diff --git a/lib/queue_classic_admin/version.rb b/lib/queue_classic_admin/version.rb
index dfa027d..83116e6 100644
--- a/lib/queue_classic_admin/version.rb
+++ b/lib/queue_classic_admin/version.rb
@@ -1,3 +1,3 @@
 module QueueClassicAdmin
-  VERSION = "4.0.0.alpha4"
+  VERSION = "4.0.0.alpha6"
 end
diff --git a/queue_classic_admin.gemspec b/queue_classic_admin.gemspec
index d051913..5b47b85 100644
--- a/queue_classic_admin.gemspec
+++ b/queue_classic_admin.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib,vendor}/**/*"] + ["MIT-LICENSE", "Rakefile", "README.md"]
   s.test_files = Dir["test/**/*"]
 
-  s.add_runtime_dependency "rails", ">= 5.0.0", "< 7.1"
+  s.add_runtime_dependency "rails", ">= 5.0.0", "< 8.1"
   s.add_runtime_dependency "queue_classic", "4.0.0.pre.alpha1"
   s.add_runtime_dependency "pg"
   s.add_runtime_dependency "will_paginate", ">= 3.0.0"