diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -39,7 +39,7 @@
     , prefix = ""
       &= typ " <Prefix>"
       &= help "Set a prefix for random addresses generation"
-    } &= summary "ip6addr version 0.5 (C) Michel Boucey 2015"
+    } &= summary "ip6addr version 0.5.0.1 (C) Michel Boucey 2015"
       &= program "ip6addr"
       &= helpArg [name "h"]
       &= details [ "Examples:"
diff --git a/ip6addr.cabal b/ip6addr.cabal
--- a/ip6addr.cabal
+++ b/ip6addr.cabal
@@ -1,5 +1,5 @@
 name:                ip6addr
-version:             0.5.0.0
+version:             0.5.0.1
 synopsis:            Commandline tool to generate IPv6 address text representations
 description:         Commandline tool to generate IPv6 address text representations
 license:             BSD3
@@ -17,8 +17,8 @@
   Location: https://github.com/MichelBoucey/ip6addr.git
 
 executable ip6addr
-  GHC-Options: -Wall
+  GHC-Options: -Wall -O2
   main-is:             Main.hs
   other-extensions:    DeriveDataTypeable, OverloadedStrings
-  build-depends:       base >=4.7 && <4.8, cmdargs,IPv6Addr >= 0.6, text >= 1.2
+  build-depends:       base >=4.7 && <4.9, cmdargs,IPv6Addr >= 0.6, text >= 1.2
   default-language:    Haskell2010