diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,13 @@
+## 3.1.12
+
+* Setting lower bound for auto-update [#495](https://github.com/yesodweb/wai/issues/495)
+
+## 3.1.11
+
+* Providing a new API: killManager.
+* Preventing space leaks due to Weak ThreadId [#488](https://github.com/yesodweb/wai/issues/488)
+* Setting upper bound for http2.
+
 ## 3.1.10
 
 * `setFileInfoCacheDuration`
diff --git a/Network/Wai/Handler/Warp/Date.hs b/Network/Wai/Handler/Warp/Date.hs
--- a/Network/Wai/Handler/Warp/Date.hs
+++ b/Network/Wai/Handler/Warp/Date.hs
@@ -5,9 +5,6 @@
   , getDate
   , DateCache
   , GMTDate
-#if WINDOWS
-  , uToH
-#endif
   ) where
 
 #if __GLASGOW_HASKELL__ < 709
diff --git a/Network/Wai/Handler/Warp/FdCache.hs b/Network/Wai/Handler/Warp/FdCache.hs
--- a/Network/Wai/Handler/Warp/FdCache.hs
+++ b/Network/Wai/Handler/Warp/FdCache.hs
@@ -10,7 +10,7 @@
   ) where
 
 type Refresh = IO ()
-data MutableFdCache = MutableFdCache
+type MutableFdCache = ()
 
 withFdCache :: Int -> (Maybe MutableFdCache -> IO a) -> IO a
 withFdCache _ f = f Nothing
diff --git a/Network/Wai/Handler/Warp/FileInfoCache.hs b/Network/Wai/Handler/Warp/FileInfoCache.hs
--- a/Network/Wai/Handler/Warp/FileInfoCache.hs
+++ b/Network/Wai/Handler/Warp/FileInfoCache.hs
@@ -15,11 +15,6 @@
 import Network.HTTP.Date
 import System.PosixCompat.Files
 
-#if WINDOWS
-import Data.Time (UTCTime)
-import Network.Wai.Handler.Warp.Date (uToH)
-#endif
-
 ----------------------------------------------------------------
 
 -- | File information.
diff --git a/Network/Wai/Handler/Warp/Response.hs b/Network/Wai/Handler/Warp/Response.hs
--- a/Network/Wai/Handler/Warp/Response.hs
+++ b/Network/Wai/Handler/Warp/Response.hs
@@ -55,7 +55,9 @@
 import Network.Wai
 import Network.Wai.Handler.Warp.Buffer (toBuilderBuffer)
 import qualified Network.Wai.Handler.Warp.Date as D
+#ifndef WINDOWS
 import qualified Network.Wai.Handler.Warp.FdCache as F
+#endif
 import Network.Wai.Handler.Warp.File
 import Network.Wai.Handler.Warp.Header
 import Network.Wai.Handler.Warp.IO (toBufIOWith)
diff --git a/warp.cabal b/warp.cabal
--- a/warp.cabal
+++ b/warp.cabal
@@ -1,5 +1,5 @@
 Name:                warp
-Version:             3.1.11
+Version:             3.1.12
 Synopsis:            A fast, light-weight web server for WAI applications.
 License:             MIT
 License-file:        LICENSE
@@ -34,7 +34,7 @@
 Library
   Build-Depends:     base                      >= 3        && < 5
                    , array
-                   , auto-update               >= 0.1.1    && < 0.2
+                   , auto-update               >= 0.1.3    && < 0.2
                    , blaze-builder             >= 0.4
                    , bytestring                >= 0.9.1.4
                    , bytestring-builder