diff --git a/colorls.gemspec b/colorls.gemspec
index 044b68e..d030411 100644
--- a/colorls.gemspec
+++ b/colorls.gemspec
@@ -70,7 +70,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'ronn', '~> 0'
   spec.add_development_dependency 'rspec', '~> 3.7'
   spec.add_development_dependency 'rspec-its', '~> 1.2'
-  spec.add_development_dependency 'rubocop', '~> 0.65.0'
+  spec.add_development_dependency 'rubocop', '~> 0.66.0'
   spec.add_development_dependency 'rubocop-rspec', '~> 1.27'
   spec.add_development_dependency 'rubygems-tasks', '~> 0'
   spec.add_development_dependency 'simplecov', '~> 0.16.1'