diff --git a/README.md b/README.md
index 3a43e519b3..10b861c91c 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ Starting with 1.6.4, Arduino allows installation of third-party platform package
 - Start Arduino and open Perferences window.
 - Enter ```http://arduino.esp8266.com/package_esp8266com_index.json``` into *Additional Board Manager URLs* field. You can add multiple URLs, separating them with commas.
 - Open Boards Manager from Tools > Board menu and install *esp8266* platform (and don't forget to select your ESP8266 board from Tools > Board menu after installation).
+- There is a development branch also, but note that this version is often broken for various reasons http://arduino.esp8266.com/staging/package_esp8266com_index.json
 
 ### [Change log](hardware/esp8266com/esp8266/changes.md)