diff --git a/parcom-lib.cabal b/parcom-lib.cabal
--- a/parcom-lib.cabal
+++ b/parcom-lib.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                parcom-lib
-version:             0.4.0.0
+version:             0.4.0.1
 synopsis:            A simple parser-combinator library, a bit like Parsec but without the frills
 description:         Parcom provides parser combinator functionality in a string-type-agnostic way;
                      it supports strict ByteStrings (with Word8 tokens) and any list type (with
@@ -36,8 +36,8 @@
   -- other-modules:       
   build-depends: base ==4.5.*
                , containers ==0.4.*
-               , bytestring ==0.9.*
+               , bytestring >=0.9 && < 1.0
                , word8
                , mtl == 2.1.*
-               , transformers == 0.3.*
-               , text == 0.11.*
+               , transformers >= 0.3 && < 1.0
+               , text >= 0.11 && < 1.0