diff --git a/dyndnsd.gemspec b/dyndnsd.gemspec
index cbb7ea1..5dea4e4 100644
--- a/dyndnsd.gemspec
+++ b/dyndnsd.gemspec
@@ -42,7 +42,7 @@ 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', '~> 1.50.0'
+  s.add_development_dependency 'rubocop', '~> 1.51.0'
   s.add_development_dependency 'rubocop-rake', '~> 0.6.0'
   s.add_development_dependency 'rubocop-rspec', '~> 2.22.0'
   s.add_development_dependency 'solargraph', '~> 0.49.0'