diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 3e1d1c4..d9d104d 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -24,7 +24,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         timeout-minutes: 15
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           name: Unit-Tests-${{matrix.smalltalk}}
           token: ${{ secrets.CODECOV_TOKEN }}