diff --git a/Changes b/Changes
--- a/Changes
+++ b/Changes
@@ -1,3 +1,13 @@
+[Changes for 0.45 - 2009-05-15]
+
+* Require Cabal 1.2.3+ to work with GHC 6.10 and above.
+* Change unsafe ByteString packing to safe packing to avoid memory corruption.
+  Contributed by: Nicolas Pouillard
+
+[Changes for 0.44 - 2008-06-21]
+
+* Tested against GHC-6.8.3; added the Pugs category; no functional changes.
+
 [Changes for 0.43 - 2008-06-21]
 
 * Properly documented the language extensions we use in the .cabal file.
diff --git a/Data/Yaml/Syck.hsc b/Data/Yaml/Syck.hsc
--- a/Data/Yaml/Syck.hsc
+++ b/Data/Yaml/Syck.hsc
@@ -25,7 +25,7 @@
 import qualified Data.HashTable as Hash
 import qualified Data.ByteString.Char8 as Buf
 import Data.ByteString.Char8 (useAsCStringLen, useAsCString)
-import Data.ByteString.Unsafe (unsafePackCString, unsafePackCStringLen)
+import Data.ByteString (packCString, packCStringLen)
 
 type Buf        = Buf.ByteString
 type YamlTag    = Maybe Buf
@@ -168,7 +168,7 @@
 
 outputCallbackPS :: IORef [Buf] -> SyckEmitter -> CString -> CLong -> IO ()
 outputCallbackPS out emitter buf len = do
-    str <- unsafePackCStringLen (buf, fromEnum len)
+    str <- packCStringLen (buf, fromEnum len)
     str `seq` modifyIORef out (str:)
 
 outputCallback :: SyckEmitter -> CString -> CLong -> IO ()
@@ -349,7 +349,7 @@
 syckNodeTag syckNode = do
     tag <- #{peek SyckNode, type_id} syckNode
     if (tag == nullPtr) then (return Nothing) else do
-        p <- unsafePackCString tag
+        p <- packCString tag
         return $! case Buf.elemIndex '/' p of
             Just n -> let { pre = Buf.take n p; post = Buf.drop (n+1) p } in
                 Just $ Buf.concat [_tagLiteral, pre, _colonLiteral, post]
@@ -386,7 +386,7 @@
 parseNode SyckStr _ syckNode len nid = do
     tag   <- syckNodeTag syckNode
     cstr  <- syck_str_read syckNode
-    buf   <- unsafePackCStringLen (cstr, fromEnum len)
+    buf   <- packCStringLen (cstr, fromEnum len)
     let node = nilNode{ n_elem = EStr buf, n_tag = tag, n_id = nid }
     if tag == Nothing && Buf.length buf == 1 && Buf.index buf 0 == '~'
         then do
diff --git a/HsSyck.cabal b/HsSyck.cabal
--- a/HsSyck.cabal
+++ b/HsSyck.cabal
@@ -1,5 +1,6 @@
 Name:                HsSyck
-Version:             0.44
+Version:             0.45
+Cabal-version:       >= 1.2.3
 Category:            Text, Pugs
 Synopsis:            Fast, lightweight YAML loader and dumper
 Description:         This is a simple YAML ('Yet Another Markup Language') processor,
@@ -15,22 +16,31 @@
 License-File:        LICENSE
 Author:              Audrey Tang
 Maintainer:          audreyt@audreyt.org
-Copyright:           Audrey Tang, Gaal Yahas, 2005, 2006, 2007, 2008
-
-Exposed-modules:     Data.Yaml.Syck
+Copyright:           Audrey Tang, Gaal Yahas, 2005, 2006, 2007, 2008, 2009
 
-Build-Depends:       base, bytestring>=0.9.0.1
 Build-Type:          Simple
-Tested-With:         GHC==6.8.2, GHC==6.8.3
+Tested-With:         GHC==6.8.2, GHC==6.8.3, GHC==6.10.1, GHC==6.10.2
+Data-Files:          Changes
+Extra-Source-Files:  syck/syck.h syck/syck_st.h syck/gram.h syck/yamlbyte.h
 
-extensions:          ForeignFunctionInterface, MagicHash, RecursiveDo,
-                     DeriveDataTypeable, TypeSynonymInstances, PatternGuards
+Flag SybInBase
+    Description: syb was split from base >= 4
+    Default: False
 
-ghc-options:         -funbox-strict-fields
+Library
+    if flag(SybInBase)
+        Build-Depends: base>=3 && <4, bytestring>=0.9.0.1
+    else
+        Build-Depends: base>=4, bytestring>=0.9.0.1, syb
 
-data-files:          Changes
-c-sources:           syck/bytecode.c syck/emitter.c syck/gram.c syck/handler.c
-                     syck/implicit.c syck/node.c syck/syck.c syck/syck_st.c syck/token.c
-                     syck/yaml2byte.c
-extra-source-files:  syck/syck.h syck/syck_st.h syck/gram.h syck/yamlbyte.h
-include-dirs:        syck
+    exposed-modules: Data.Yaml.Syck
+
+    extensions: ForeignFunctionInterface, MagicHash, RecursiveDo,
+                DeriveDataTypeable, TypeSynonymInstances, PatternGuards
+
+    ghc-options: -funbox-strict-fields
+
+    c-sources: syck/bytecode.c syck/emitter.c syck/gram.c syck/handler.c
+               syck/implicit.c syck/node.c syck/syck.c syck/syck_st.c
+               syck/token.c syck/yaml2byte.c
+    include-dirs:        syck