diff --git a/.github/workflows/cov.yaml b/.github/workflows/cov.yaml
index 8076192..14d8c80 100644
--- a/.github/workflows/cov.yaml
+++ b/.github/workflows/cov.yaml
@@ -46,7 +46,7 @@ jobs:
         uses: actions-rs/grcov@v0.1
 
       - name: Codecov.io upload
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ${{ steps.coverage.outputs.report }}