diff --git a/examples/with-universal-configuration/README.md b/examples/with-universal-configuration/README.md
index 2331fc2e5982..9b533de55634 100644
--- a/examples/with-universal-configuration/README.md
+++ b/examples/with-universal-configuration/README.md
@@ -26,3 +26,7 @@ now
 ## The idea behind the example
 
 This example show how to set custom environment variables for your application based on NODE_ENV using [transform-define](https://github.com/FormidableLabs/babel-plugin-transform-define).
+
+## Caveats
+
+Because a babel plugin is used the output is cached in `node_modules/.cache` by `babel-loader`. When modifying the configuration you will have to manually clear this cache to make changes visible.