diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 1.4.5
+
+* Fix warnings
+
 ## 1.4.4
 
 * Reduce dependencies
diff --git a/Yesod/Default/Config2.hs b/Yesod/Default/Config2.hs
--- a/Yesod/Default/Config2.hs
+++ b/Yesod/Default/Config2.hs
@@ -28,10 +28,6 @@
 
 import Data.Yaml.Config
 
-#if __GLASGOW_HASKELL__ < 710
-import Control.Applicative ((<$>))
-import Data.Monoid
-#endif
 import Data.Semigroup
 import Data.Aeson
 import qualified Data.HashMap.Strict as H
diff --git a/Yesod/Default/Main.hs b/Yesod/Default/Main.hs
--- a/Yesod/Default/Main.hs
+++ b/Yesod/Default/Main.hs
@@ -41,8 +41,7 @@
 --   > main :: IO ()
 --   > main = defaultMain (fromArgs parseExtra) makeApplication
 --
-defaultMain :: (Show env, Read env)
-            => IO (AppConfig env extra)
+defaultMain :: IO (AppConfig env extra)
             -> (AppConfig env extra -> IO Application)
             -> IO ()
 defaultMain load getApp = do
@@ -60,8 +59,7 @@
 -- @Application@ to install Warp exception handlers.
 --
 -- Since 1.2.5
-defaultMainLog :: (Show env, Read env)
-               => IO (AppConfig env extra)
+defaultMainLog :: IO (AppConfig env extra)
                -> (AppConfig env extra -> IO (Application, LogFunc))
                -> IO ()
 defaultMainLog load getApp = do
@@ -113,8 +111,7 @@
 -- | Run your development app using a custom environment type and loader
 --   function
 defaultDevelApp
-    :: (Show env, Read env)
-    => IO (AppConfig env extra) -- ^ A means to load your development @'AppConfig'@
+    :: IO (AppConfig env extra) -- ^ A means to load your development @'AppConfig'@
     -> (AppConfig env extra -> IO Application) -- ^ Get your @Application@
     -> IO (Int, Application)
 defaultDevelApp load getApp = do
diff --git a/yesod.cabal b/yesod.cabal
--- a/yesod.cabal
+++ b/yesod.cabal
@@ -1,5 +1,5 @@
 name:            yesod
-version:         1.4.4
+version:         1.4.5
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>