diff --git a/index.md b/index.md
index 7c5ec68..11b9ece 100644
--- a/index.md
+++ b/index.md
@@ -1,5 +1,7 @@
 ```{admonition} This site is a work in progress.
 :tags: important
+Currently there may be an issue with using Binder.
+
 You may report errors on [the issues page](https://github.com/dathere/100.dathere.com/issues) for this book's GitHub repository.
 ```