diff --git a/axum/README.md b/axum/README.md
index 08487807..ab07aafc 100644
--- a/axum/README.md
+++ b/axum/README.md
@@ -8,6 +8,12 @@
 
 More information about this crate can be found in the [crate documentation][docs].
 
+## 🚨 The `main` branch has unpublished, breaking changes 🚨
+
+In preparation for `axum` 0.7 the `main` branch currently has unpublished,
+breaking changes. Please see the [v0.6.x](https://github.com/tokio-rs/axum/tree/v0.6.x)
+branch for the versions of `axum` published to crates.io.
+
 ## High level features
 
 - Route requests to handlers with a macro free API.