diff --git a/dyndnsd.gemspec b/dyndnsd.gemspec
index 4729579..2d8d779 100644
--- a/dyndnsd.gemspec
+++ b/dyndnsd.gemspec
@@ -38,6 +38,6 @@ 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', '~> 0.81.0'
+  s.add_development_dependency 'rubocop', '~> 0.87.1'
   s.add_development_dependency 'solargraph'
 end