diff --git a/Gemfile b/Gemfile
index 222ad82..f071fe5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,6 +12,7 @@ group :test do
   gem "chefstyle"
   gem "rake"
   gem "rspec", "~> 3.0"
+  gem "rubocop-ast", "~> 1.4.1" # Drop this dependency/version when we remove ruby-2.4 support
 end
 
 group :debug do