diff --git a/Gemfile b/Gemfile
index 7d1049b..1181f91 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,6 +22,7 @@ group :test do
 end
 
 gem 'prometheus-client', '~> 1.0'
-# gem 'prometheus_gcstat', git: 'git@github.com:gocardless/prometheus_gcstat_ruby'
-
+source "https://rubygems.pkg.github.com/gocardless" do
+  gem "prometheus_gcstat", "0.1.1"
+end
 gemspec