diff --git a/Yesod.hs b/Yesod.hs
index 948e1b01..25b55099 100644
--- a/Yesod.hs
+++ b/Yesod.hs
@@ -13,7 +13,7 @@ module Yesod
     , Application
     , lift
     , liftIO
-    , MonadInvertIO
+    , MonadPeelIO
     , mempty
     , showIntegral
     , readIntegral
@@ -41,7 +41,7 @@ import Yesod.Hamlet
 import Control.Monad.Trans.Class (lift)
 import Control.Monad.IO.Class (liftIO)
 import Data.Monoid (mempty)
-import Control.Monad.Invert (MonadInvertIO)
+import Control.Monad.IO.Peel (MonadPeelIO)
 
 showIntegral :: Integral a => a -> String
 showIntegral x = show (fromIntegral x :: Integer)
diff --git a/Yesod/Handler.hs b/Yesod/Handler.hs
index 608ac2aa..be1740d5 100644
--- a/Yesod/Handler.hs
+++ b/Yesod/Handler.hs
@@ -112,8 +112,7 @@ import Control.Failure (Failure (failure))
 
 import Text.Hamlet
 
-import Control.Monad.Invert (MonadInvertIO (..))
-import Control.Monad (liftM)
+import Control.Monad.IO.Peel (MonadPeelIO)
 import qualified Data.Map as Map
 import qualified Data.ByteString.Char8 as S8
 
@@ -210,7 +209,7 @@ newtype GHandler sub master a =
     GHandler
         { unGHandler :: GHInner sub master a
         }
-    deriving (Functor, Applicative, Monad, MonadIO)
+    deriving (Functor, Applicative, Monad, MonadIO, MonadPeelIO)
 
 type GHInner s m =
     ReaderT (HandlerData s m) (
@@ -222,15 +221,6 @@ type GHInner s m =
 
 type SessionMap = Map.Map String String
 
-instance MonadInvertIO (GHandler s m) where
-    newtype InvertedIO (GHandler s m) a =
-        InvGHandlerIO
-            { runInvGHandlerIO :: InvertedIO (GHInner s m) a
-            }
-    type InvertedArg (GHandler s m) = (HandlerData s m, (SessionMap, ()))
-    invertIO = liftM (fmap InvGHandlerIO) . invertIO . unGHandler
-    revertIO f = GHandler $ revertIO $ liftM runInvGHandlerIO . f
-
 type Endo a = a -> a
 
 -- | An extension of the basic WAI 'W.Application' datatype to provide extra
diff --git a/Yesod/Widget.hs b/Yesod/Widget.hs
index efff5338..7be74bb9 100644
--- a/Yesod/Widget.hs
+++ b/Yesod/Widget.hs
@@ -46,7 +46,7 @@ import Control.Monad.IO.Class (MonadIO)
 import Control.Monad.Trans.Class (lift)
 import Yesod.Internal
 
-import Control.Monad.Invert (MonadInvertIO (..))
+import Control.Monad.IO.Peel (MonadPeelIO)
 import Control.Monad (liftM)
 import qualified Data.Map as Map
 
@@ -54,7 +54,7 @@ import qualified Data.Map as Map
 -- site datatypes. This is basically a large 'WriterT' stack keeping track of
 -- dependencies along with a 'StateT' to track unique identifiers.
 newtype GWidget s m a = GWidget { unGWidget :: GWInner s m a }
-    deriving (Functor, Applicative, Monad, MonadIO)
+    deriving (Functor, Applicative, Monad, MonadIO, MonadPeelIO)
 type GWInner sub master =
     WriterT (Body (Route master)) (
     WriterT (Last Title) (
@@ -69,15 +69,6 @@ type GWInner sub master =
 instance Monoid (GWidget sub master ()) where
     mempty = return ()
     mappend x y = x >> y
-instance MonadInvertIO (GWidget s m) where
-    newtype InvertedIO (GWidget s m) a =
-        InvGWidgetIO
-            { runInvGWidgetIO :: InvertedIO (GWInner s m) a
-            }
-    type InvertedArg (GWidget s m) =
-        (Int, (HandlerData s m, (Map.Map String String, ())))
-    invertIO = liftM (fmap InvGWidgetIO) . invertIO . unGWidget
-    revertIO f = GWidget $ revertIO $ liftM runInvGWidgetIO . f
 
 instance HamletValue (GWidget s m ()) where
     newtype HamletMonad (GWidget s m ()) a =
diff --git a/yesod.cabal b/yesod.cabal
index c28800ed..ff1d5f72 100644
--- a/yesod.cabal
+++ b/yesod.cabal
@@ -1,5 +1,5 @@
 name:            yesod
-version:         0.6.8
+version:         0.7.0
 license:         BSD3
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -36,7 +36,7 @@ library
                    , text                      >= 0.5      && < 0.12
                    , template-haskell          >= 2.4      && < 2.6
                    , web-routes-quasi          >= 0.6.2    && < 0.7
-                   , hamlet                    >= 0.5.1    && < 0.7
+                   , hamlet                    >= 0.6      && < 0.7
                    , blaze-builder             >= 0.2.1    && < 0.3
                    , transformers              >= 0.2      && < 0.3
                    , clientsession             >= 0.4.0    && < 0.5
@@ -45,8 +45,8 @@ library
                    , cereal                    >= 0.2      && < 0.4
                    , base64-bytestring         >= 0.1      && < 0.2
                    , old-locale                >= 1.0.0.2  && < 1.1
-                   , persistent                >= 0.3.0    && < 0.4
-                   , neither                   >= 0.1.0    && < 0.2
+                   , persistent                >= 0.4      && < 0.5
+                   , neither                   >= 0.2      && < 0.3
                    , network                   >= 2.2.1.5  && < 2.4
                    , email-validate            >= 0.2.5    && < 0.3
                    , web-routes                >= 0.23     && < 0.24
@@ -54,6 +54,7 @@ library
                    , data-default              >= 0.2      && < 0.3
                    , failure                   >= 0.1      && < 0.2
                    , containers                >= 0.2      && < 0.5
+                   , monad-peel                >= 0.1      && < 0.2
     exposed-modules: Yesod
                      Yesod.Content
                      Yesod.Dispatch