diff --git a/paranoia.gemspec b/paranoia.gemspec
index 62ce3d50..fe88af52 100644
--- a/paranoia.gemspec
+++ b/paranoia.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = '>= 2.0'
 
-  s.add_dependency 'activerecord', '>= 4.0', '< 5.1'
+  s.add_dependency 'activerecord', '>= 4.0', '< 5.2'
 
   s.add_development_dependency "bundler", ">= 1.0.0"
   s.add_development_dependency "rake"