diff --git a/radius-spec.gemspec b/radius-spec.gemspec
index 8e243de..09d03a3 100644
--- a/radius-spec.gemspec
+++ b/radius-spec.gemspec
@@ -32,7 +32,7 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 2.5" # rubocop:disable Gemspec/RequiredRubyVersion
 
   spec.add_runtime_dependency "rspec", "~> 3.7"
-  spec.add_runtime_dependency "rubocop", ">= 1.25", "< 1.56"
+  spec.add_runtime_dependency "rubocop", ">= 1.25", "< 1.57"
   spec.add_runtime_dependency "rubocop-rails", ">= 2.13", "< 2.21"
 
   spec.add_development_dependency "bundler", ">= 2.2.10"