diff --git a/Data/PoliMorf.hs b/Data/PoliMorf.hs
--- a/Data/PoliMorf.hs
+++ b/Data/PoliMorf.hs
@@ -12,6 +12,7 @@
   Form
 , Base
 , Tag
+, Cat
 , Entry (..)
 
 -- * Parsing
diff --git a/polimorf.cabal b/polimorf.cabal
--- a/polimorf.cabal
+++ b/polimorf.cabal
@@ -1,5 +1,5 @@
 name:               polimorf
-version:            0.4.0
+version:            0.4.1
 synopsis:           Working with the PoliMorf dictionary
 description:
     The library provides functionality for manipulating PoliMorf, the