diff --git a/Gemfile b/Gemfile
index 28776298..e8df59b9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,7 @@ source :rubygems
 gem 'rubyzip', '>= 1.0.0'
 gem 'zip-zip' # Just to avoid 'cannot load such file -- zip/zip' error
 gem 'simple_enum'
+gem 'nokogiri', '>= 1.5.10'
 gem 'uuidtools', '~> 2.1.1'
 
 #Allows --without=xapian