diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0861337..99d810c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -74,12 +74,20 @@ jobs:
           name: wheels-${{ runner.os }}
       - name: Publish (Release)
         if: ${{  github.event_name== 'release' && runner.os == 'Linux' }}
+        env:
+          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }} 
         run: |
+          pip install twine
           python setup.py sdist
           twine upload dist/*
       - name: Publish (Release)
         if: github.event_name == 'release'
+        env:
+          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }} 
         run: |
+          pip install twine
           twine upload dist/*.whl
           twine upload dist/*.whl
           twine upload dist/*.whl