diff --git a/Text/ParserCombinators/Class.hs b/Text/ParserCombinators/Class.hs
--- a/Text/ParserCombinators/Class.hs
+++ b/Text/ParserCombinators/Class.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE TypeFamilies, NoMonomorphismRestriction #-}
+{-# LANGUAGE TypeFamilies, NoMonomorphismRestriction, FlexibleContexts #-}
 
 module Text.ParserCombinators.Class where
 import Data.Char
diff --git a/parsek.cabal b/parsek.cabal
--- a/parsek.cabal
+++ b/parsek.cabal
@@ -1,5 +1,5 @@
 name:           parsek
-version:        1.0.1.2
+version:        1.0.1.3
 category:       Parsing
 synopsis:       Parallel Parsing Processes
 description: Koen Claessen's PPP, Modified.