diff --git a/vagrant-libvirt.gemspec b/vagrant-libvirt.gemspec
index ce88056..7695951 100644
--- a/vagrant-libvirt.gemspec
+++ b/vagrant-libvirt.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |gem|
 
   gem.add_runtime_dependency 'fog', '1.15'
   gem.add_runtime_dependency 'ruby-libvirt', '0.4.0'
-  gem.add_runtime_dependency 'nokogiri', '1.6'
+  gem.add_runtime_dependency 'nokogiri', '~> 1.6.0'
 
   gem.add_development_dependency 'rake', '10.1.0'
 end