diff --git a/rubocop-govuk.gemspec b/rubocop-govuk.gemspec
index 6518b85..4490508 100644
--- a/rubocop-govuk.gemspec
+++ b/rubocop-govuk.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rake", "~> 13"
 
   spec.add_dependency "rubocop", "1.68.0"
-  spec.add_dependency "rubocop-ast", "1.33.1"
+  spec.add_dependency "rubocop-ast", "1.34.0"
   spec.add_dependency "rubocop-capybara", "2.21.0"
   spec.add_dependency "rubocop-rails", "2.27.0"
   spec.add_dependency "rubocop-rake", "0.6.0"