diff --git a/activity_notification.gemspec b/activity_notification.gemspec
index dab6aa4..6f84629 100644
--- a/activity_notification.gemspec
+++ b/activity_notification.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
   s.required_ruby_version = '>= 2.1.0'
 
-  s.add_dependency 'railties', '>= 5.0.0', '< 7.3'
+  s.add_dependency 'railties', '>= 5.0.0', '< 8.1'
   s.add_dependency 'i18n', '>= 0.5.0'
   s.add_dependency 'jquery-rails', '>= 3.1.1'
   s.add_dependency 'swagger-blocks', '>= 3.0.0'