diff --git a/slimmer.gemspec b/slimmer.gemspec
index 6e88811..9ca9136 100644
--- a/slimmer.gemspec
+++ b/slimmer.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rack-test", "~> 2"
   s.add_development_dependency "rails", "~> 8"
   s.add_development_dependency "rake"
-  s.add_development_dependency "rubocop-govuk", "5.0.3"
+  s.add_development_dependency "rubocop-govuk", "5.0.4"
   s.add_development_dependency "webmock", "~> 3.8"
 
   s.files = Dir[