diff --git a/faraday_middleware-aws-sigv4.gemspec b/faraday_middleware-aws-sigv4.gemspec
index 6b20431..e157097 100644
--- a/faraday_middleware-aws-sigv4.gemspec
+++ b/faraday_middleware-aws-sigv4.gemspec
@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'bundler'
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'rspec', '~> 3.0'
-  spec.add_development_dependency 'rubocop', '1.65.1'
+  spec.add_development_dependency 'rubocop', '1.66.1'
   spec.add_development_dependency 'rubocop-rake', '0.6.0'
   spec.add_development_dependency 'rubocop-rspec', '3.0.5'
   spec.add_development_dependency 'timecop'