Gemfile in spf-0.0.42 vs Gemfile in spf-0.0.43

@@ -1,9 +1,11 @@
 source "http://rubygems.org"
 # Add dependencies required to use your gem here.
 # Example:
 #   gem "activesupport", ">= 2.3.5"
 
+gem "ruby-ip", "~> 0.9.1"
+
 # Add dependencies to develop your gem here.
 # Include everything needed to run rake, tests, features, etc.
 group :development do
   gem "rspec", "~> 2.8.0"
   gem "rdoc", "~> 3.12"