diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index c5f0232..c0aafd9 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -41,6 +41,7 @@ jobs:
   publish-to-pypi:
     name: >-
       Publish Python distribution to PyPI
+    if: startsWith(github.ref, 'refs/tags/')  # only publish to PyPI on tag pushes
     needs:
     - build
     runs-on: ubuntu-latest