diff --git a/README.md b/README.md
index 643b0eb..6629d71 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,9 @@
 
 Minimalist CLI email client, written in Rust.
 
+*The project is under active development. Do not use in production before the
+`v1.0.0` (see the [roadmap](https://github.com/soywod/himalaya/projects/2)).*
+
 ![image](https://user-images.githubusercontent.com/10437171/104848096-aee51000-58e3-11eb-8d99-bcfab5ca28ba.png)
 
 ## Table of contents