arkenstone.gemspec in arkenstone-0.5.2 vs arkenstone.gemspec in arkenstone-0.6.0

@@ -2,9 +2,11 @@
 lib = File.expand_path("../lib", __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require "arkenstone/version"
 
 Gem::Specification.new do |spec|
+  spec.required_ruby_version = ">= #{Arkenstone::RUBY_VERSION}"
+
   spec.name          = "arkenstone"
   spec.version       = Arkenstone::VERSION
   spec.license       = "MIT"
   spec.author        = "Nicholas Scheurich"
   spec.email         = "[e-mail]"