diff --git a/README.rdoc b/README.rdoc
index f090750..b82dec6 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -32,8 +32,10 @@ It is meant to be started as a cron job.
 
 == REQUIREMENTS:
 
-* Installed Ruby and rubygems
-* LDAP- and PostgreSQL-Server
+* Ruby-1.8.7, Ruby-1.9.2, jRuby, Rubinius-1.2 or better
+* Rubygems-1.3.5+
+* LDAP-v2 or v3 server
+* PostgreSQL-Server v8.1+
 
 == INSTALL: