diff --git a/sha-streams.cabal b/sha-streams.cabal
--- a/sha-streams.cabal
+++ b/sha-streams.cabal
@@ -1,9 +1,9 @@
 name:                sha-streams
-version:             0.2.0
+version:             0.2.1
 Cabal-Version:       >= 1.8
 synopsis:            SHA hashes for io-streams.
 description:         SHA hashes for io-streams.
-category:            System
+category:            System, IO-Streams
 license:             BSD3
 license-file:        LICENSE
 author:              Vo Minh Thu