README.md in oxidized-0.26.3 vs README.md in oxidized-0.27.0

@@ -6,11 +6,11 @@
 [![Gem Version](https://badge.fury.io/rb/oxidized.svg)](http://badge.fury.io/rb/oxidized)
 [![Join the chat at https://gitter.im/oxidized/Lobby](https://badges.gitter.im/oxidized/Lobby.svg)](https://gitter.im/oxidized/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 Oxidized is a network device configuration backup tool. It's a RANCID replacement!
 
-Light and extensible, Oxidized supports over 90 operating system types.
+Light and extensible, Oxidized supports more than 120 operating system types.
 
 Feature highlights:
 
 * Automatically adds/removes threads to meet configured retrieval interval
 * Restful API to a move node immediately to head-of-queue (GET/POST /node/next/[NODE])
@@ -102,10 +102,10 @@
 
 Install Ruby 2.3 from [SCL](https://www.softwarecollections.org/en/scls/rhscl/rh-ruby23/):
 
 ```shell
 yum install centos-release-scl
-yum install rh-ruby23 rh-ruby23-devel
+yum install rh-ruby23 rh-ruby23-ruby-devel
 scl enable rh-ruby23 bash
 ```
 
 The following additional packages will be required to build the dependencies: