nanoc.gemspec in nanoc-4.0.0a1 vs nanoc.gemspec in nanoc-4.0.0a2

@@ -23,10 +23,10 @@
   s.require_paths      = ['lib']
 
   s.rdoc_options     = ['--main', 'README.md']
   s.extra_rdoc_files = ['ChangeLog', 'LICENSE', 'README.md', 'NEWS.md']
 
-  s.required_ruby_version = '>= 1.9.3'
+  s.required_ruby_version = '>= 2.0.0'
 
   s.add_runtime_dependency('cri', '~> 2.3')
 
   s.add_development_dependency('bundler', '>= 1.7.10', '< 2.0')
 end