diff --git a/egison.cabal b/egison.cabal
--- a/egison.cabal
+++ b/egison.cabal
@@ -1,5 +1,5 @@
 Name:                egison
-Version:             2.1.4
+Version:             2.1.5
 Synopsis:            An Interpreter for the Programming Language Egison
 Description:         An interpreter for the programming language Egison.
                      A feature of Egison is the strong pattern match facility.
diff --git a/hs-src/Compiler/egisonc.hs b/hs-src/Compiler/egisonc.hs
--- a/hs-src/Compiler/egisonc.hs
+++ b/hs-src/Compiler/egisonc.hs
@@ -56,7 +56,7 @@
 -- |Print version information
 showVersionNumber :: Options -> IO Options
 showVersionNumber _ = do
-  putStrLn $ showVersion version
+  putStrLn egisonVersion
   exitWith ExitSuccess
 
 showHelp :: Options -> IO Options
diff --git a/hs-src/Language/Egison/Core.hs b/hs-src/Language/Egison/Core.hs
--- a/hs-src/Language/Egison/Core.hs
+++ b/hs-src/Language/Egison/Core.hs
@@ -11,12 +11,16 @@
 import System.Directory (doesFileExist, removeFile)
 import System.IO
 import Data.IORef
+import Data.Version
 import Paths_egison
 
+egisonVersion :: String
+egisonVersion = showVersion version
+
 -- |A utility function to display the egison console banner
 showBanner :: IO ()
 showBanner = do
-  putStrLn $ "Egison Version " ++ showVersion version ++ " (c) 2011-2012 Satoshi Egi"
+  putStrLn $ "Egison Version " ++ egisonVersion ++ " (c) 2011-2012 Satoshi Egi"
   putStrLn $ "http://hagi.is.s.u-tokyo.ac.jp/~egi/egison/"
   putStrLn $ "Welcome to Egison Interpreter!"