diff --git a/Data/TCP.hs b/Data/TCP.hs
--- a/Data/TCP.hs
+++ b/Data/TCP.hs
@@ -2,6 +2,7 @@
 module Data.TCP
         ( TCPPort (..)
         , TCPHeader (..)
+        , TCPFlag (..)
         ) where
 
 import Data.Serialize
diff --git a/network-data.cabal b/network-data.cabal
--- a/network-data.cabal
+++ b/network-data.cabal
@@ -1,5 +1,5 @@
 name:           network-data
-version:        0.3.0
+version:        0.4
 license:        BSD3
 license-file:   LICENSE
 author:         Thomas DuBuisson <thomas.dubuisson@gmail.com>