diff --git a/activeinteractor.gemspec b/activeinteractor.gemspec
index 9aede15..767645b 100644
--- a/activeinteractor.gemspec
+++ b/activeinteractor.gemspec
@@ -34,7 +34,7 @@ Gem::Specification.new do |spec|
   }
 
   spec.add_dependency 'activemodel', '>= 4.2', '< 8'
-  spec.add_dependency 'activesupport', '>= 4.2', '< 8'
+  spec.add_dependency 'activesupport', '>= 4.2', '< 9'
 
   spec.add_development_dependency 'bundler', '~> 2.3'
 end