diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 074d599e..aed51efc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -132,7 +132,8 @@ jobs:
           command: tarpaulin
           args: --all-features --run-types tests --run-types doctests --workspace --out xml
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v3.1.1
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true
+          slug: al8n/fs4-rs