diff --git a/jquery-fileupload-rails.gemspec b/jquery-fileupload-rails.gemspec
index a8400c3..cb88ca0 100644
--- a/jquery-fileupload-rails.gemspec
+++ b/jquery-fileupload-rails.gemspec
@@ -21,4 +21,5 @@ Gem::Specification.new do |s|
   s.add_dependency             'railties',   '>= 3.1'
   s.add_dependency             'actionpack', '>= 3.1'
   s.add_development_dependency 'rails', '>= 3.1'
+  s.add_runtime_dependency     'sass', '>= 3.2'
 end