diff --git a/Dixi/Config.hs b/Dixi/Config.hs
--- a/Dixi/Config.hs
+++ b/Dixi/Config.hs
@@ -11,16 +11,15 @@
 import Control.Monad ((<=<))
 import Data.Aeson
 import Data.Default
-import Data.Maybe (fromMaybe, catMaybes)
+import Data.Maybe (catMaybes)
 import Data.Monoid (Last (..), Monoid (..))
 import Data.Time (UTCTime, formatTime)
 import Data.Time.Locale.Compat
-import Data.Time.Zones.All (toTZName, fromTZName, tzByLabel, TZLabel (..))
-import Data.Time.Zones (utcToLocalTimeTZ)
+import Data.Time.LocalTime.TimeZone.Olson
+import Data.Time.LocalTime.TimeZone.Series
 import GHC.Generics
 import Text.Pandoc hiding (Format, readers)
 import Text.Pandoc.Error
-import qualified Data.ByteString.Char8 as B
 
 import Dixi.Pandoc.Wikilinks
 
@@ -63,7 +62,7 @@
 
 defaultConfig :: Config
 defaultConfig = Config 8000 "state"
-                       (TimeConfig (B.unpack $ toTZName Etc__UTC) "%T, %F")
+                       (TimeConfig "Etc/UTC" "%T, %F")
                        (Format "org")
                        ("http://localhost:8000")
                        ["wikilinks"]
@@ -91,15 +90,16 @@
               = [("wikilinks", EndoIO $ wikilinks url)
                 ]
 
-configToRenders :: Config -> Renders
-configToRenders cfg@(Config {..}) = Renders {..}
-  where renderTime (Last Nothing) = "(never)"
-        renderTime (Last (Just t)) = let label = fromMaybe Etc__UTC (fromTZName $ B.pack $ timezone time)
-                                      in formatTime defaultTimeLocale (format time) $ utcToLocalTimeTZ (tzByLabel label) t
-        pandocReader | Format f <- readerFormat 
-          = case lookup f readers of
-              Just r -> r
-              Nothing -> readOrg
-        pandocWriterOptions = def { writerSourceURL = Just url }
+configToRenders :: Config -> IO Renders
+configToRenders cfg@(Config {..}) = do
+  olsonData <- getTimeZoneSeriesFromOlsonFile ("/usr/share/zoneinfo/" ++ timezone time)
+  let renderTime (Last Nothing) = "(never)"
+      renderTime (Last (Just t)) = formatTime defaultTimeLocale (format time) $ utcToLocalTime' olsonData t
+      pandocReader | Format f <- readerFormat 
+        = case lookup f readers of
+            Just r -> r
+            Nothing -> readOrg
+      pandocWriterOptions = def { writerSourceURL = Just url }
 
-        pandocProcessors = mconcat $ catMaybes $ map (flip lookup $ allProcessors cfg) processors
+      pandocProcessors = mconcat $ catMaybes $ map (flip lookup $ allProcessors cfg) processors
+  return $ Renders {..}
diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -40,8 +40,8 @@
 spacesToUScores :: T.Text -> T.Text
 spacesToUScores = T.pack . map (\x -> if x == ' ' then '_' else x) . T.unpack
 
-page :: AcidState Database -> Config -> Key -> Server PageAPI
-page db cfg (spacesToUScores -> key)
+page :: AcidState Database -> Renders -> Key -> Server PageAPI
+page db renders (spacesToUScores -> key)
   =  latest
   |: history
   where
@@ -77,9 +77,8 @@
 
     rp k v p = return (RP renders k v p)
 
-    renders = configToRenders cfg
 
-server :: AcidState Database -> Config -> Server Dixi
+server :: AcidState Database -> Renders -> Server Dixi
 server db cfg =  page db cfg
               |: page db cfg "Main_Page"
 
@@ -109,4 +108,4 @@
      db <- openLocalStateFrom storage emptyDB
      createCheckpoint db
      createArchive    db
-     run port $ serve dixi $ server db cfg
+     run port . serve dixi . server db =<< configToRenders cfg
diff --git a/dixi.cabal b/dixi.cabal
--- a/dixi.cabal
+++ b/dixi.cabal
@@ -2,7 +2,7 @@
 -- see http://haskell.org/cabal/users-guide/
 
 name:                dixi
-version:             0.5.0.0
+version:             0.5.1.0
 synopsis:            A wiki implemented with a firm theoretical foundation.
 description:         This project is a simple wiki developed based on a
                      firm theoretical foundation.
@@ -54,24 +54,25 @@
                      , pandoc >= 1.15 &&  < 1.16 , pandoc-types >= 1.12 && < 1.13
                      , servant >= 0.4 && < 0.5
                      , acid-state >= 0.12 && <0.14 , safecopy >= 0.8.3 && < 0.9
-                     , lens >= 4.12 && < 4.14, servant-server >= 0.4 && < 0.5
+                     , lens >= 4.7 && < 4.14, servant-server >= 0.4 && < 0.5
                      , blaze-html >= 0.8 && < 0.9 , servant-blaze >= 0.4 && < 0.5, blaze-markup >= 0.7 && <0.8
                      , shakespeare >= 2.0 && < 2.1
                      , containers >= 0.5 && < 0.6 , text >= 1.2 && < 1.3
                      , vector >= 0.10 && <0.12
-                     , transformers >= 0.4 && < 0.5
-                     , warp >= 3.1 && <3.2
+                     , transformers >= 0.3 && < 0.5
+                     , warp >= 3.0 && <3.2
                      , data-default >= 0.5 && <0.6
-                     , either >= 4.4 && <4.5
+                     , either >= 4.3 && <4.5
                      , template-haskell
                      , yaml >= 0.8 && < 0.9
                      , aeson >= 0.8 && <  0.11
                      , directory >= 1.0 && < 1.3
                      , time >= 1.4 && < 1.6
                      , time-locale-compat >= 0.1 && < 0.2
-                     , tz >= 0.0 && < 0.1
                      , bytestring >= 0.10 && < 0.11
                      , network-uri >= 2.6 && < 2.7 
+                     , timezone-olson >= 0.1 && < 0.2
+                     , timezone-series >= 0.1 && < 0.2
 
   -- hs-source-dirs:      
   default-language:    Haskell2010