diff --git a/active_record_openid_store.gemspec b/active_record_openid_store.gemspec
index aa04d8f..e0c7546 100644
--- a/active_record_openid_store.gemspec
+++ b/active_record_openid_store.gemspec
@@ -13,7 +13,7 @@ Gem::Specification.new do |s|
 
   s.rubyforge_project = "active_record_openid_store"
 
-  s.add_dependency 'ruby-openid', '~> 2.1.0'
+  s.add_dependency 'ruby-openid', '> 2.1.0'
   s.add_dependency 'activerecord', '> 3.0.0'
 
   s.add_development_dependency  'rake'