diff --git a/birds-of-paradise.cabal b/birds-of-paradise.cabal
--- a/birds-of-paradise.cabal
+++ b/birds-of-paradise.cabal
@@ -4,7 +4,7 @@
 -- http://haskell.org/cabal/users-guide/
 
 name:                birds-of-paradise
-version:             0.2.0.0
+version:             0.2.1.0
 synopsis:            Birds of Paradise
 description:         Birds of Paradise is yet another SK combinator library.
 homepage:            https://github.com/cutsea110/birds-of-paradise.git