diff --git a/evolution.gemspec b/evolution.gemspec
index 1aa502c..d1d6733 100644
--- a/evolution.gemspec
+++ b/evolution.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.rdoc"]
   s.test_files = Dir["test/**/*"]
 
-  s.add_dependency "rails", ">= 4.0", "< 7.1"
+  s.add_dependency "rails", ">= 4.0", "< 9"
   s.add_runtime_dependency "acts_as_dag", ">= 2"
 
   s.add_development_dependency "sqlite3"