diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c07ffce..472717f 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -75,7 +75,7 @@ jobs:
 #          cd doc && mkdir doctest && sphinx-build -E -n -b doctest ./source ./doctest && cd ..
 
       - name: Upload unittest coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           flags: unittests
           file: ./coverage.xml