README.md in outreach-0.1.3 vs README.md in outreach-0.2.0

@@ -105,9 +105,12 @@
 You can find a specific prospect given the prospect id:
 ```ruby
   outreach.prospects.find(2345)
 ```
 
+## Ruby versions older than 2.4
+Install the 0.1.3 version
+
 ## Contributing
 
 1. Fork it ( https://github.com/[my-github-username]/outreach/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)