diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 622fb62..835dd0b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -13,7 +13,7 @@ For docs:
 
 ### Setup
 
-    git clone https://github.com/pybricks/pybricks-api
+    git clone --recursive https://github.com/pybricks/pybricks-api
     cd pybricks-api
     pipenv sync --dev