diff --git a/Yesod/Json.hs b/Yesod/Json.hs
--- a/Yesod/Json.hs
+++ b/Yesod/Json.hs
@@ -18,14 +18,15 @@
     )
 import Yesod.Core (defaultLayout, Yesod)
 import Yesod.Widget (GWidget)
-import qualified Data.JSON.Types as J
-import qualified Text.JSON.Enumerator as J
-import Data.Text.Lazy (pack)
+import qualified Data.Aeson as J
+import Data.Aeson.Encode (fromValue)
+import Data.Text (pack)
 import Control.Arrow (first)
 import Data.Map (fromList)
+import qualified Data.Vector as V
 
 instance ToContent J.Value where
-    toContent = flip ContentBuilder Nothing . J.renderValue
+    toContent = flip ContentBuilder Nothing . fromValue
 
 -- | Provide both an HTML and JSON representation for a piece of data, using
 -- the default layout for the HTML output ('defaultLayout').
@@ -44,10 +45,15 @@
 type Json = J.Value
 
 jsonScalar :: String -> Json
-jsonScalar = J.ValueAtom . J.AtomText . pack
+jsonScalar = J.String . pack
 
 jsonList :: [Json] -> Json
-jsonList = J.ValueArray
+jsonList = J.Array . V.fromList
 
 jsonMap :: [(String, Json)] -> Json
-jsonMap = J.ValueObject . fromList . map (first pack)
+jsonMap = J.Object . fromList . map (first pack)
+
+{- FIXME
+instance ToJavascript J.Value where
+    toJavascript = fromLazyText . decodeUtf8 . toLazyByteString . JE.renderValue
+-}
diff --git a/yesod-json.cabal b/yesod-json.cabal
--- a/yesod-json.cabal
+++ b/yesod-json.cabal
@@ -1,5 +1,5 @@
 name:            yesod-json
-version:         0.0.0.1
+version:         0.1.0
 license:         BSD3
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -13,11 +13,11 @@
 
 library
     build-depends:   base                      >= 4        && < 5
-                   , yesod-core                >= 0.7      && < 0.8
-                   , json-enumerator           >= 0.0      && < 0.1
-                   , json-types                >= 0.1      && < 0.2
-                   , containers                >= 0.2      && < 0.5
+                   , yesod-core                >= 0.8      && < 0.9
+                   , aeson                     >= 0.3.1.1  && < 0.4
                    , text                      >= 0.8      && < 0.12
+                   , vector
+                   , containers
     exposed-modules: Yesod.Json
     ghc-options:     -Wall