diff --git a/.github/workflows/pypi-publish.yml b/.github/workflows/pypi-publish.yml
index 5e2678f..63de745 100644
--- a/.github/workflows/pypi-publish.yml
+++ b/.github/workflows/pypi-publish.yml
@@ -30,6 +30,9 @@ jobs:
 
   pypi-publish:
     name: Publish release to PyPI
+    if: startsWith(github.ref, 'refs/tags/')  # only publish to PyPI on tag pushes
+    needs:
+    - build
     runs-on: ubuntu-latest
     environment:
       name: pypi