diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c28c940..5faad7c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -59,7 +59,7 @@ jobs:
         run: uv run pytest -v --cov=src/msgspec_ext --cov-report=xml --cov-report=term
 
       - name: Upload coverage
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         if: matrix.python-version == '3.12'
         with:
           file: ./coverage.xml