hazard.gemspec in hazard-1.1.0 vs hazard.gemspec in hazard-1.2.0

@@ -26,6 +26,8 @@
 
   spec.add_development_dependency 'bundler', '~> 1.13'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'minitest', '~> 5.0'
 
+  spec.required_ruby_version = '>= 1.9'
+
 end