diff --git a/instapaper.gemspec b/instapaper.gemspec
index 01cebd6..0a96597 100644
--- a/instapaper.gemspec
+++ b/instapaper.gemspec
@@ -7,6 +7,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'multi_json', '~> 1'
   spec.add_dependency 'rash'
   spec.add_dependency 'simple_oauth'
+  spec.add_dependency 'values'
   spec.add_development_dependency 'bundler', '~> 1.0'
   spec.author        = 'Steve Agalloco'
   spec.description   = "Ruby Client for Instapaper's Full API"