1 files changed, 11 insertions, 0 deletions

diff --git a/README.md b/README.md
index db69683..6b379c5 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Vim Vixen
 
+[![Greenkeeper badge](https://badges.greenkeeper.io/ueokande/vim-vixen.svg)](https://greenkeeper.io/)
+
 [![Join the chat room on Gitter for vim-vixen/vim-vixen](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/vim-vixen/vim-vixen)
 [![CircleCI](https://circleci.com/gh/ueokande/vim-vixen.svg?style=svg)](https://circleci.com/gh/ueokande/vim-vixen)
 [![devDependencies Status](https://david-dm.org/ueokande/vim-vixen/dev-status.svg)](https://david-dm.org/ueokande/vim-vixen?type=dev)
@@ -111,6 +113,15 @@ Set hint characters
 :set hintchars=0123456789
 ```
 
+##### 'adjacenttab' property
+
+Open a new tab on adjacent of the current tab.
+
+```
+:set noadjacenttab  " open a tab at last
+:set adjacenttab    " open a tab adjacently
+```
+
 ### Search engines
 
 Vim Vixen supports search by search engines like Google and Yahoo.