diff --git a/openvpn-status-web.gemspec b/openvpn-status-web.gemspec
index 3ff8389..cd77a49 100644
--- a/openvpn-status-web.gemspec
+++ b/openvpn-status-web.gemspec
@@ -37,7 +37,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rack-test'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec'
-  s.add_development_dependency 'rubocop', '~> 1.27.0'
+  s.add_development_dependency 'rubocop', '~> 1.28.1'
   s.add_development_dependency 'rubocop-rake', '~> 0.6.0'
   s.add_development_dependency 'rubocop-rspec', '~> 2.10.0'
   s.add_development_dependency 'solargraph', '~> 0.44.0'