diff --git a/.github/workflows/package-release.yml b/.github/workflows/package-release.yml
index 48ed767e..3973e8dd 100644
--- a/.github/workflows/package-release.yml
+++ b/.github/workflows/package-release.yml
@@ -4,7 +4,7 @@ on:
     types: [created]
 jobs:
   release:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v1
     - name: Setup Python
@@ -24,4 +24,4 @@ jobs:
       run: twine check dist/*
     
     - name: Publish to PyPI
-      run: twine upload dist/* -u ${{ secrets.PYPI_USER }} -p ${{ secrets.PYPI_PASSWORD }}
\ No newline at end of file
+      run: twine upload dist/* -u ${{ secrets.PYPI_USER }} -p ${{ secrets.PYPI_PASSWORD }}