diff --git a/dyndnsd.gemspec b/dyndnsd.gemspec
index 364a01f..3cbdfa7 100644
--- a/dyndnsd.gemspec
+++ b/dyndnsd.gemspec
@@ -46,6 +46,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'rubocop', '~> 1.82.0'
   s.add_development_dependency 'rubocop-rake', '~> 0.7.1'
-  s.add_development_dependency 'rubocop-rspec', '~> 3.8.0'
+  s.add_development_dependency 'rubocop-rspec', '~> 3.9.0'
   s.add_development_dependency 'solargraph', '~> 0.55.0'
 end