diff --git a/.github/workflows/unit_test_coverage.yml b/.github/workflows/unit_test_coverage.yml
index 4884ea2..9945ff1 100644
--- a/.github/workflows/unit_test_coverage.yml
+++ b/.github/workflows/unit_test_coverage.yml
@@ -94,7 +94,8 @@ jobs:
           name: coverage
 
       - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           file: lcov.info
           fail_ci_if_error: true
+          token: ${{ secrets.CODECOV_TOKEN }} # required