diff --git a/lib/masamune/version.rb b/lib/masamune/version.rb
index ac343c1..6d650c6 100644
--- a/lib/masamune/version.rb
+++ b/lib/masamune/version.rb
@@ -1,3 +1,3 @@
 module Masamune
-  VERSION = '0.8.4'
+  VERSION = '0.9.0'
 end