diff --git a/Gemfile b/Gemfile
index f960e78..553f8aa 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,4 +2,5 @@ source 'https://rubygems.org'
 
 gemspec
 
+gem 'perfectqueue', github: 'treasure-data/perfectqueue', ref: '7dc0bb7'
 gem 'coveralls', require: false