diff --git a/openvpn-status-web.gemspec b/openvpn-status-web.gemspec
index 1d8d0c9..f3bcbbc 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', '~> 1.7.0'
+  s.add_development_dependency 'rubocop', '~> 1.8.1'
   s.add_development_dependency 'rubocop-rake', '~> 0.5.1'
   s.add_development_dependency 'rubocop-rspec', '~> 2.1.0'
   s.add_development_dependency 'solargraph', ' ~> 0.40.0'