diff --git a/README.md b/README.md
index 375a865..1f2f4cd 100644
--- a/README.md
+++ b/README.md
@@ -85,6 +85,13 @@ The list of requirement to install Errbit is :
  * Ruby 1.9.3 or higher
  * MongoDB 2.2.0 or higher
 
+By default it's the Ruby 2.0.0 to use. But you can define your own ruby
+version with RUBY_VERSION variable between :
+
+ * 1.9.3
+ * 2.0.0
+ * 2.1.0
+
 Installation
 ------------
 
@@ -172,7 +179,7 @@ heroku config:add HEROKU=true
 heroku config:add SECRET_TOKEN="$(bundle exec rake secret)"
 heroku config:add ERRBIT_HOST=some-hostname.example.com
 heroku config:add ERRBIT_EMAIL_FROM=example@example.com
-# This next line is required to access env variables during asset compilation. 
+# This next line is required to access env variables during asset compilation.
 # For more info, go to this link: https://devcenter.heroku.com/articles/labs-user-env-compile
 heroku labs:enable user-env-compile
 git push heroku master
--
libgit2 0.21.2