diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d4b90c3..b8d81c5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,44 +3,15 @@ name: Python CI
 on: [push, pull_request]
 
 jobs:
-  lint-and-mypy:
-    name: Lint & mypy
-    runs-on: ubuntu-latest
-    timeout-minutes: 5
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup Python environment
-        uses: actions/setup-python@v4
-        with:
-          python-version: "3.9"
-          architecture: "x64"
-
-      - name: Install
-        run: |
-          pip install -e .[lint]
-
-      - name: Validate
-        run: |
-          isort --check-only src/ tests/
-          black --check --line-length 100 .
-          mypy
-
   build-and-test:
     name: Test & build (py${{ matrix.python-version }} on ${{ matrix.os }})
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [macos-latest]
         python-version:
           - "3.12"
-          - "3.11"
-          - "3.10"
-          - "3.9"
-          - "3.8"
-          - "3.7"
 
     steps:
       - name: Checkout
@@ -50,15 +21,14 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-          architecture: "x64"
-
-      - name: Install
-        run: |
-          pip install -e .[test]
-          pip install -e .[build]
-
-      - name: Test
-        run: py.test -vvs
 
-      - name: Build
-        run: python setup.py build sdist bdist_wheel
+#      - name: Install
+#        run: |
+#          pip install -e .[test]
+#          pip install -e .[build]
+#
+#      - name: Test
+#        run: py.test -vvs
+#
+#      - name: Build
+#        run: python setup.py build sdist bdist_wheel
diff --git a/.github/workflows/pypi-release.yml b/.github/workflows/pypi-release.yml
index 2e84d52..8ab4839 100644
--- a/.github/workflows/pypi-release.yml
+++ b/.github/workflows/pypi-release.yml
@@ -26,7 +26,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: 3.11