diff --git a/network-api-support.cabal b/network-api-support.cabal
--- a/network-api-support.cabal
+++ b/network-api-support.cabal
@@ -1,5 +1,5 @@
 Name:               network-api-support
-Version:            0.1.0
+Version:            0.2.0
 License:            BSD3
 License-File:       LICENSE
 Author:             Mark Hibberd <mark@hibberd.id.au>
@@ -7,8 +7,8 @@
 Copyright:          (c) 2012 Mark Hibberd
 Synopsis:           Toolkit for building http client libraries over Network.Http.Conduit
 Category:           Network APIs
-Homepage:           https://github.com/apiengine/network-api-support
-Bug-reports:        https://github.com/apiengine/network-api-support/issues
+Homepage:           https://github.com/markhibberd/network-api-support
+Bug-reports:        https://github.com/markhibberd/network-api-support/issues
 Cabal-Version:      >= 1.8
 Build-Type:         Simple
 Description:
@@ -20,7 +20,7 @@
 
 Source-Repository   head
   Type:             git
-  Location:         https://github.com/apiengine/network-api-support.git
+  Location:         https://github.com/markhibberd/network-api-support.git
 
 Flag                small_base
   Description:      Choose the new, split-up base package.
@@ -28,16 +28,16 @@
 Library
   Build-Depends:
                     base                            >= 3          && < 5
-                    , aeson                         >= 0.5
-                    , attoparsec                    >= 0.10
-                    , bytestring                    >= 0.9
-                    , case-insensitive              >= 0.4
-                    , http-types                    >= 0.6
-                    , http-client                   >= 0.2.2.2
-                    , http-client-tls               >= 0.2.1.1
-                    , text                          >= 0.11
-                    , time                          >= 1
-                    , tls                           >= 1.2.2
+                    , aeson                         >= 0.5        && < 0.9
+                    , attoparsec                    >= 0.10       && < 0.13
+                    , bytestring                    >= 0.9.1.5    && < 0.11
+                    , case-insensitive              >= 0.2        && < 1.3
+                    , http-types                    >= 0.6        && < 0.9
+                    , http-client                   >= 0.2.2.2    && < 0.5
+                    , http-client-tls               >= 0.2.1.1    && < 0.3
+                    , text                          >= 0.11       && < 1.3
+                    , time                          == 1.*
+                    , tls                           == 1.2.*
 
   GHC-Options:
                     -Wall -fno-warn-orphans
diff --git a/src/Network/Api/Support/Request.hs b/src/Network/Api/Support/Request.hs
--- a/src/Network/Api/Support/Request.hs
+++ b/src/Network/Api/Support/Request.hs
@@ -2,7 +2,8 @@
 module Network.Api.Support.Request (
   RequestTransformer
 , setApiKey
-, setParams
+, setUrlEncodedBody
+, setQueryParams
 , setHeaders
 , setHeader
 , addHeader
@@ -35,9 +36,13 @@
 setApiKey :: B.ByteString -> RequestTransformer
 setApiKey key = Endo $ applyBasicAuth key ""
 
+-- | Set URL encoded form params on the request body.
+setUrlEncodedBody :: [(B.ByteString, B.ByteString)] -> RequestTransformer
+setUrlEncodedBody = Endo . urlEncodedBody
+
 -- | Set request query parameters.
-setParams :: [(B.ByteString, B.ByteString)] -> RequestTransformer
-setParams params = Endo $ urlEncodedBody params
+setQueryParams :: [(B.ByteString, Maybe B.ByteString)] -> RequestTransformer
+setQueryParams = Endo . setQueryString
 
 -- | Set request headers.
 setHeaders :: [(CI B.ByteString, B.ByteString)] -> RequestTransformer
diff --git a/src/Network/Api/Support/Response.hs b/src/Network/Api/Support/Response.hs
--- a/src/Network/Api/Support/Response.hs
+++ b/src/Network/Api/Support/Response.hs
@@ -6,6 +6,7 @@
 , basicResponder
 ) where
 
+import Control.Applicative
 import qualified Data.ByteString as B
 import qualified Data.ByteString.Lazy as BL
 import Data.Attoparsec.Lazy
@@ -27,6 +28,13 @@
   fmap _ (ParseError t) = ParseError t
   fmap _ (DecodeError t) = DecodeError t
   fmap f (JsonSuccess a) = JsonSuccess $ f a
+
+instance Applicative JsonResult where 
+   pure = JsonSuccess
+
+   (JsonSuccess f)   <*> m = fmap f m
+   (ParseError err)  <*> _ = ParseError err
+   (DecodeError err) <*> _ = DecodeError err
 
 instance Monad JsonResult where
   return = JsonSuccess