diff --git a/book/source/conf.py b/book/source/conf.py
index 63de928..dd3cfd3 100644
--- a/book/source/conf.py
+++ b/book/source/conf.py
@@ -28,6 +28,7 @@ description = 'The essential OpenPGP guide for application developers. Learn the
 extensions = [
     'myst_parser',
     'sphinxext.opengraph',
+    'sphinx_sitemap',
 ]
 source_suffix = ['.md', '.rst']
 
@@ -82,6 +83,7 @@ html_css_files = [
     ('html/css/custom.css', {'priority': 1000})
 ]
 
+html_baseurl = 'https://openpgp.dev/book/'
 html_favicon = '_static/html/img/favicon.ico'
 html_logo = '_static/html/img/logo.svg'
 html_show_sphinx = False
@@ -108,3 +110,5 @@ ogp_custom_meta_tags = [
     f'<meta property="og:description" content="{description}" />',
 ]
 
+# sphinx sitemap https://sphinx-sitemap.readthedocs.io/en/latest/advanced-configuration.html
+sitemap_url_scheme = "{link}"