rufus-scheduler.gemspec in rufus-scheduler-3.0.7 vs rufus-scheduler.gemspec in rufus-scheduler-3.0.8

@@ -28,9 +28,10 @@
 
   s.add_runtime_dependency 'tzinfo'
 
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec', '>= 2.13.0'
+  s.add_development_dependency 'chronic'
 
   s.require_path = 'lib'
 
   s.post_install_message =
     %{