diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 27042c3..47202e2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -49,16 +49,17 @@ jobs:
       run: |
         pytest -r sx tests/
 
-      # Report coverage for oldest and newest Python tested to guard against version differences
     - name: Report core project coverage with Codecov
       if: >-
         github.event_name != 'schedule' &&
         matrix.os == 'ubuntu-latest'
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
+        fail_ci_if_error: true
         files: ./coverage.xml
         flags: unittests-${{ matrix.python-version }}
         name: pylhe
+        token: ${{ secrets.CODECOV_TOKEN }}
 
   docker: