diff --git a/oxidized.gemspec b/oxidized.gemspec
index aa15134df..88ff0db9d 100644
--- a/oxidized.gemspec
+++ b/oxidized.gemspec
@@ -36,7 +36,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'mocha',               '~> 1.2'
   s.add_development_dependency 'pry',                 '~> 0.14.2'
   s.add_development_dependency 'rake',                '~> 13.0'
-  s.add_development_dependency 'rubocop',             '~> 1.48.0'
+  s.add_development_dependency 'rubocop',             '~> 1.56.4'
   s.add_development_dependency 'rubocop-minitest',    '~> 0.29.0'
   s.add_development_dependency 'rubocop-rake',        '~> 0.6.0'
   s.add_development_dependency 'simplecov',           '~> 0.22.0'