diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7492c7d..ce9521d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -85,7 +85,7 @@ jobs:
       -
         name: Upload coverage to Codecov
         if: matrix.python-version == '3.10'
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           # not required for public repos, but intermittently fails otherwise
           token: ${{ secrets.CODECOV_TOKEN }}