diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index 1edf550..dfff3c3 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -1,6 +1,9 @@
 name: Publish Python 🐍 distributions 📦 to PyPI and TestPyPI
 
-on: push
+on:
+  push:
+    branches:
+      - master
 jobs:
   build-n-publish:
     name: Build and publish Python 🐍 distributions 📦 to PyPI and TestPyPI
@@ -30,6 +33,7 @@ jobs:
       with:
         password: ${{ secrets.test_pypi_password }}
         repository_url: https://test.pypi.org/legacy/
+        skip_existing: true
     - name: Publish distribution 📦 to PyPI
       if: startsWith(github.ref, 'refs/tags')
       uses: pypa/gh-action-pypi-publish@master