diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 33b698ee3..ee7a43ea9 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -77,9 +77,13 @@ Start the container:
 
     make docker-run
 
-Inside the container, update dependencies:
+Inside the container, install the correct versions of Node and Yarn:
 
+    nvm install --lts
     npm install -g yarn
+
+Then update the dependencies and test:
+
     yarn update-dependencies
     yarn
     yarn test