diff --git a/README.md b/README.md
index 893788f..11c9a03 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@
 
 # GreptimeDB Go Ingester
 
+NOTE: the project is still in its early stages.
+
 Provide API for using GreptimeDB client in Go.
 
 ## Installation