diff --git a/docs/sitemap.xml b/docs/sitemap.xml
index 28faa11..1a98eab 100644
--- a/docs/sitemap.xml
+++ b/docs/sitemap.xml
@@ -2,7 +2,7 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
 <url>
 <loc>https://tbsk-orch.com/</loc>
-<lastmod>2024-11-04</lastmod>
+<lastmod>2024-12-01</lastmod>
 </url>
 <url>
 <loc>https://tbsk-orch.com/boshu.html</loc>
@@ -10,7 +10,7 @@
 </url>
 <url>
 <loc>https://tbsk-orch.com/concert.html</loc>
-<lastmod>2024-11-04</lastmod>
+<lastmod>2024-12-01</lastmod>
 </url>
 <url>
 <loc>https://tbsk-orch.com/fanq.html</loc>
@@ -18,7 +18,7 @@
 </url>
 <url>
 <loc>https://tbsk-orch.com/past.html</loc>
-<lastmod>2024-08-26</lastmod>
+<lastmod>2024-12-01</lastmod>
 </url>
 <url>
 <loc>https://tbsk-orch.com/sensei.html</loc>