diff --git a/activerecord_null_object.gemspec b/activerecord_null_object.gemspec
index 835c78a..59c9f51 100644
--- a/activerecord_null_object.gemspec
+++ b/activerecord_null_object.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_runtime_dependency "activesupport", ">= 6.0", "< 8"
-  spec.add_runtime_dependency "activerecord", ">= 6.0", "< 8"
+  spec.add_runtime_dependency "activerecord", ">= 6.0", "< 9"
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec"