diff --git a/pygments.rb.gemspec b/pygments.rb.gemspec
index 7e216a28..03124a8e 100644
--- a/pygments.rb.gemspec
+++ b/pygments.rb.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'rake', '~> 13.4.1'
   s.add_development_dependency 'rspec', '~> 3.12'
-  s.add_development_dependency 'rubocop', '~> 1.90.0'
+  s.add_development_dependency 'rubocop', '~> 1.91.0'
   s.add_development_dependency 'rubocop-rake', '~> 0.6'
   s.add_development_dependency 'rubocop-rspec', '~> 3.0'