diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index b9ca426..d0af1c4 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -99,7 +99,7 @@ jobs:
 
       - name: Upload coverage data
         if: ${{ startsWith(matrix.passed_name, 'py') }}
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           name: ${{ matrix.passed_name }}
           fail_ci_if_error: false # see https://github.com/codecov/codecov-action/issues/598