diff --git a/.github/workflows/unit_test_coverage.yml b/.github/workflows/unit_test_coverage.yml
index 1a7fece..f8cf494 100644
--- a/.github/workflows/unit_test_coverage.yml
+++ b/.github/workflows/unit_test_coverage.yml
@@ -96,7 +96,9 @@ jobs:
         with:
           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
+          
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