Rakefile in sinatra-cometio-0.0.2 vs Rakefile in sinatra-cometio-0.0.3

@@ -13,10 +13,10 @@
 $hoe = Hoe.spec 'sinatra-cometio' do
   self.developer 'Sho Hashimoto', '[e-mail]'
   self.rubyforge_name       = self.name # TODO this is default value
   self.extra_deps         = [['sinatra','>= 1.3.3'],
                              ['eventmachine', '>= 1.0.0'],
-                             ['json'],
+                             ['json', '>= 1.7.0'],
                              ['sinatra-contrib', '>= 1.3.2'],
                              ['event_emitter', '>= 0.1.0']]
 
 end