diff --git a/riif.gemspec b/riif.gemspec
index 5321a59..79e990c 100644
--- a/riif.gemspec
+++ b/riif.gemspec
@@ -27,4 +27,5 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'combustion', '~> 1.1'
   gem.add_development_dependency 'fuubar'
   gem.add_development_dependency 'coveralls'
+  gem.add_dependency 'csv'
 end