diff --git a/README.md b/README.md
index a821b8e..2e27286 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,9 @@ Ntopng alerts are displayed in Globe.gl
 npm install
 ```
 
+### Setup
+> :warning: Ntopng webhook **must** point on ```http://<ADRESS>:3100/ws```
+
 ### Start Server
 ``` sh
 npm start