diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 878ac28..3ab9a1e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,7 +42,7 @@ jobs:
       - name: Upload coverage to Codecov
         # Only upload from one OS to avoid double-counting.
         if: matrix.os == 'ubuntu-latest'
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           files: ./coverage.out
           flags: unittests