diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9bbed8e..f86cb7e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -110,6 +110,7 @@ jobs:
           make test-cov
       
       - name: Upload to codecov.io
+        if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
         uses: codecov/codecov-action@v1
         with:
           file: ./coverage.xml