diff --git a/Web/Groonga/Server.hs b/Web/Groonga/Server.hs
--- a/Web/Groonga/Server.hs
+++ b/Web/Groonga/Server.hs
@@ -10,8 +10,13 @@
 import Foreign.Ptr (Ptr)
 import Network.Wai.Middleware.RequestLogger (logStdoutDev)
 import System.Directory
+#if !MIN_VERSION_time(1,5,0)
 import Data.Time
 import System.Locale
+#else
+import Data.Time hiding (TimeLocale)
+import System.Locale hiding (defaultTimeLocale)
+#endif
 import Control.Applicative ((<$>))
 
 type GrnCtx = Ptr C'_grn_ctx
@@ -97,7 +102,8 @@
 
       get_current_time_as_double :: IO Double
       get_current_time_as_double = do
-        epoch_double <- (read <$> formatTime defaultTimeLocale "%s.%q" <$> getCurrentTime) :: IO Double
+        epoch_double <- (read <$> formatTime defaultTimeLocale "%s.%q"
+                              <$> getCurrentTime) :: IO Double
         return epoch_double
 
       format_response :: (Show a, Num a) => Int -> a -> a -> String -> String
diff --git a/haroonga-httpd.cabal b/haroonga-httpd.cabal
--- a/haroonga-httpd.cabal
+++ b/haroonga-httpd.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                haroonga-httpd
-version:             0.1.0.0
+version:             0.1.1.0
 synopsis:            Yet another Groonga http server.
 description:         Yet another Groonga http server written in Haskell.
 license:             LGPL-2.1
@@ -19,10 +19,11 @@
   main-is:             Main.hs
   other-modules:       Web.Groonga.Server
                        Web.Groonga.App
-  default-extensions:  OverloadedStrings
+  default-extensions:  OverloadedStrings,
+                       CPP
   build-depends:       base                 >= 4.6     && < 5
                      , directory            >= 1.2     && < 1.3
-                     , time                 >= 1.4     && < 1.5
+                     , time                 >= 1.4     && < 1.6
                      , old-locale           >= 1.0     && < 1.1
                      , text                 >= 1.2     && < 2.0
                      , transformers         >= 0.3     && < 0.5