diff --git a/.github/workflows/build-sphinx-docs.yml b/.github/workflows/build-sphinx-docs.yml
index 4137414..a84352c 100644
--- a/.github/workflows/build-sphinx-docs.yml
+++ b/.github/workflows/build-sphinx-docs.yml
@@ -26,6 +26,9 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          filter: blob:none
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
diff --git a/docs/conf.py b/docs/conf.py
index c93ed4a..b441083 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -141,10 +141,14 @@ def setup(app):
 html_show_sourcelink = True  # False on private repos; True on public repos
 html_theme = "pydata_sphinx_theme"
 html_title = project
-html_baseurl = "https://docs.saltproject.io/salt/install-guide/"
-
-# Extends baseurl, in combination with version value
-sitemap_locales = ["en"]
+html_baseurl = "https://docs.saltproject.io/salt/install-guide/en/latest/"
+sitemap_url_scheme = (
+    "{link}"  # lang/version now live in html_baseurl, so canonical is correct too
+)
+sitemap_locales = [
+    None
+]  # single-language site: drop redundant self-referential xhtml:link alternates
+sitemap_show_lastmod = True  # git commit time of each source .rst
 # Pages we don't care to include in generated sitemap file
 sitemap_excludes = [
     "search.html",
diff --git a/docs/requirements.txt b/docs/requirements.txt
index e69c9e2..07de705 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,7 +2,7 @@ pydata-sphinx-theme==0.20.0
 sphinx-copybutton>=0.5.2
 sphinx-design>=0.5.0
 sphinx-inline-tabs>=2023.4.21
-sphinx-sitemap==2.6.0
+sphinx-sitemap==2.9.0
 sphinx-substitution-extensions>=2022.02.16
 sphinx-tabs>=3.4.7
 sphinx>=5.3.0