otp.gemspec in otp-0.0.6 vs otp.gemspec in otp-0.0.7

- old
+ new

@@ -11,9 +11,11 @@
   spec.summary       = %q{One-Time Password Library}
   spec.description   = %q{An implementation of HOTP (RFC4226) and TOTP (RFC6238).}
   spec.homepage      = "https://github.com/gotoyuzo/otp"
   spec.license       = "MIT"
 
+  spec.required_ruby_version = '>= 2.0'
+
   spec.files         = `git ls-files -z`.split("\x0")
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 