diff --git a/hack2.cabal b/hack2.cabal
--- a/hack2.cabal
+++ b/hack2.cabal
@@ -1,5 +1,5 @@
 Name:                 hack2
-Version:              2012.1.19
+Version:              2014.11.17
 Build-type:           Simple
 Synopsis:             a Haskell Webserver Interface (V2)
 Description:
@@ -14,7 +14,7 @@
 Cabal-version:        >= 1.2
 category:             Web
 homepage:             https://github.com/nfjinjing/hack2
-data-files:           readme.md, changelog.md
+extra-doc-files:      readme.md, changelog.md
 
 library
   ghc-options: -Wall
diff --git a/readme.md b/readme.md
--- a/readme.md
+++ b/readme.md
@@ -3,11 +3,6 @@
 
 Hack2 is a port of Ruby's [Rack](http://rack.rubyforge.org/) webserver interface.
 
-Version
--------
-
-> 2011.6.19
-
 Introduction
 ------------
 
@@ -30,13 +25,12 @@
     import Hack2
     import Hack2.Contrib.Response (set_body_bytestring)
     import Hack2.Handler.SnapServer
-    import Data.Default (def)
 
     app :: Application
     app = \env -> 
       return $ 
-        set_body_bytestring "Hello World" $
-          Response 200 [ ("Content-Type", "text/plain") ] def
+        Response 
+          200 [ ("Content-Type", "text/plain") ] "Hello World"
 
     main = run app
     
@@ -131,7 +125,7 @@
     import Hack2.Handler.SnapServer
     import Data.Default (def)
 
-    import Data.ByteString.Lazy.Char8 (pack)
+    import Data.ByteString.Char8 (pack)
     import Hack2.Contrib.Utils (empty_app)
     import Hack2.Contrib.Middleware.URLMap