killbill-paypal-express.gemspec in killbill-paypal-express-1.6.3 vs killbill-paypal-express.gemspec in killbill-paypal-express-1.6.4

@@ -20,10 +20,10 @@
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
   s.rdoc_options << '--exclude' << '.'
 
-  s.add_dependency 'killbill', '~> 1.8.3'
+  s.add_dependency 'killbill', '~> 1.9.0'
   s.add_dependency 'activemerchant', '~> 1.36.0'
   s.add_dependency 'activerecord', '~> 3.2.1'
   s.add_dependency 'sinatra', '~> 1.3.4'
   if defined?(JRUBY_VERSION)
     s.add_dependency 'activerecord-jdbcmysql-adapter', '~> 1.2.9'