diff --git a/Gemfile b/Gemfile
index f208eff..5c5453e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source "https://rubygems.org"
 
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
 
-gem "mad_rubocop"
+gem "mad_rubocop", ">= 4.0.0"
 gem "pry"
 gem "psych", "~> 3"
 gem "rubocop", "~> 1.25.0"