diff --git a/Gemfile b/Gemfile
index d07ee15..506fbd6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,3 @@
+source 'https://rubygems.org'
 gem 'gitlab', '~> 3.3.0'
 gem 'jenkins_api_client', '~> 0.14.1'
--
libgit2 0.21.2