diff --git a/Network/Socket/Internal.hsc b/Network/Socket/Internal.hsc
--- a/Network/Socket/Internal.hsc
+++ b/Network/Socket/Internal.hsc
@@ -1,4 +1,4 @@
-{-# LANGUAGE CPP, ForeignFunctionInterface #-}
+{-# LANGUAGE CPP, FlexibleInstances, ForeignFunctionInterface #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Network.Socket.Internal
diff --git a/network.cabal b/network.cabal
--- a/network.cabal
+++ b/network.cabal
@@ -1,5 +1,5 @@
 name:           network
-version:        2.3.0.3
+version:        2.3.0.4
 license:        BSD3
 license-file:   LICENSE
 maintainer:     Johan Tibell <johan.tibell@gmail.com>