diff --git a/README.md b/README.md
index f0cb4d840..aec309183 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,8 @@
 
 # Cluster API Operator
 
+:warning: **The project is in development**: Be very careful using it!
+
 Home for Cluster API Operator, a subproject of sig-cluster-lifecycle
 
 ## What is Cluster API Operator?