diff --git a/penny-bin.cabal b/penny-bin.cabal
--- a/penny-bin.cabal
+++ b/penny-bin.cabal
@@ -1,5 +1,5 @@
 Name: penny-bin
-Version: 0.2.0.0
+Version: 0.4.0.0
 Cabal-version: >=1.8
 Build-Type: Simple
 License: MIT
@@ -49,7 +49,7 @@
 Executable penny
   Build-depends:
     base ==4.*,
-    penny-lib ==0.2.*
+    penny-lib ==0.4.*
 
   Main-is: penny.hs
   GHC-Options: -Wall