diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index b58adc60d09..e297f2aaaae 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -23,7 +23,7 @@ Hosting Rails applications is complicated. Even if you already have Postgres, Re
 
 - [Postgres 9.5+](http://www.postgresql.org/download/)
 - [Redis 2.6+](http://redis.io/download)
-- [Ruby 2.3+](http://www.ruby-lang.org/en/downloads/) (we recommend 2.3.1 or higher)
+- [Ruby 2.4+](http://www.ruby-lang.org/en/downloads/) (we recommend 2.4.4 or higher)
 
 ## Security