diff --git a/README_EN.md b/README_EN.md
index e43be2875..40a39ae01 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -21,7 +21,7 @@ Frontend tools used include [SCSS](http://sass-lang.com/) over [Foundation](http
 
 ## Configuration for development and test environments
 
-Prerequisites: install git, ImageMagick, Ruby 2.2.2, bundler gem and PostgreSQL.
+Prerequisites: install git, ImageMagick, Ruby 2.2.2, bundler gem and PostgreSQL (>=9.4).
 
 ```
 cd participacion