diff --git a/doc/INSTALL b/doc/INSTALL
index f8b6babc2..e7badf150 100644
--- a/doc/INSTALL
+++ b/doc/INSTALL
@@ -7,7 +7,7 @@ http://www.redmine.org/
 
 == Requirements
 
-* Ruby 1.8.6 or 1.8.7
+* Ruby 1.8.7, 1.9.2 or 1.9.3
 * RubyGems
 * Bundler >= 1.0.21