diff --git a/Rookbook.props b/Rookbook.props
index 89a1965..aeee26f 100644
--- a/Rookbook.props
+++ b/Rookbook.props
@@ -1,2 +1,2 @@
-release: 2.6.6
-copyright: copyright(c) 2006-2010 kuwata-lab.com all rights reserved.
+release: 2.7.0
+copyright: copyright(c) 2006-2011 kuwata-lab.com all rights reserved.