diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c15e362..2bf1536 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -71,7 +71,7 @@ jobs:
       - name: Run tests
         run: uv run pytest --cov=fluxopt --cov-report=xml --cov-report=term-missing
 
-      - uses: codecov/codecov-action@v5
+      - uses: codecov/codecov-action@v6
         if: matrix.python-version == '3.12'
         with:
           token: ${{ secrets.CODECOV_TOKEN }}