diff --git a/docs/USING_ADVANCED.md b/docs/USING_ADVANCED.md
index 359942ba62..6d50a986a6 100644
--- a/docs/USING_ADVANCED.md
+++ b/docs/USING_ADVANCED.md
@@ -85,6 +85,9 @@ Marked can be run in a [worker thread](https://nodejs.org/api/worker_threads.htm
 
 ### Node Worker Thread
 
+> 🚨 Node Worker Threads are [experimental](https://nodejs.org/api/worker_threads.html#worker_threads_worker_threads) 🚨
+> This implementation may change.
+
 ```js
 // markedWorker.js