diff --git a/.github/workflows/cov.yml b/.github/workflows/cov.yml
index 9f69dd9..53eb524 100644
--- a/.github/workflows/cov.yml
+++ b/.github/workflows/cov.yml
@@ -16,7 +16,9 @@ jobs:
       - name: Generate code coverage
         run: cargo llvm-cov --all-features --lcov --output-path lcov.info
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         with:
           files: lcov.info
           fail_ci_if_error: true