diff --git a/gemfiles/Gemfile-rails-4-1 b/gemfiles/Gemfile-rails-4-1
index 44a1c98a..7bbabf9d 100644
--- a/gemfiles/Gemfile-rails-4-1
+++ b/gemfiles/Gemfile-rails-4-1
@@ -2,6 +2,11 @@
 
 source "https://rubygems.org"
 
+git_source(:github) do |repo_name|
+  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?('/')
+  "https://github.com/#{repo_name}.git"
+end
+
 gemspec path: ".."
 
 gem "rails", github: "rails/rails", branch: "4-1-stable"
diff --git a/gemfiles/Gemfile-rails-4-2 b/gemfiles/Gemfile-rails-4-2
index bb35c5f2..6e106b5e 100644
--- a/gemfiles/Gemfile-rails-4-2
+++ b/gemfiles/Gemfile-rails-4-2
@@ -2,6 +2,11 @@
 
 source "https://rubygems.org"
 
+git_source(:github) do |repo_name|
+  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?('/')
+  "https://github.com/#{repo_name}.git"
+end
+
 gemspec path: ".."
 
 gem "rails", github: "rails/rails", branch: "4-2-stable"