diff --git a/README.md b/README.md
index 39bf6d5b85bb4fd1df934d1cec35e029b06a1595..4822a803a3c63c5785e5f7699bcb1874a50cc131 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,20 @@
 # sense-hat
 
+## Optional virtual env
 
-## Utilisation
+`python3 -m venv sense-hat-env`
+
+`source sense-hat-env/bin/activate`
+
+
+## Installation
 
 `git clone https://gitlab.irstea.fr/raspberry-pi/sense-hat.git`
 
-`requirements.txt` TODO
+`sudo apt install libatlas-base-dev python3-sense-hat`
+
+`pip3 install -r sense-hat/requirements.txt`
+
+## Utilisation
 
-`python3 sense-hat/environmental_sensors.py`
\ No newline at end of file
+`python3 sense-hat/environmental_sensors.py`