diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..1a218f5
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,15 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: ".github/workflows" # Location of package manifests
+    schedule:
+      interval: "monthly"
+    groups:
+      actions:
+        patterns:
+          - "*"
diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 7d0087a..6531a50 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -35,16 +35,19 @@ jobs:
           - os: ubuntu-latest
             python-version: "3.11"
             toxenv: py311-test-v2deps-sphinx70
+          - os: ubuntu-latest
+            python-version: "3.12"
+            toxenv: py312-test-sphinx80
           - os: macos-latest
             python-version: "3.11"
             toxenv: py311-test-sphinxdev
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install Tox
diff --git a/tox.ini b/tox.ini
index f642d32..5b0ce72 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{37,38,39,310,311}-test{-v2deps}{-sphinx30,-sphinx35,-sphinx40,-sphinx50,-sphinx60,-sphinx70,-sphinxdev}
+    py{37,38,39,310,311}-test{-v2deps}{-sphinx30,-sphinx35,-sphinx40,-sphinx50,-sphinx60,-sphinx70,-sphinx80,-sphinxdev}
     codestyle
 requires =
     setuptools >= 30.3.0
@@ -23,6 +23,7 @@ deps =
     sphinx50: sphinx==5.0.*
     sphinx60: sphinx==6.0.*
     sphinx70: sphinx==7.0.*
+    sphinx80: sphinx==8.0.*
     sphinxdev: git+https://github.com/sphinx-doc/sphinx#egg=sphinx
 
 commands =