diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 51be3d6..7e74de6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -68,6 +68,7 @@ jobs:
         run: |
           cargo tarpaulin --verbose --timeout 120 --out xml
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true
+          token: ${{ secrets.CODECOV_TOKEN }} # required