diff --git a/dyndnsd.gemspec b/dyndnsd.gemspec
index 897e6d6..05bc60a 100644
--- a/dyndnsd.gemspec
+++ b/dyndnsd.gemspec
@@ -39,6 +39,6 @@ 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', '~> 0.89.0'
+  s.add_development_dependency 'rubocop', '~> 0.90.0'
   s.add_development_dependency 'solargraph'
 end