diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 080396c..011724c 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -15,4 +15,10 @@ python:
 build:
   os: "ubuntu-22.04"
   tools:
-    python: "mambaforge-latest"
+    python: "miniforge3-latest"
+  jobs:
+    # hatch-vcs derives the version from git tags; RTD's default checkout is
+    # shallow and tagless, so fetch tags or ptgp.__version__ falls back to
+    # 0.0.0+unknown and the version selector labels break.
+    post_checkout:
+      - git fetch --tags --unshallow || true
diff --git a/docs/source/conf.py b/docs/source/conf.py
index a75643b..d150396 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -45,6 +45,8 @@
     "sphinx_design",
     "sphinx_copybutton",
     "sphinx_codeautolink",
+    "sphinx_sitemap",
+    "notfound.extension",
     "jupyter_sphinx",
     "sphinxcontrib.bibtex",
     "generate_gallery",
@@ -133,7 +135,7 @@
     "show_prev_next": True,
     "icon_links": [
         {
-            "url": "https://github.com/bwengals/ptgp",
+            "url": "https://github.com/pymc-devs/ptgp",
             "icon": "fa-brands fa-github",
             "name": "GitHub",
             "type": "fontawesome",
@@ -144,7 +146,7 @@
 github_version = version if "." in rtd_version else "main"
 html_context = {
     "github_url": "https://github.com",
-    "github_user": "bwengals",
+    "github_user": "pymc-devs",
     "github_repo": "ptgp",
     "github_version": github_version,
     "doc_path": "docs/source",