diff --git a/examples/gatsby/README.md b/examples/gatsby/README.md
index 520bf9396fdea5..66dcd3982dc879 100644
--- a/examples/gatsby/README.md
+++ b/examples/gatsby/README.md
@@ -19,3 +19,9 @@ npm run develop
 ## The idea behind the example
 
 [Gatsby](https://github.com/gatsbyjs/gatsby) is a static site generator for React.
+
+## `withRoot` usage
+
+We are using the `withRoot` higher-order component to accommodate Material-UI's styling solution with Gatsby.
+
+⚠️ You should only use a single `withRoot` for rendering one page.