diff --git a/setup/setup_new_mac_machine.sh b/setup/setup_new_mac_machine.sh
index 7dc593a..cd72aa7 100755
--- a/setup/setup_new_mac_machine.sh
+++ b/setup/setup_new_mac_machine.sh
@@ -161,6 +161,9 @@ brew install homebrew/cask/docker
 brew install hadolint
 # YAML file linter
 brew install yamllint
+# GPG for signing git commits
+# https://docs.github.com/en/authentication/managing-commit-signature-verification/generating-a-new-gpg-key
+brew install gpg
 # Nice diff for git - https://github.com/dandavison/delta
 brew install git-delta
 # Run GitHub actions locally