diff --git a/free.cabal b/free.cabal
--- a/free.cabal
+++ b/free.cabal
@@ -1,6 +1,6 @@
 name:          free
 category:      Control, Monads
-version:       1.8.0.1
+version:       1.8.0.3
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -18,6 +18,12 @@
   location: git://github.com/ekmett/free.git
 
 library
+  other-extensions:
+    MultiParamTypeClasses
+    FunctionalDependencies
+    FlexibleInstances
+    UndecidableInstances
+
   build-depends: 
     base >= 4 && < 5,
     distributive >= 0.2 && < 0.3,