Gemfile in skein-0.3.7 vs Gemfile in skein-0.8.1

@@ -1,9 +1,12 @@
 source 'https://rubygems.org'
 
-gem 'birling'
+gem 'birling', '>= 0.2.0'
 
 group :development, :test do
+  gem 'bunny', platforms: :ruby
+  gem 'march_hare', platforms: :jruby
+
   gem 'rake'
   gem 'jeweler'
   gem 'test-unit'
 end