diff --git a/README.md b/README.md
index 2d8e6c9..1f84f10 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,8 @@ Then when you `cd` to your git repository, you can type
 ```bash
 git tidy
 ```
-and it'll do its thing!
+and it'll do its thing! Only the Python standard library is used, no additional
+packages are required.
 
 ## Background