diff --git a/website/build.py b/website/build.py
index 3b74f533..d7ed42c8 100644
--- a/website/build.py
+++ b/website/build.py
@@ -428,9 +428,11 @@ def build(repo_root: Path) -> None:
     llms_txt = build_llms_txt(llms_template, readme_text, stars_data)
     (site_dir / "robots.txt").write_text(build_robots_txt(), encoding="utf-8")
     sitemap_date = build_date.date().isoformat()
-    sitemap_urls = [(SITE_URL, sitemap_date)] + [
-        (category_public_url(category), sitemap_date) for category in categories
-    ]
+    sitemap_urls = [(SITE_URL, sitemap_date)]
+    sitemap_urls.extend((category_public_url(c), sitemap_date) for c in categories)
+    sitemap_urls.extend((group_public_url(g["slug"]), sitemap_date) for g in parsed_groups)
+    for cat_slug, sub_slug in sorted(seen_subcats):
+        sitemap_urls.append((subcategory_public_url(cat_slug, sub_slug), sitemap_date))
     write_sitemap_xml(site_dir / "sitemap.xml", sitemap_urls)
     (site_dir / "index.md").write_text(markdown_index, encoding="utf-8")
     (site_dir / "llms.txt").write_text(llms_txt, encoding="utf-8")
diff --git a/website/tests/test_build.py b/website/tests/test_build.py
index 7122e255..ff22d717 100644
--- a/website/tests/test_build.py
+++ b/website/tests/test_build.py
@@ -195,9 +195,13 @@ class TestBuild:
 
             ---
 
+            **Tools**
+
             ## Widgets
 
-            - [w1](https://example.com) - A widget.
+            - Sync
+
+                - [w1](https://example.com) - A widget.
 
             # Contributing
 
@@ -225,11 +229,10 @@ class TestBuild:
         lastmods = [lastmod.text for lastmod in root.findall("sitemap:url/sitemap:lastmod", ns)]
 
         assert root.tag == "{http://www.sitemaps.org/schemas/sitemap/0.9}urlset"
-        assert locs == [
-            "https://awesome-python.com/",
-            "https://awesome-python.com/categories/widgets/",
-        ]
-        assert len(lastmods) == 2
+        assert "https://awesome-python.com/" in locs
+        assert "https://awesome-python.com/categories/widgets/" in locs
+        assert "https://awesome-python.com/categories/tools/" in locs
+        assert "https://awesome-python.com/categories/widgets/sync/" in locs
         assert all(start_date <= date.fromisoformat(lastmod) <= end_date for lastmod in lastmods)
         assert all(loc.startswith("https://awesome-python.com/") for loc in locs)
         assert all("?" not in loc for loc in locs)