diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0179477..fcf7517 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -72,4 +72,7 @@ jobs:
           coverage run --include='*/rf/*' -m rf.tests
           coverage xml -o ../coverage.xml
       - name: upload coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }} # required
+          fail_ci_if_error: true