diff --git a/packages/react-navigation/docs/guides/Contributors.md b/packages/react-navigation/docs/guides/Contributors.md
index 416d45ac..500262e9 100644
--- a/packages/react-navigation/docs/guides/Contributors.md
+++ b/packages/react-navigation/docs/guides/Contributors.md
@@ -22,6 +22,7 @@ npm install
 ### Run the example app
 
 ```
+npm install
 cd examples/NavigationPlayground
 npm install
 cd ../..