Rakefile in distil-0.13.0 vs Rakefile in distil-0.13.1

@@ -13,9 +13,10 @@
     gemspec.files.reject! { |f| File.directory?(f) }
     gemspec.executables= ['distil']
     gemspec.extensions= ['vendor/extconf.rb']
     gemspec.add_dependency('json', '>= 1.4.3')
     gemspec.add_dependency('rubyzip', '>=0.9.4')
+    gemspec.add_dependency('treetop', '>=1.4.8')
   end
 
   Jeweler::GemcutterTasks.new
 
   task :push => "gemcutter:release"