diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c4196ce..6e23977 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -31,7 +31,7 @@ Install Docker-compose.
 ```bash
 $ cd autonomic.zone
 $ python3 -m venv .venv
-$ pip install -r requirements.txt
+$ pip3 install -r requirements.txt
 ```
 
 Then fire up the container with the following.