diff --git a/README.md b/README.md
index e3cf380ee40eaa..d3cd0d297f7096 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,8 @@ npm install @material-ui/core
 yarn add @material-ui/core
 ```
 
+⚠️ All ongoing work has moved to v5. The support of v4 is limited to security fixes, third-party conflicts when possible (Chrome, React, etc.), and important bug fixes.
+
 **[Alpha channel v5](https://next.material-ui.com/)**
 
 ```sh