diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 2.0.1
+* document Data.Param.File
+* expose Control.Monad.Apiary.Action.getReqBodyJSON
+
 # 2.0.0
 * add methods to get application from Apiary monad stack.
 * add Control.Monad.Apiary.Action.application to mount a wai application at certain route.
diff --git a/apiary.cabal b/apiary.cabal
--- a/apiary.cabal
+++ b/apiary.cabal
@@ -1,5 +1,5 @@
 name:                apiary
-version:             2.0.0
+version:             2.0.1
 synopsis:            Simple and type safe web framework that generate web API documentation.
 description:
   Simple and type safe web framework that can be automatically generate API documentation.
diff --git a/src/Control/Monad/Apiary/Action.hs b/src/Control/Monad/Apiary/Action.hs
--- a/src/Control/Monad/Apiary/Action.hs
+++ b/src/Control/Monad/Apiary/Action.hs
@@ -50,6 +50,7 @@
     , ActionReqBody(..), getReqBody
     , getReqBodyParams
     , getReqBodyFiles
+    , getReqBodyJSON
     -- ** setter
     , devFile
     , devFile'
diff --git a/src/Data/Apiary/Param.hs b/src/Data/Apiary/Param.hs
--- a/src/Data/Apiary/Param.hs
+++ b/src/Data/Apiary/Param.hs
@@ -102,6 +102,9 @@
           fileParameter   :: S.ByteString
         , fileName        :: S.ByteString
         , fileContentType :: S.ByteString
+        -- | check out 'Control.Monad.Apiary.uploadFilePath'. since 2.0.0
+        --
+        -- a Left value store file in memmory, a Right value contain 'FilePath' of uploaded file.
         , fileContent     :: Either L.ByteString FilePath
         }
     deriving (Show, Eq, Typeable)