diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9d4b54f..0d904a8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,7 +30,7 @@ jobs:
           submodules: true
 
       - name: Setup Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -41,8 +41,9 @@ jobs:
           ls -al ./dist
 
       - name: Place wheels in artifacts folder
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
+          name: windows-${{ matrix.python-version }}
           path: ./dist/*.whl
 
   build_wheels_unix:
@@ -59,7 +60,7 @@ jobs:
           submodules: true
 
       - name: Setup Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: '3.11'
 
@@ -78,8 +79,9 @@ jobs:
           ls -R dist
 
       - name: Place wheels in artifacts folder
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
+          name: ${{ matrix.os }}
           path: ./dist/*.whl
 
   test-wheels:
@@ -97,15 +99,19 @@ jobs:
         with:
           submodules: true
       - name: Setup Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Retrieve packages
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           path: dist
 
+      - name: List items
+        run: |
+          ls -alR dist
+
       - name: Test Package Installation
         run: |
           python -m pip install --upgrade pip
@@ -130,35 +136,59 @@ jobs:
           pip install ${file}
           python extern/nlopt/test/t_python.py
 
-  deploy:
-    name: deploy packages
+  deploy-test:
+    name: Deploy packages to TestPyPI
     runs-on: ubuntu-latest
     needs: test-wheels
-    if: startsWith(github.ref, 'refs/tags/')
+    if: ${{ !startsWith(github.ref, 'refs/tags/') }}
 
     steps:
       - name: Setup Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Retrieve packages
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
-          name: artifact
           path: dist
 
       - name: Install twine
         run: pip install twine
 
+      - name: List directory
+        run: |
+          ls -ltR
+
       - name: Upload packages to testpypi
         env:
-          TWINE_USERNAME: ${{ secrets.PYPI_TEST_UID }}
-          TWINE_PASSWORD: ${{ secrets.PYPI_TEST_PWD }}
-        run: python -m twine upload --skip-existing --repository testpypi dist/*
+          TWINE_USERNAME: ${{ secrets.PYPI_TEST_TOKEN_NAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_TEST_API_TOKEN }}
+        run: python -m twine upload --skip-existing --repository testpypi dist/* --verbose
+
+  deploy:
+    name: Deploy packages to PyPI
+    runs-on: ubuntu-latest
+    needs: test-wheels
+    if: startsWith(github.ref, 'refs/tags/')
+
+    steps:
+      - name: Setup Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Retrieve packages
+        uses: actions/download-artifact@v4
+        with:
+          name: artifact
+          path: dist
+
+      - name: Install twine
+        run: pip install twine
 
       - name: Upload packages to pypi
         env:
-          TWINE_USERNAME: ${{ secrets.PYPI_UID }}
-          TWINE_PASSWORD: ${{ secrets.PYPI_PWD }}
-        run: python -m twine upload --skip-existing dist/*
+          TWINE_USERNAME: ${{ secrets.PYPI_PROD_TOKEN_NAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_PROD_API_TOKEN }}
+        run: python -m twine upload --skip-existing dist/* --verbose
diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..8531a3b
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.12.2
diff --git a/extern/nlopt b/extern/nlopt
index c40b548..7a7587e 160000
--- a/extern/nlopt
+++ b/extern/nlopt
@@ -1 +1 @@
-Subproject commit c40b5486c12da6eb994984021bfbfb2ef160cbf6
+Subproject commit 7a7587e5ef1cb15f412515d852d1fc261c863e96
diff --git a/setup.py b/setup.py
index f015eb3..c1d96ca 100644
--- a/setup.py
+++ b/setup.py
@@ -5,8 +5,6 @@
 
 from extensions import NLOptBuild, NLOptBuildExtension
 
-from wheel.bdist_wheel import bdist_wheel
-
 with open("README.md") as f:
     long_description = f.read()