diff --git a/doc/SETUP_DEVELOPMENT.md b/doc/SETUP_DEVELOPMENT.md
index 319c2787..ac086416 100644
--- a/doc/SETUP_DEVELOPMENT.md
+++ b/doc/SETUP_DEVELOPMENT.md
@@ -12,7 +12,7 @@ If instead you just want to run Foodsoft without changing its code, please refer
 
 **System requirements**:
 [rbenv](https://github.com/rbenv/rbenv),
-[Ruby 2.6+](https://www.ruby-lang.org/en/downloads/),
+[Ruby 2.7+](https://www.ruby-lang.org/en/downloads/),
 [Bundler](http://bundler.io/),
 [MySQL](http://mysql.com/) / [SQLite](http://sqlite.org/), 
 [Redis](http://redis.io/) (optional).
@@ -32,6 +32,10 @@ If instead you just want to run Foodsoft without changing its code, please refer
     Have a look how to avoid that in the [Docker Development Setup](./SETUP_DEVELOPMENT_DOCKER.md#prerequisites-windows-only)
     instructions.
 
+1. Install developement packages. For Debian/Ubuntu:
+
+        sudo apt install default-libmysqlclient-dev libmagic-dev libxml2-dev libxslt-dev
+
 1. Install and setup rbenv and Bundler. For Debian/Ubuntu:
 
         sudo apt install rbenv
@@ -175,4 +179,4 @@ within a docker image. While the default [`Dockerfile`](../Dockerfile) is setup
 use docker-compose (using [`docker-compose-dev.yml`](../docker-compose-dev.yml)) to
 setup the whole stack at once.
 
-See [Setup Development Docker](./SETUP_DEVELOPMENT_DOCKER.md) for a detailed description.
\ No newline at end of file
+See [Setup Development Docker](./SETUP_DEVELOPMENT_DOCKER.md) for a detailed description.