diff --git a/Gemfile b/Gemfile
index 7746ece04..fc04cde50 100644
--- a/Gemfile
+++ b/Gemfile
@@ -116,6 +116,7 @@ group :test do
   end
   # RuboCop
   gem 'rubocop', '~> 1.57.0', require: false
+  gem 'rubocop-ast', '~> 1.40.0'
   gem 'rubocop-performance', '~> 1.19.0', require: false
   gem 'rubocop-rails', '~> 2.22.1', require: false
 end