diff --git a/yesod-core/Yesod/Content.hs b/yesod-core/Yesod/Content.hs
index 9b98883f..b8ff28e0 100644
--- a/yesod-core/Yesod/Content.hs
+++ b/yesod-core/Yesod/Content.hs
@@ -60,11 +60,7 @@ import Blaze.ByteString.Builder (Builder, fromByteString, fromLazyByteString)
 import Data.Monoid (mempty)
 
 import Text.Hamlet (Html)
-#if MIN_VERSION_blaze_html(0, 5, 0)
 import Text.Blaze.Html.Renderer.Utf8 (renderHtmlBuilder)
-#else
-import Text.Blaze.Renderer.Utf8 (renderHtmlBuilder)
-#endif
 import Data.String (IsString (fromString))
 import Network.Wai (FilePart)
 import Data.Conduit (Source, ResourceT, Flush)
diff --git a/yesod-core/Yesod/Core.hs b/yesod-core/Yesod/Core.hs
index cc7a7719..8beedc72 100644
--- a/yesod-core/Yesod/Core.hs
+++ b/yesod-core/Yesod/Core.hs
@@ -20,8 +20,6 @@ module Yesod.Core
     , unauthorizedI
       -- * Logging
     , LogLevel (..)
-    , formatLogMessage
-    , fileLocationToString
     , logDebug
     , logInfo
     , logWarn
@@ -59,38 +57,7 @@ import Yesod.Request
 import Yesod.Widget
 import Yesod.Message
 
-import Language.Haskell.TH.Syntax
-import qualified Language.Haskell.TH.Syntax as TH
-import Data.Text (Text)
-
-logTH :: LogLevel -> Q Exp
-logTH level =
-    [|messageLoggerHandler $(qLocation >>= liftLoc) $(TH.lift level)|]
-  where
-    liftLoc :: Loc -> Q Exp
-    liftLoc (Loc a b c d e) = [|Loc $(TH.lift a) $(TH.lift b) $(TH.lift c) $(TH.lift d) $(TH.lift e)|]
-
--- | Generates a function that takes a 'Text' and logs a 'LevelDebug' message. Usage:
---
--- > $(logDebug) "This is a debug log message"
-logDebug :: Q Exp
-logDebug = logTH LevelDebug
-
--- | See 'logDebug'
-logInfo :: Q Exp
-logInfo = logTH LevelInfo
--- | See 'logDebug'
-logWarn :: Q Exp
-logWarn = logTH LevelWarn
--- | See 'logDebug'
-logError :: Q Exp
-logError = logTH LevelError
-
--- | Generates a function that takes a 'Text' and logs a 'LevelOther' message. Usage:
---
--- > $(logOther "My new level") "This is a log message"
-logOther :: Text -> Q Exp
-logOther = logTH . LevelOther
+import System.Log.FastLogger
 
 -- | Return an 'Unauthorized' value, with the given i18n message.
 unauthorizedI :: RenderMessage master msg => msg -> GHandler sub master AuthResult
diff --git a/yesod-core/Yesod/Dispatch.hs b/yesod-core/Yesod/Dispatch.hs
index 312bd212..0a3e87d9 100644
--- a/yesod-core/Yesod/Dispatch.hs
+++ b/yesod-core/Yesod/Dispatch.hs
@@ -28,7 +28,7 @@ module Yesod.Dispatch
     , WaiSubsite (..)
     ) where
 
-import Data.Functor   ((<$>))
+import Control.Applicative ((<$>), (<*>))
 import Prelude hiding (exp)
 import Yesod.Internal.Core
 import Yesod.Handler hiding (lift)
@@ -53,6 +53,7 @@ import Network.HTTP.Types (status301)
 import Yesod.Routes.TH
 import Yesod.Content (chooseRep)
 import Yesod.Routes.Parse
+import System.Log.FastLogger (Logger)
 
 type Texts = [Text]
 
@@ -119,7 +120,13 @@ mkYesodGeneral name args clazzes isSub resS = do
     let res = map (fmap parseType) resS
     renderRouteDec <- mkRenderRouteInstance arg res
 
-    disp <- mkDispatchClause [|yesodRunner|] [|yesodDispatch|] [|fmap chooseRep|] res
+    let logger = mkName "logger"
+    Clause pat body decs <- mkDispatchClause
+        [|yesodRunner $(return $ VarE logger)|]
+        [|yesodDispatch $(return $ VarE logger)|]
+        [|fmap chooseRep|]
+        res
+    let disp = Clause (VarP logger : pat) body decs
     let master = mkName "master"
     let ctx = if isSub
                 then ClassP (mkName "Yesod") [VarT master] : clazzes
@@ -160,23 +167,24 @@ toWaiApp y = gzip (gzipSettings y) . autohead <$> toWaiAppPlain y
 toWaiAppPlain :: ( Yesod master
                  , YesodDispatch master master
                  ) => master -> IO W.Application
-toWaiAppPlain a = toWaiApp' a <$> makeSessionBackend a
+toWaiAppPlain a = toWaiApp' a <$> getLogger a <*> makeSessionBackend a
 
 
 toWaiApp' :: ( Yesod master
              , YesodDispatch master master
              )
           => master
+          -> Logger
           -> Maybe (SessionBackend master)
           -> W.Application
-toWaiApp' y sb env =
+toWaiApp' y logger sb env =
     case cleanPath y $ W.pathInfo env of
         Left pieces -> sendRedirect y pieces env
         Right pieces ->
-            yesodDispatch y y id app404 handler405 method pieces sb env
+            yesodDispatch logger y y id app404 handler405 method pieces sb env
   where
-    app404 = yesodRunner notFound y y Nothing id
-    handler405 route = yesodRunner badMethod y y (Just route) id
+    app404 = yesodRunner logger notFound y y Nothing id
+    handler405 route = yesodRunner logger badMethod y y (Just route) id
     method = decodeUtf8With lenientDecode $ W.requestMethod env
 
 sendRedirect :: Yesod master => master -> [Text] -> W.Application
@@ -202,4 +210,4 @@ instance RenderRoute WaiSubsite where
     renderRoute (WaiSubsiteRoute ps qs) = (ps, qs)
 
 instance YesodDispatch WaiSubsite master where
-    yesodDispatch _master (WaiSubsite app) _tomaster _404 _405 _method _pieces _session = app
+    yesodDispatch _logger _master (WaiSubsite app) _tomaster _404 _405 _method _pieces _session = app
diff --git a/yesod-core/Yesod/Handler.hs b/yesod-core/Yesod/Handler.hs
index 330e15cb..b519dfae 100644
--- a/yesod-core/Yesod/Handler.hs
+++ b/yesod-core/Yesod/Handler.hs
@@ -138,11 +138,7 @@ import qualified Network.Wai as W
 import qualified Network.HTTP.Types as H
 
 import Text.Hamlet
-#if MIN_VERSION_blaze_html(0, 5, 0)
 import qualified Text.Blaze.Html.Renderer.Text as RenderText
-#else
-import qualified Text.Blaze.Renderer.Text as RenderText
-#endif
 import qualified Data.Text as T
 import Data.Text.Encoding (encodeUtf8, decodeUtf8With)
 import Data.Text.Encoding.Error (lenientDecode)
@@ -165,12 +161,10 @@ import Blaze.ByteString.Builder (toByteString)
 import Data.Text (Text)
 import Yesod.Message (RenderMessage (..))
 
-#if MIN_VERSION_blaze_html(0, 5, 0)
 import Text.Blaze.Html (toHtml, preEscapedToMarkup)
 #define preEscapedText preEscapedToMarkup
-#else
-import Text.Blaze (toHtml, preEscapedText)
-#endif
+
+import System.Log.FastLogger
 
 import qualified Yesod.Internal.Cache as Cache
 import Yesod.Internal.Cache (mkCacheKey, CacheKey)
@@ -183,6 +177,7 @@ import Control.Monad.Base
 import Yesod.Routes.Class
 import Data.Word (Word64)
 import Data.Conduit (Sink)
+import Language.Haskell.TH.Syntax (Loc)
 
 class YesodSubRoute s y where
     fromSubRoute :: s -> y -> Route s -> Route y
@@ -196,6 +191,7 @@ data HandlerData sub master = HandlerData
     , handlerToMaster :: Route sub -> Route master
     , handlerState    :: I.IORef GHState
     , handlerUpload   :: Word64 -> FileUpload
+    , handlerLog      :: Loc -> LogLevel -> LogStr -> IO ()
     }
 
 handlerSubData :: (Route sub -> Route master)
@@ -396,8 +392,9 @@ runHandler :: HasReps c
            -> master
            -> sub
            -> (Word64 -> FileUpload)
+           -> (Loc -> LogLevel -> LogStr -> IO ())
            -> YesodApp
-runHandler handler mrender sroute tomr master sub upload =
+runHandler handler mrender sroute tomr master sub upload log' =
   YesodApp $ \eh rr cts initSession -> do
     let toErrorHandler e =
             case fromException e of
@@ -419,6 +416,7 @@ runHandler handler mrender sroute tomr master sub upload =
             , handlerToMaster = tomr
             , handlerState = istate
             , handlerUpload = upload
+            , handlerLog = log'
             }
     contents' <- catch (fmap Right $ unGHandler handler hd)
         (\e -> return $ Left $ maybe (HCError $ toErrorHandler e) id
@@ -792,6 +790,7 @@ handlerToYAR :: (HasReps a, HasReps b)
              => master -- ^ master site foundation
              -> sub    -- ^ sub site foundation
              -> (Word64 -> FileUpload)
+             -> (Loc -> LogLevel -> LogStr -> IO ())
              -> (Route sub -> Route master)
              -> (Route master -> [(Text, Text)] -> Text) -- route renderer
              -> (ErrorResponse -> GHandler sub master a)
@@ -800,11 +799,11 @@ handlerToYAR :: (HasReps a, HasReps b)
              -> SessionMap
              -> GHandler sub master b
              -> ResourceT IO YesodAppResult
-handlerToYAR y s upload toMasterRoute render errorHandler rr murl sessionMap h =
+handlerToYAR y s upload log' toMasterRoute render errorHandler rr murl sessionMap h =
     unYesodApp ya eh' rr types sessionMap
   where
-    ya = runHandler h render murl toMasterRoute y s upload
-    eh' er = runHandler (errorHandler' er) render murl toMasterRoute y s upload
+    ya = runHandler h render murl toMasterRoute y s upload log'
+    eh' er = runHandler (errorHandler' er) render murl toMasterRoute y s upload log'
     types = httpAccept $ reqWaiRequest rr
     errorHandler' = localNoCurrent . errorHandler
 
@@ -957,3 +956,8 @@ instance MonadResource (GHandler sub master) where
     register = lift . register
     release = lift . release
     resourceMask = lift . resourceMask
+
+instance MonadLogging (GHandler sub master) where
+    monadLoggingLog a b c = do
+        hd <- ask
+        liftIO $ handlerLog hd a b (toLogStr c)
diff --git a/yesod-core/Yesod/Internal/Core.hs b/yesod-core/Yesod/Internal/Core.hs
index 7ead0d1c..11791592 100644
--- a/yesod-core/Yesod/Internal/Core.hs
+++ b/yesod-core/Yesod/Internal/Core.hs
@@ -20,11 +20,6 @@ module Yesod.Internal.Core
     , defaultErrorHandler
       -- * Data types
     , AuthResult (..)
-      -- * Logging
-    , LogLevel (..)
-    , formatLogMessage
-    , fileLocationToString
-    , messageLoggerHandler
       -- * Sessions
     , SessionBackend (..)
     , defaultClientSessionBackend
@@ -82,10 +77,7 @@ import Blaze.ByteString.Builder.Char.Utf8 (fromText)
 import Data.List (foldl')
 import qualified Network.HTTP.Types as H
 import Web.Cookie (SetCookie (..))
-import qualified Data.Text.Lazy as TL
-import qualified Data.Text.Lazy.IO
-import qualified Data.Text.Lazy.Builder as TB
-import Language.Haskell.TH.Syntax (Loc (..), Lift (..))
+import Language.Haskell.TH.Syntax (Loc (..))
 import Text.Blaze (preEscapedToMarkup)
 import Data.Aeson (Value (Array, String))
 import Data.Aeson.Encode (encode)
@@ -94,6 +86,9 @@ import Network.Wai.Middleware.Gzip (GzipSettings, def)
 import Network.Wai.Parse (tempFileSink, lbsSink)
 import qualified Paths_yesod_core
 import Data.Version (showVersion)
+import System.Log.FastLogger (LogLevel (LevelInfo), Logger, mkLogger, loggerDateRef, LogStr (..), loggerPutStr)
+import System.Log.FastLogger.Date (getDate, DateRef)
+import System.IO (stdout)
 
 yesodVersion :: String
 yesodVersion = showVersion Paths_yesod_core.version
@@ -103,7 +98,8 @@ yesodVersion = showVersion Paths_yesod_core.version
 class YesodDispatch sub master where
     yesodDispatch
         :: Yesod master
-        => master
+        => Logger
+        -> master
         -> sub
         -> (Route sub -> Route master)
         -> (Maybe (SessionBackend master) -> W.Application) -- ^ 404 handler
@@ -114,7 +110,8 @@ class YesodDispatch sub master where
         -> W.Application
 
     yesodRunner :: Yesod master
-                => GHandler sub master ChooseRep
+                => Logger
+                -> GHandler sub master ChooseRep
                 -> master
                 -> sub
                 -> Maybe (Route sub)
@@ -285,21 +282,28 @@ $doctype 5
     cookieDomain _ = Nothing
 
     -- | Maximum allowed length of the request body, in bytes.
+    --
+    -- Default: 2 megabytes.
     maximumContentLength :: a -> Maybe (Route a) -> Word64
     maximumContentLength _ _ = 2 * 1024 * 1024 -- 2 megabytes
 
-    -- | Send a message to the log. By default, prints to stdout.
+    -- | Returns a @Logger@ to use for log messages.
+    --
+    -- Default: Sends to stdout and automatically flushes on each write.
+    getLogger :: a -> IO Logger
+    getLogger _ = mkLogger True stdout
+
+    -- | Send a message to the @Logger@ provided by @getLogger@.
     messageLogger :: a
+                  -> Logger
                   -> Loc -- ^ position in source code
                   -> LogLevel
-                  -> Text -- ^ message
+                  -> LogStr -- ^ message
                   -> IO ()
-    messageLogger a loc level msg =
+    messageLogger a logger loc level msg =
         if level < logLevel a
             then return ()
-            else
-                formatLogMessage loc level msg >>=
-                Data.Text.Lazy.IO.putStrLn
+            else formatLogMessage (loggerDateRef logger) loc level msg >>= loggerPutStr logger
 
     -- | The logging level in place for this application. Any messages below
     -- this level will simply be ignored.
@@ -338,37 +342,23 @@ $doctype 5
         | size > 50000 = FileUploadDisk tempFileSink
         | otherwise = FileUploadMemory lbsSink
 
-messageLoggerHandler :: Yesod m
-                     => Loc -> LogLevel -> Text -> GHandler s m ()
-messageLoggerHandler loc level msg = do
-    y <- getYesod
-    liftIO $ messageLogger y loc level msg
-
-data LogLevel = LevelDebug | LevelInfo | LevelWarn | LevelError | LevelOther Text
-    deriving (Eq, Show, Read, Ord)
-
-instance Lift LogLevel where
-    lift LevelDebug = [|LevelDebug|]
-    lift LevelInfo = [|LevelInfo|]
-    lift LevelWarn = [|LevelWarn|]
-    lift LevelError = [|LevelError|]
-    lift (LevelOther x) = [|LevelOther $ T.pack $(lift $ T.unpack x)|]
-
-formatLogMessage :: Loc
+formatLogMessage :: DateRef
+                 -> Loc
                  -> LogLevel
-                 -> Text -- ^ message
-                 -> IO TL.Text
-formatLogMessage loc level msg = do
-    now <- getCurrentTime
-    return $ TB.toLazyText $
-        TB.fromText (T.pack $ show now)
-        `mappend` TB.fromText " ["
-        `mappend` TB.fromText (T.pack $ drop 5 $ show level)
-        `mappend` TB.fromText "] "
-        `mappend` TB.fromText msg
-        `mappend` TB.fromText " @("
-        `mappend` TB.fromText (T.pack $ fileLocationToString loc)
-        `mappend` TB.fromText ") "
+                 -> LogStr -- ^ message
+                 -> IO [LogStr]
+formatLogMessage dateref loc level msg = do
+    now <- getDate dateref
+    return
+        [ LB now
+        , LB " ["
+        , LS $ drop 5 $ show level
+        , LB "] "
+        , msg
+        , LB " @("
+        , LS $ fileLocationToString loc
+        , LB ")\n"
+        ]
 
 -- taken from file-location package
 -- turn the TH Loc loaction information into a human readable string
@@ -381,14 +371,15 @@ fileLocationToString loc = (loc_package loc) ++ ':' : (loc_module loc) ++
     char = show . snd . loc_start
 
 defaultYesodRunner :: Yesod master
-                   => GHandler sub master ChooseRep
+                   => Logger
+                   -> GHandler sub master ChooseRep
                    -> master
                    -> sub
                    -> Maybe (Route sub)
                    -> (Route sub -> Route master)
                    -> Maybe (SessionBackend master)
                    -> W.Application
-defaultYesodRunner handler master sub murl toMasterRoute msb req
+defaultYesodRunner logger handler master sub murl toMasterRoute msb req
   | maximumContentLength master (fmap toMasterRoute murl) < len =
         return $ W.responseLBS
             (H.Status 413 "Too Large")
@@ -419,7 +410,8 @@ defaultYesodRunner handler master sub murl toMasterRoute msb req
                 handler
     let sessionMap = Map.fromList . filter ((/=) tokenKey . fst) $ session
     let ra = resolveApproot master req
-    yar <- handlerToYAR master sub (fileUpload master) toMasterRoute
+    let log' = messageLogger master logger
+    yar <- handlerToYAR master sub (fileUpload master) log' toMasterRoute
         (yesodRender master ra) errorHandler rr murl sessionMap h
     extraHeaders <- case yar of
         (YARPlain _ _ ct _ newSess) -> do
diff --git a/yesod-core/Yesod/Logger.hs b/yesod-core/Yesod/Logger.hs
deleted file mode 100644
index c391ac4f..00000000
--- a/yesod-core/Yesod/Logger.hs
+++ /dev/null
@@ -1,138 +0,0 @@
-{-# LANGUAGE BangPatterns #-}
-module Yesod.Logger
-    ( Logger
-    , handle
-    , developmentLogger, productionLogger
-    , defaultDevelopmentLogger, defaultProductionLogger
-    , toProduction
-    , flushLogger
-    , logText
-    , logLazyText
-    , logString
-    , logBS
-    , logMsg
-    , formatLogText
-    , timed
-    -- * Deprecated
-    , makeLoggerWithHandle
-    , makeDefaultLogger
-    ) where
-
-import System.IO (Handle, stdout, hFlush)
-import Data.ByteString (ByteString)
-import Data.ByteString.Char8 (pack)
-import Data.ByteString.Lazy (toChunks)
-import qualified Data.Text.Lazy as TL
-import Data.Text (Text)
-import Data.Text.Encoding (encodeUtf8)
-import qualified Data.Text.Lazy.Encoding as TLE
-import System.Log.FastLogger
-import Network.Wai.Logger.Date (DateRef, dateInit, getDate)
-
--- for timed logging
-import Data.Time (getCurrentTime, diffUTCTime)
-import Control.Monad.IO.Class (MonadIO, liftIO)
-import Text.Printf (printf)
-import Data.Text (unpack)
-
--- for formatter
-import Language.Haskell.TH.Syntax (Loc)
-import Yesod.Core (LogLevel, fileLocationToString)
-
-data Logger = Logger {
-    loggerLogFun   :: [LogStr] -> IO ()
-  , loggerHandle   :: Handle
-  , loggerDateRef  :: DateRef
-  }
-
-handle :: Logger -> Handle
-handle = loggerHandle
-
-flushLogger :: Logger -> IO ()
-flushLogger = hFlush . loggerHandle
-
-makeDefaultLogger :: IO Logger
-makeDefaultLogger = defaultDevelopmentLogger
-{-# DEPRECATED makeDefaultLogger "Use defaultProductionLogger or defaultDevelopmentLogger instead" #-}
-
-makeLoggerWithHandle, developmentLogger, productionLogger :: Handle -> IO Logger
-makeLoggerWithHandle = productionLogger
-{-# DEPRECATED makeLoggerWithHandle "Use productionLogger or developmentLogger instead" #-}
-
--- | uses stdout handle
-defaultProductionLogger, defaultDevelopmentLogger :: IO Logger
-defaultProductionLogger = productionLogger stdout
-defaultDevelopmentLogger = developmentLogger stdout
-
-
-productionLogger h = mkLogger h (handleToLogFun h)
--- | a development logger gets automatically flushed
-developmentLogger h = mkLogger h (\bs -> (handleToLogFun h) bs >> hFlush h)
-
-mkLogger :: Handle -> ([LogStr] -> IO ()) -> IO Logger
-mkLogger h logFun = do
-    initHandle h
-    dateInit >>= return . Logger logFun h
-
--- convert (a development) logger to production settings
-toProduction :: Logger -> Logger
-toProduction (Logger _ h d) = Logger (handleToLogFun h) h d
-
-handleToLogFun :: Handle -> ([LogStr] -> IO ())
-handleToLogFun = hPutLogStr
-
-logMsg :: Logger -> [LogStr] -> IO ()
-logMsg = hPutLogStr . handle
-
-logLazyText :: Logger -> TL.Text -> IO ()
-logLazyText logger msg = loggerLogFun logger $
-  map LB (toChunks $ TLE.encodeUtf8 msg) ++ [newLine]
-
-logText :: Logger -> Text -> IO ()
-logText logger = logBS logger . encodeUtf8
-
-logBS :: Logger -> ByteString -> IO ()
-logBS logger msg = loggerLogFun logger $ [LB msg, newLine]
-
-logString :: Logger -> String -> IO ()
-logString logger msg = loggerLogFun logger $ [LS msg, newLine]
-
-formatLogText :: Logger -> Loc -> LogLevel -> Text -> IO [LogStr]
-formatLogText logger loc level msg = formatLogMsg logger loc level (toLB msg)
-
-toLB :: Text -> LogStr
-toLB = LB . encodeUtf8
-
-formatLogMsg :: Logger -> Loc -> LogLevel -> LogStr -> IO [LogStr]
-formatLogMsg logger loc level msg = do
-    date <- liftIO $ getDate $ loggerDateRef logger
-    return
-        [ LB date
-        , LB $ pack" ["
-        , LS (drop 5 $ show level)
-        , LB $ pack "] "
-        , msg
-        , LB $ pack " @("
-        , LS (fileLocationToString loc)
-        , LB $ pack ") "
-        ]
-
-newLine :: LogStr
-newLine = LB $ pack "\n"
-
--- | Execute a monadic action and log the duration
---
-timed :: MonadIO m
-      => Logger  -- ^ Logger
-      -> Text  -- ^ Message
-      -> m a     -- ^ Action
-      -> m a     -- ^ Timed and logged action
-timed logger msg action = do
-    start <- liftIO getCurrentTime
-    !result <- action
-    stop <- liftIO getCurrentTime
-    let diff = fromEnum $ diffUTCTime stop start
-        ms = diff `div` 10 ^ (9 :: Int)
-        formatted = printf "  [%4dms] %s" ms (unpack msg)
-    liftIO $ logString logger formatted
-    return result
diff --git a/yesod-core/Yesod/Widget.hs b/yesod-core/Yesod/Widget.hs
index c372b9e7..9c3cb69e 100644
--- a/yesod-core/Yesod/Widget.hs
+++ b/yesod-core/Yesod/Widget.hs
@@ -81,20 +81,16 @@ import Control.Monad.Trans.Control (MonadBaseControl (..))
 import Control.Exception (throwIO)
 import qualified Text.Hamlet as NP
 import Data.Text.Lazy.Builder (fromLazyText)
-#if MIN_VERSION_blaze_html(0, 5, 0)
 import Text.Blaze.Html (toHtml, preEscapedToMarkup)
 import qualified Data.Text.Lazy as TL
-#else
-import Text.Blaze (toHtml, preEscapedLazyText)
-#endif
 import Control.Monad.Base (MonadBase (liftBase))
 import Control.Arrow (first)
 import Control.Monad.Trans.Resource
 
-#if MIN_VERSION_blaze_html(0, 5, 0)
+import System.Log.FastLogger
+
 preEscapedLazyText :: TL.Text -> Html
 preEscapedLazyText = preEscapedToMarkup
-#endif
 
 -- | A generic widget, allowing specification of both the subsite and master
 -- site datatypes. While this is simply a @WriterT@, we define a newtype for
@@ -348,3 +344,6 @@ instance MonadResource (GWidget sub master) where
     register = lift . register
     release = lift . release
     resourceMask = lift . resourceMask
+
+instance MonadLogging (GWidget sub master) where
+    monadLoggingLog a b = lift . monadLoggingLog a b
diff --git a/yesod-core/helloworld.hs b/yesod-core/helloworld.hs
index 4e42a2a5..889e46fe 100644
--- a/yesod-core/helloworld.hs
+++ b/yesod-core/helloworld.hs
@@ -5,7 +5,7 @@
 import Yesod.Core
 import Control.Monad.IO.Class (liftIO)
 import Network.Wai.Handler.Warp (run)
-import Data.Text (unpack)
+import Data.Text (unpack, pack)
 import Text.Julius (julius)
 
 data Subsite = Subsite String
@@ -22,13 +22,13 @@ getSubRootR = do
     Subsite s <- getYesodSub
     tm <- getRouteToMaster
     render <- getUrlRender
-    $(logDebug) "I'm in SubRootR"
+    $logDebug "I'm in SubRootR"
     return $ RepPlain $ toContent $ "Hello Sub World: " ++ s ++ ". " ++ unpack (render (tm SubRootR))
 
 handleSubMultiR :: Yesod m => Strings -> GHandler Subsite m RepPlain
 handleSubMultiR x = do
     Subsite y <- getYesodSub
-    $(logInfo) "In SubMultiR"
+    $logInfo "In SubMultiR"
     return . RepPlain . toContent . show $ (x, y)
 
 data HelloWorld = HelloWorld { getSubsite :: String -> Subsite }
@@ -38,7 +38,7 @@ mkYesod "HelloWorld" [parseRoutes|
 |]
 instance Yesod HelloWorld where
     addStaticContent a b c = do
-        liftIO $ print (a, b, c)
+        $logInfo $ pack $ show (a, b, c)
         return Nothing
 
 getRootR = do
diff --git a/yesod-core/test/YesodCoreTest/CleanPath.hs b/yesod-core/test/YesodCoreTest/CleanPath.hs
index 3b916bc5..10d95497 100644
--- a/yesod-core/test/YesodCoreTest/CleanPath.hs
+++ b/yesod-core/test/YesodCoreTest/CleanPath.hs
@@ -26,7 +26,7 @@ instance RenderRoute Subsite where
     renderRoute (SubsiteRoute x) = (x, [])
 
 instance YesodDispatch Subsite master where
-    yesodDispatch _ _ _ _ _ _ pieces _ _ = return $ responseLBS
+    yesodDispatch _ _ _ _ _ _ _ pieces _ _ = return $ responseLBS
         status200
         [ ("Content-Type", "SUBSITE")
         ] $ L8.pack $ show pieces
diff --git a/yesod-core/test/YesodCoreTest/ErrorHandling.hs b/yesod-core/test/YesodCoreTest/ErrorHandling.hs
index 8267a133..66362c57 100644
--- a/yesod-core/test/YesodCoreTest/ErrorHandling.hs
+++ b/yesod-core/test/YesodCoreTest/ErrorHandling.hs
@@ -24,7 +24,9 @@ mkYesod "App" [parseRoutes|
 instance Yesod App
 
 getHomeR :: Handler RepHtml
-getHomeR = defaultLayout $ toWidget [hamlet|
+getHomeR = do
+    $logDebug "Testing logging"
+    defaultLayout $ toWidget [hamlet|
 $doctype 5
 
 <html>
diff --git a/yesod-core/yesod-core.cabal b/yesod-core/yesod-core.cabal
index ca22b882..756632dc 100644
--- a/yesod-core/yesod-core.cabal
+++ b/yesod-core/yesod-core.cabal
@@ -77,8 +77,7 @@ library
                    , directory             >= 1        && < 1.2
                    , vector                >= 0.9      && < 0.10
                    , aeson                 >= 0.5
-                   , fast-logger           >= 0.0.2
-                   , wai-logger            >= 0.0.1
+                   , fast-logger           >= 0.1      && < 0.2
                    , conduit               >= 0.5      && < 0.6
                    , resourcet             >= 0.3      && < 0.4
                    , lifted-base           >= 0.1      && < 0.2
@@ -89,7 +88,6 @@ library
                      Yesod.Core
                      Yesod.Dispatch
                      Yesod.Handler
-                     Yesod.Logger
                      Yesod.Request
                      Yesod.Widget
                      Yesod.Message