diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index 538e44d7..00167900 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -45,6 +45,7 @@ jobs:
       if: contains(matrix.os, 'macos')
       run: |
         cd scripts
+        brew update --preinstall # temporary workaround for https://github.com/Homebrew/homebrew-bundle/issues/751
         brew bundle
         brew tap iveney/mocha
         brew install realpath