diff --git a/changelog.markdown b/changelog.markdown
--- a/changelog.markdown
+++ b/changelog.markdown
@@ -1,3 +1,8 @@
+2008.9.20
+----------
+
+* Relax GHC package dependencies
+
 2008.9.19
 ---------
 
diff --git a/mps.cabal b/mps.cabal
--- a/mps.cabal
+++ b/mps.cabal
@@ -1,5 +1,5 @@
 Name:                 mps
-Version:              2008.9.19
+Version:              2008.9.20
 Build-type: 		      Simple
 Synopsis:             message passing style helpers
 Description:          message passing style helpers
@@ -14,5 +14,5 @@
 homepage:             http://github.com/nfjinjing/mps/
 
 library
-  build-depends: base, containers, array, parallel, fgl, QuickCheck, time, bytestring >= 0.9.1.2, pandoc >= 0.46, regexpr >= 0.2.9, parsec >= 2.1.0, utf8-string >= 0.3.1, directory
+  build-depends: base, containers, array, parallel, fgl, QuickCheck, time, bytestring >= 0.9, pandoc >= 0.46, regexpr >= 0.2.9, parsec >= 2, utf8-string >= 0.3.1, directory
   exposed-modules: MPS, MPS.Snippets, MPS.Hack.Dot