Gemfile in mastercoin-wallet-0.0.1 vs Gemfile in mastercoin-wallet-0.0.2

@@ -2,9 +2,10 @@
 gem 'qtbindings'
 gem 'httparty'
 gem 'active_support'
 gem 'bitcoin-ruby', '~> 0.0.1', git: "https://github.com/maran/bitcoin-ruby.git"
 gem 'mastercoin-ruby'
+gem 'ffi'
 
 group :development do
   gem "bundler", "~> 1.0"
   gem "jeweler", "~> 1.8.7"
 end