diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 514966a..147aaf3 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -14,11 +14,23 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
+      - name: Set up python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.11'
+      - name: Load cached Poetry installation
+        id: cached-poetry
+        uses: actions/cache@v3
+        with:
+          path: ~/.local  # the path depends on the OS
+          key: poetry-0  # increment to reset cache
       - name: Install poetry
-        uses: snok/install-poetry@v1.5.1
+        uses: snok/install-poetry@v1
+        if: steps.cached-poetry.outputs.cache-hit != 'true'
         with:
           virtualenvs-create: true
           virtualenvs-in-project: true
+          version: latest
       - name: Load cached venv
         id: cached-poetry-dependencies
         uses: actions/cache@v2
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
deleted file mode 100644
index 7ca629a..0000000
--- a/.readthedocs.yaml
+++ /dev/null
@@ -1,32 +0,0 @@
-# .readthedocs.yaml
-# Read the Docs configuration file
-# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
-
-# Required
-version: 2
-
-# Build documentation in the docs/ directory with Sphinx
-sphinx:
-   configuration: src/conf.py
-
-# If using Sphinx, optionally build your docs in additional formats such as PDF
-# formats:
-#    - pdf
-
-# Optionally declare the Python requirements required to build your docs
-build:
-  os: ubuntu-22.04
-  tools:
-    python: "3.9"
-    nodejs: "16"
-  jobs:
-    post_create_environment:
-      - pip install poetry
-      - poetry config virtualenvs.create false
-    post_install:
-      - poetry install
-      - npm install -g @mermaid-js/mermaid-cli
-
-formats:
-  - epub
-  - pdf
\ No newline at end of file