diff --git a/.github/workflows/buildAndUploadPyPi.yml b/.github/workflows/buildAndUploadPyPi.yml
index 73ee3c014..291bbe739 100644
--- a/.github/workflows/buildAndUploadPyPi.yml
+++ b/.github/workflows/buildAndUploadPyPi.yml
@@ -17,16 +17,20 @@ jobs:
 #        os: [ubuntu-latest, ubuntu-24.04-arm, windows-latest, windows-11-arm, macos-13, macos-14]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
+      # - name: Install uv
+      #   uses: astral-sh/setup-uv@v7
+
       - name: Build wheels
-        uses: pypa/cibuildwheel@v3.0.0
+        uses: pypa/cibuildwheel@v3.4.0
         env:
           CIBW_PLATFORM: ${{ matrix.platform || 'auto' }}
+          # CIBW_BUILD_FRONTEND: "build[uv]"
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: cibw-wheels-${{ matrix.os }}-${{ strategy.job-index }}
           path: ./wheelhouse/*.whl
@@ -35,12 +39,12 @@ jobs:
     name: Build source distribution
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.12
       - name: Install dependencies
@@ -58,7 +62,7 @@ jobs:
 #      - name: Build sdist
 #        run: pipx run build --sdist
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: cibw-sdist
           path: dist/*.tar.gz
@@ -73,7 +77,7 @@ jobs:
     # or, alternatively, upload to PyPI on every tag starting with 'v' (remove on: release above to use this)
     # if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           # unpacks all CIBW artifacts into dist/
           pattern: cibw-*
diff --git a/pyproject.toml b/pyproject.toml
index afe62dd2b..dd7e4c5be 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [build-system]
 # Cython dependency is optional, see setup.py for details.
 # For the package (run-time) dependencies, see setup.cfg.
-requires = ["setuptools", "numpy<2.0", "Cython>=3.0.10", "setuptools-scm"]
+requires = ["setuptools", "numpy", "Cython>=3.0.10", "setuptools-scm"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -64,7 +64,7 @@ version_file = "avaframe/RELEASE-VERSION.txt"
 #build = ["cp312-*"]
 skip = ["*musllinux*","*-win32"]
 build-verbosity = 1
-before-build = "pip install 'cython>=3.0.10' 'numpy<2.0'"
+# before-build = "uv pip install --system 'cython>=3.0.10' 'numpy<2.0'"
 
 
 [tool.cibuildwheel.linux]