diff --git a/README.md b/README.md
index 613d6044..702b42ff 100755
--- a/README.md
+++ b/README.md
@@ -191,6 +191,8 @@ _Note: The following example is a quick start setup. For further details, see th
     ``` bash
     node util/monitor/monitor.js 3000 127.0.0.1 1235
       ```
+      
+    _Note: In case of "npm error cert_untrusted", just run command `npm config set registry="http://registry.npmjs.org/"` and try `npm install` again_
 
 5. Test setup with provided sample data.