diff --git a/PREREQUISITES.md b/PREREQUISITES.md
index 4c35730c0a..1cb6fdaf07 100644
--- a/PREREQUISITES.md
+++ b/PREREQUISITES.md
@@ -6,6 +6,9 @@ The [Angular 2](https://angular.io/) based application development framework req
 - [Download and install Activiti](https://www.alfresco.com/products/bpm/alfresco-activiti/trial)
 - [Node.js](https://nodejs.org/en/) JavaScript runtime.
 - [npm](https://www.npmjs.com/) package manager for JavaScript.
+- (If you use ECM and BPM togheter) Make sure your user has the same username and password in both system
+
+*Note: Default username for activiti is "admin@app.activiti.com" and "admin" for Alfresco, and also the default password are different. Change them to be equal.
 
 **Verify that you are running at least node `v5.x.x` and npm `3.x.x`**
 by running `node -v` and `npm -v` in a terminal/console window.