diff --git a/GHCMod.hs b/GHCMod.hs
index 9576be7..04de71e 100644
--- a/GHCMod.hs
+++ b/GHCMod.hs
@@ -21,7 +21,7 @@ import Types
 ----------------------------------------------------------------
 
 usage :: String
-usage =    "ghc-mod version 0.6.2\n"
+usage =    "ghc-mod version 1.0.0\n"
         ++ "Usage:\n"
         ++ "\t ghc-mod list [-l]\n"
         ++ "\t ghc-mod lang [-l]\n"
diff --git a/elisp/ghc.el b/elisp/ghc.el
index 8224c2f..0d1526b 100644
--- a/elisp/ghc.el
+++ b/elisp/ghc.el
@@ -16,7 +16,7 @@
 
 ;;; Code:
 
-(defconst ghc-version "0.6.1")
+(defconst ghc-version "1.0.0")
 
 ;; (eval-when-compile
 ;;  (require 'haskell-mode))
diff --git a/ghc-mod.cabal b/ghc-mod.cabal
index 0f38f53..769e8b7 100644
--- a/ghc-mod.cabal
+++ b/ghc-mod.cabal
@@ -1,5 +1,5 @@
 Name:                   ghc-mod
-Version:                0.6.2
+Version:                1.0.0
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3