diff --git a/value_objects.gemspec b/value_objects.gemspec
index 22319b6..7f8b2c5 100644
--- a/value_objects.gemspec
+++ b/value_objects.gemspec
@@ -17,9 +17,9 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = '>= 2.2'
 
-  s.add_dependency 'activerecord', '~> 4.2'
+  s.add_dependency 'activerecord', '>= 4.2', '< 5.2'
 
-  s.add_development_dependency 'actionview', '~> 4.2'
+  s.add_development_dependency 'actionview', '>= 4.2', '< 5.2'
   s.add_development_dependency 'bundler', '~> 1.11'
   s.add_development_dependency 'rake', '~> 10.0'
   s.add_development_dependency 'rspec', '~> 3.0'