diff --git a/.github/workflows/auto_doc.yml b/.github/workflows/auto_doc.yml
index 983639f3..bdc52968 100644
--- a/.github/workflows/auto_doc.yml
+++ b/.github/workflows/auto_doc.yml
@@ -12,10 +12,7 @@ jobs:
     permissions:
       contents: write
     steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-python@v5
-      with:
-        python-version: '3.10'
+    - uses: actions/checkout@v3
     - name: Build HTML
       uses: ammaraskar/sphinx-action@master
       with:
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 5725f809..e2d4c4c2 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -4,7 +4,7 @@
 #
 #    pip-compile requirements.in
 #
-alabaster==0.7.16
+alabaster==0.7.13
     # via sphinx
 babel==2.14.0
     # via sphinx