Rakefile in rest-graph-0.8.0 vs Rakefile in rest-graph-0.8.1

@@ -15,9 +15,10 @@
 
   version RestGraph::VERSION
 
   depend_on 'rest-client'
   depend_on 'json',    :development => true
+  depend_on 'rack',    :development => true
 
   depend_on 'rr',      :development => true
   depend_on 'webmock', :development => true
   depend_on 'bacon',   :development => true