diff --git a/librarix.gemspec b/librarix.gemspec
index 1d30f04..7db3c66 100644
--- a/librarix.gemspec
+++ b/librarix.gemspec
@@ -26,4 +26,5 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency "bundler", "~> 1.7"
   spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "sass", "~> 3.4"
 end