README.md in slackistrano-0.0.11 vs README.md in slackistrano-0.0.12

- old
+ new

@@ -8,10 +8,10 @@
 
 If you need Capistrano v2 support, check out [capistrano-slack](https://github.com/j-mcnally/capistrano-slack).
 
 ## Requirements
 
-- Capistrano >= 3
+- Capistrano >= 3.1.0
 - Ruby >= 2.0
 - A Slack account
 
 ## Installation
 