packetgen.gemspec in packetgen-0.1.0 vs packetgen.gemspec in packetgen-0.2.0

@@ -18,9 +18,11 @@
   end
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
+  spec.required_ruby_version = '>= 2.1.0'
+
   spec.add_dependency 'pcaprub', '~>0.12.4'
 
   spec.add_development_dependency 'bundler', '~> 1.7'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec', '~> 3.0'