diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b014de9..4732ad5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -278,8 +278,10 @@ jobs:
 
       - name: Publish package to PyPI
         if: |
-          startsWith(github.event.inputs.tag, 'v') ||
-          startsWith(github.ref,'refs/tags/v') ||steps.src_changes.outputs.changed == 'true'
+          (startsWith(github.event.inputs.tag, 'v') ||
+          startsWith(github.ref,'refs/tags/v') ||
+          steps.src_changes.outputs.changed == 'true') &&
+          (github.event_name != 'pull_request')
         env:
           TWINE_USERNAME: __token__
           TWINE_PASSWORD: ${{ secrets.PYPI }}