diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 34e47f2..bc5d08b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,7 +33,7 @@ jobs:
           npm run test:coverage
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           files: codex-worker-mvp/coverage/lcov.info
           flags: backend