diff --git a/HsHyperEstraier.cabal b/HsHyperEstraier.cabal
--- a/HsHyperEstraier.cabal
+++ b/HsHyperEstraier.cabal
@@ -5,16 +5,16 @@
     Haskell. HyperEstraier is an embeddable full text search engine
     which is supposed to be independent to any particular natural
     languages.
-Version:       0.2.1
+Version:       0.3
 License:       PublicDomain
 License-File:  COPYING
 Author:        PHO <pho at cielonegro dot org>
 Maintainer:    PHO <pho at cielonegro dot org>
 Stability:     experimental
-Homepage:      http://ccm.sherry.jp/HsHyperEstraier/
+Homepage:      http://cielonegro.org/HsHyperEstraier.html
 Category:      Text
 Tested-With:   GHC == 6.8.1
-Cabal-Version: >= 1.2
+Cabal-Version: >= 1.2.3
 Build-Type:    Simple
 
 Extra-Source-Files:
diff --git a/NEWS b/NEWS
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
+Changes from 0.2.1 to 0.3
+* Fixed breakage on GHC 6.10.1. And now it requires 6.10.1...
+
 Changes from 0.2 to 0.2.1
 -------------------------
 * Only changes to various meta-data; no semantical changes to the code itself.
diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -1,4 +1,4 @@
 #!/usr/bin/env runghc
 
 import Distribution.Simple
-main = defaultMainWithHooks defaultUserHooks
+main = defaultMainWithHooks simpleUserHooks
diff --git a/Text/HyperEstraier/Condition.hsc b/Text/HyperEstraier/Condition.hsc
--- a/Text/HyperEstraier/Condition.hsc
+++ b/Text/HyperEstraier/Condition.hsc
@@ -1,6 +1,6 @@
 #include "estraier.h"
 
--- #prune
+{-# OPTIONS_HADDOCK prune #-}
 
 -- |An interface to functions to manipulate search conditions.
 
diff --git a/Text/HyperEstraier/Database.hsc b/Text/HyperEstraier/Database.hsc
--- a/Text/HyperEstraier/Database.hsc
+++ b/Text/HyperEstraier/Database.hsc
@@ -66,7 +66,6 @@
 import           Data.Bits
 import qualified Data.ByteString as Strict (ByteString)
 import qualified Data.ByteString.Char8 as C8 hiding (ByteString)
-import           Data.Dynamic
 import           Data.IORef
 import           Data.Maybe
 import           Data.Typeable
@@ -82,8 +81,7 @@
 import           Text.HyperEstraier.Document
 import           Text.HyperEstraier.Utils
 
--- |'EstError' represents an error occured on various operations. It
--- is usually thrown as a 'Control.Exception.DynException'.
+-- |'EstError' represents an error occured on various operations.
 data EstError
     = InvalidArgument -- ^ An argument passed to the function was invalid.
     | AccessForbidden -- ^ The operation is forbidden.
@@ -94,7 +92,11 @@
     | MiscError       -- ^ Errors for other reasons.
     deriving (Eq, Show, Typeable)
 
+instance Exception EstError where
+    toException = SomeException
+    fromException (SomeException e) = cast e
 
+
 unmarshalError :: Int -> EstError
 unmarshalError (#const ESTEINVAL ) = InvalidArgument
 unmarshalError (#const ESTEACCES ) = AccessForbidden
@@ -372,10 +374,6 @@
 wrapDB dbPtr = newIORef dbPtr >>= return . Database
 
 
-throwEstError :: EstError -> IO a
-throwEstError = throwIO . DynException . toDyn
-
-
 withDBPtr :: Database -> (Ptr ESTMTDB -> IO a) -> IO a
 withDBPtr (Database ref) f
     = do dbPtr <- readIORef ref
@@ -394,7 +392,7 @@
       openDB' :: IO Database
       openDB' = do ret <- openDatabase fpath opts
                    case ret of
-                     Left  err -> throwEstError err
+                     Left  err -> throwIO err
                      Right db  -> return db
 
 -- |@'openDatabase' fpath mode@ opens a database at @fpath@. If it
@@ -428,14 +426,14 @@
           = alloca $ \ errPtr ->
             do ret <- _close dbPtr errPtr
                case ret of
-                 0 -> peek errPtr >>= throwEstError . unmarshalError
+                 0 -> peek errPtr >>= throwIO . unmarshalError
                  _ -> writeIORef ref nullPtr
 
 
 throwLastError :: Database -> IO a
 throwLastError db
     = withDBPtr db $ \ dbPtr ->
-      _error dbPtr >>= throwEstError . unmarshalError
+      _error dbPtr >>= throwIO . unmarshalError
 
 
 throwLastErrorIf :: Database -> Bool -> IO ()
diff --git a/Text/HyperEstraier/Document.hsc b/Text/HyperEstraier/Document.hsc
--- a/Text/HyperEstraier/Document.hsc
+++ b/Text/HyperEstraier/Document.hsc
@@ -1,4 +1,4 @@
--- #prune
+{-# OPTIONS_HADDOCK prune #-}
 
 -- |An interface to manipulate documents of the HyperEstraier.