url.last_mod.to_date
+        xml.lastmod url.last_mod.to_datetime.strftime("%Y-%m-%dT%H:%M:%S%:z")
       end
       
       if url.change_freq
         xml.changefreq url.change_freq
       end