diff --git a/radius-spec.gemspec b/radius-spec.gemspec
index c8a5fd3..fade304 100644
--- a/radius-spec.gemspec
+++ b/radius-spec.gemspec
@@ -33,7 +33,7 @@ Gem::Specification.new do |spec|
 
   spec.add_runtime_dependency "rspec", "~> 3.7"
   spec.add_runtime_dependency "rubocop", ">= 1.25", "< 1.53"
-  spec.add_runtime_dependency "rubocop-rails", ">= 2.13", "< 2.20"
+  spec.add_runtime_dependency "rubocop-rails", ">= 2.13", "< 2.21"
 
   spec.add_development_dependency "bundler", ">= 2.2.10"
   spec.add_development_dependency "rake", ">= 12.0", "< 14.0"