diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index eaf543e..9e525bc 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -16,13 +16,13 @@ jobs:
           fetch-depth: 0 # Includes getting tags
 
       - name: Cache $HOME/.local # Significantly speeds up Poetry Install
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.local
           key: dotlocal-${{ runner.os }}-${{ hashFiles('.github/workflows/deploy.yml') }}
 
       - name: Set up python 3.12
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.12"
 
@@ -39,7 +39,7 @@ jobs:
 
       - name: Load cached venv
         id: cached-poetry-dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}
@@ -60,7 +60,7 @@ jobs:
           poetry config pypi-token.pypi ${{ secrets.PYPI_TOKEN }}
           poetry publish
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         if: always()
         with:
           name: dist
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index d4b4d0b..08a43fb 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -44,10 +44,10 @@ jobs:
       #       check-out repo and set-up python
       #----------------------------------------------
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -66,7 +66,7 @@ jobs:
       #----------------------------------------------
       - name: Load cached venv
         id: cached-poetry-dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: .venv
           key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 68306c4..d76941f 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,20 +1,26 @@
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+# Derived from: https://docs.readthedocs.io/en/stable/build-customization.html#install-dependencies-with-poetry
 
 # Required
 version: 2
 
-# Set the version of Python and other tools you might need
 build:
-  os: ubuntu-20.04
-  tools: { python: "3.10" }
+  os: "ubuntu-22.04"
+  tools:
+    python: "3.10"
   jobs:
     post_create_environment:
+      # Install poetry
+      # https://python-poetry.org/docs/#installing-manually
       - pip install poetry
-      - poetry config virtualenvs.create false
       - poetry self add poetry-dynamic-versioning
     post_install:
-      - poetry install --without=dev
+      # Install dependencies with 'docs' dependency group
+      # https://python-poetry.org/docs/managing-dependencies/#dependency-groups
+      # VIRTUAL_ENV needs to be set manually for now.
+      # See https://github.com/readthedocs/readthedocs.org/pull/11152/
+      - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH poetry install --without=dev --with=docs
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx: