diff --git a/Gemfile b/Gemfile
index dadf7ff..1550ccd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-source 'https://rubygems.org'
+source 'https://gem.coop'
 
 gem 'rake'
 gem 'roda'