diff --git a/README.md b/README.md
index 6b40b7e..a5ef52d 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,9 @@ The contents of this repository are licensed under the [MIT license](LICENSE), s
 
 - For detailed infos for each lab, check out the labs' README files.
 - To get a lab environment up and running, `cd` into that directory and run `docker-compose up`.
-- Unless otherwise notedf, each lab runs an [alice-lg](https://github.com/alice-lg/alice-lg) looking class on [http://localhost:7340](http://localhost:7340).
+- When you're done with a lab, run `docker-compose down` to clean up.
+  - This is especially important when switching between labs, as they use overlapping address ranges.
+- Unless otherwise noted, each lab runs an [alice-lg](https://github.com/alice-lg/alice-lg) looking class on [http://localhost:7340](http://localhost:7340).
 
 
 ## Labs