Rakefile in cross-stub-0.2.2 vs Rakefile in cross-stub-0.2.3

@@ -13,10 +13,10 @@
     gem.authors = ["NgTzeYang"]
     gem.add_development_dependency "bacon", ">= 0.0.0"
     gem.add_development_dependency "otaku", ">= 0.4.0"
     gem.add_dependency "ruby2ruby", ">= 1.2.5"
     gem.add_dependency "sexp_processor", ">= 3.0.5"
-    gem.add_dependency "sourcify", ">= 0.2.3"
+    gem.add_dependency "sourcify", ">= 0.4.0"
     gem.required_ruby_version = '>= 1.8.6'
     # TODO: How do we declare the following optional dependencies ??
     # 1. gem.add_dependency "memcache-client", "= 1.8.5"
     # 2. gem.add_dependency "redis", "= 2.0.3"
   end