diff --git a/Gemfile b/Gemfile
index 670e035d..66467d58 100644
--- a/Gemfile
+++ b/Gemfile
@@ -60,3 +60,4 @@ end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+gem 'nokogiri', '~> 1.6', '>= 1.6.8'