diff --git a/saml.gemspec b/saml.gemspec
index 24cbc87..444f144 100644
--- a/saml.gemspec
+++ b/saml.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.add_dependency "activesupport", ">= 4.2"
   s.add_dependency "activemodel", ">= 4.2"
   s.add_dependency "xmlmapper", '~> 0.7.3'
-  s.add_dependency 'nokogiri', '~> 1.8', '>= 1.8.2', '<= 1.8.5'
+  s.add_dependency 'nokogiri', '~> 1.8'
   s.add_dependency "xmldsig", '>= 0.5.1', '< 0.8.0'
   s.add_dependency "xmlenc", '>= 0.6.9', '< 0.8.0'