diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index fb27871..dcbd313 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -3,7 +3,10 @@ name: cd
 on:
   push:
     tags:
-      - 'v[0-9]+.[0-9]+.[0-9]+'
+      - "v[0-9]+.[0-9]+.[0-9]+"
+
+env:
+  PYTHON_VERSION: "3.10"
 
 permissions:
   contents: read
@@ -16,18 +19,28 @@ jobs:
       contents: write
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: softprops/action-gh-release@v1
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Version release on Github
+        uses: softprops/action-gh-release@v2
+        with:
+          make_latest: "true"
 
   pypi-push:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v4
 
-      - uses: actions/setup-python@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: "poetry"
 
-      - name: Install dependencies
-        run: pip install poetry
+      - name: Install poetry
+        run: pipx install poetry
 
       - name: Setup poetry
         run: |
@@ -39,7 +52,7 @@ jobs:
           source .venv/bin/activate
           poetry build
 
-      - name: Upload package
+      - name: Upload package to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
           password: ${{ secrets.PYPI_TOKEN }}
@@ -47,7 +60,7 @@ jobs:
   docker-push:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Login to Docker Hub
         uses: docker/login-action@v2
@@ -57,7 +70,7 @@ jobs:
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
-      
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
@@ -66,8 +79,8 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           images: ${{ secrets.DOCKERHUB_USERNAME }}/clairvoyance
-      
-      - name: Build and push
+
+      - name: Build container and push it to Docker Hub
         id: docker_build
         uses: docker/build-push-action@v3
         with:
@@ -77,6 +90,6 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           platforms: linux/amd64,linux/arm64
-          
+
       - name: Image digest
         run: echo ${{ steps.docker_build.outputs.digest }}
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0ec1376..137bebb 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -3,116 +3,121 @@ name: tests
 on:
   push:
     paths-ignore:
-      - 'README.md'
-      - 'LICENSE'
-      - '.gitignore'
+      - "README.md"
+      - "LICENSE"
+      - ".gitignore"
     branches:
       - main
   pull_request:
     paths-ignore:
-      - 'README.md'
-      - 'LICENSE'
-      - '.gitignore'
+      - "README.md"
+      - "LICENSE"
+      - ".gitignore"
     branches:
       - main
 
-permissions:
-  contents: read
-
 env:
+  PYTHON_VERSION: "3.10"
+  NODE_VERSION: "20"
   MODULE_NAME: clairvoyance
   MIN_TEST_COV: 0
   SERVER: http://localhost:4000
 
+permissions:
+  contents: read
+
 jobs:
   unit-tests:
-
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
-      with:
-        python-version: '3.10'
-    - name: Install dependencies
-      run: |
-        pip install poetry
-    - name: Setup poetry
-      run: |
-        poetry config virtualenvs.in-project true
-        poetry install
-    - name: Run tests
-      run: |
-        source .venv/bin/activate
-        pytest --cov=$MODULE_NAME --cov-report=xml --cov-fail-under=$MIN_TEST_COV tests
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install and configure poetry
+        run: |
+          pipx install poetry
+          poetry config virtualenvs.in-project true
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: "poetry"
+      - name: Setup poetry
+        run: poetry install
+      - name: Run tests
+        run: |
+          source .venv/bin/activate
+          pytest --cov=$MODULE_NAME --cov-report=xml --cov-fail-under=$MIN_TEST_COV tests
 
   system-tests:
-
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
-      with:
-        python-version: '3.10'
-    - name: Install dependencies
-      run: |
-        pip install poetry
-    - name: Setup poetry
-      run: |
-        poetry config virtualenvs.in-project true
-        poetry install
-    - uses: actions/setup-node@v2
-      with:
-        node-version: '16'
-    - name: Install deps and run server
-      run: |
-        cd tests/apollo-server
-        npm install
-        node src/index.js &
-    - name: Wait for server
-      run: |
-        for i in {0..10}; do
-          echo "Sleep for 1 second ..."
-          sleep 1
-          if curl -s -o /dev/null "$SERVER"; then
-            echo "$SERVER returned HTTP response!"
-            break
-          fi
-          if [ $i -eq 10 ]; then
-            echo "Server did not respond after 10 seconds!"
-            exit 1
-          fi
-        done
-    - name: Test with pytest
-      run: |
-        source .venv/bin/activate
-        python -m unittest tests/system.py
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install and configure poetry
+        run: |
+          pipx install poetry
+          poetry config virtualenvs.in-project true
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: "poetry"
+      - name: Setup poetry
+        run: poetry install
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: "npm"
+          cache-dependency-path: tests/apollo-server/
+      - name: Install deps and run server
+        run: |
+          cd tests/apollo-server/
+          npm ci
+          node src/index.js &
+      - name: Wait for server
+        run: |
+          for i in {0..10}; do
+            echo "Sleep for 1 second ..."
+            sleep 1
+            if curl -s -o /dev/null "$SERVER"; then
+              echo "$SERVER returned HTTP response!"
+              break
+            fi
+            if [ $i -eq 10 ]; then
+              echo "Server did not respond after 10 seconds!"
+              exit 1
+            fi
+          done
+      - name: Test with pytest
+        run: |
+          source .venv/bin/activate
+          python -m unittest tests/system.py
 
   lint:
-
     runs-on: ubuntu-latest
 
     if: false
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
-      with:
-        python-version: '3.10'
-    - name: Install dependencies
-      run: |
-        pip install poetry
-    - name: Setup poetry
-      run: |
-        poetry config virtualenvs.in-project true
-        poetry install
-    - name: Run lint
-      if: always()
-      run: |
-        source .venv/bin/activate
-        isort -m 9 --line-length 160 $MODULE_NAME tests --check-only
-        pylint --load-plugins pylint_quotes $MODULE_NAME tests
-        docformatter --wrap-summaries 160 --wrap-descriptions 160 -cr $MODULE_NAME tests
-        yapf -rd $MODULE_NAME tests
-        mypy -V
-        mypy $MODULE_NAME tests
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install and configure poetry
+        run: |
+          pipx install poetry
+          poetry config virtualenvs.in-project true
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: "poetry"
+      - name: Setup poetry
+        run: poetry install
+      - name: Run lint
+        if: always()
+        run: |
+          source .venv/bin/activate
+          isort -m 9 --line-length 160 $MODULE_NAME tests --check-only
+          pylint --load-plugins pylint_quotes $MODULE_NAME tests
+          docformatter --wrap-summaries 160 --wrap-descriptions 160 -cr $MODULE_NAME tests
+          yapf -rd $MODULE_NAME tests
+          mypy -V
+          mypy $MODULE_NAME tests