Gemfile in spf-0.0.41 vs Gemfile in spf-0.0.42

@@ -8,6 +8,7 @@
 group :development do
   gem "rspec", "~> 2.8.0"
   gem "rdoc", "~> 3.12"
   gem "bundler", "~> 1.0"
   gem "jeweler", "~> 1.8.7"
+  gem "ruby-ip", "~> 0.9.1"
 end