diff --git a/Gemfile b/Gemfile
index 05d7bc5..ac4c9e5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,5 +11,5 @@ group :development do
   gem "mdl", "0.11.0"
   gem "minitest", "~> 5.14"
   gem "minitest-bisect", "~> 1.5"
-  gem "rubocop", "~> 1.0"
+  gem "rubocop", "~> 1.36", ">= 1.36.0"
 end