diff --git a/sonos.gemspec b/sonos.gemspec
index 30ace34..b97c903 100644
--- a/sonos.gemspec
+++ b/sonos.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version = '>= 1.9.2'
   gem.add_dependency 'savon', '~> 2.0'
-  gem.add_dependency 'nokogiri'
+  gem.add_dependency 'nokogiri', '~> 1.6.8'
   gem.add_dependency 'thor'
   gem.add_dependency 'httpclient'
   gem.add_dependency 'ssdp'