diff --git a/Gemfile b/Gemfile
index f16ce2a2a3a0e4c5f709648a2957487a7dd5c6b4..962ce28f90d597bce75122c22bf2bc28cecaab84 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,8 @@
-source :rubygems
+source 'https://rubygems.org'
 
 gem "hash_validator"
 gem "hashdiff"
 gem "diffy"
 gem "mediawiki_api"
 gem "net-ssh"
+gem "ruby-ip"