diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8af2fa2e..b05f22cd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -94,9 +94,14 @@ jobs:
           files: lcov.info
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }} # now required for public repos
+      # Workaround for https://github.com/coverallsapp/github-action/issues/264
+      - name: Trust Coveralls Homebrew tap (Homebrew 6 requirement)
+        if: runner.os == 'macOS'
+        run: brew trust coverallsapp/coveralls
       - name: Upload coverage report to Coveralls
         uses: coverallsapp/github-action@v2
         if: ${{ !cancelled() }}
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          path-to-lcov: ./lcov.info
+          file: ./lcov.info
+          format: lcov