Update README.md

@@ -13,10 +13,10 @@ Thingsboard documentation is hosted on [thingsboard.io](https://thingsboard.io/d
 ## Sample Dashboards
 
 [**Smart energy monitoring**](https://demo.thingsboard.io/demo?dashboardId=e8e409c0-f2b5-11e6-a6ee-bb0136cc33d0&source=github)
-[![Smart energy monitoring demo](https://cloud.githubusercontent.com/assets/8308069/22933146/438b5ac8-f2d3-11e6-9f68-eb14b967ecd8.png "Smart energy monitoring demo")](https://demo.thingsboard.io/demo?dashboardId=e8e409c0-f2b5-11e6-a6ee-bb0136cc33d0&source=github)
+[![Smart energy monitoring demo](https://cloud.githubusercontent.com/assets/8308069/23790111/62c8a61e-0586-11e7-84eb-51febc54ec09.png "Smart energy monitoring demo")](https://demo.thingsboard.io/demo?dashboardId=e8e409c0-f2b5-11e6-a6ee-bb0136cc33d0&source=github)
 
 [**Smart bus tracking**](https://demo.thingsboard.io/demo?dashboardId=3d0bf910-ee09-11e6-b619-bb0136cc33d0&source=github)
-[![Smart bus tracking demo](https://cloud.githubusercontent.com/assets/8308069/22839004/424b0308-efd0-11e6-8e90-7c7ca002495c.png "Smart bus tracking demo")](https://demo.thingsboard.io/demo?dashboardId=3d0bf910-ee09-11e6-b619-bb0136cc33d0&source=github)
+[![Smart bus tracking demo](https://cloud.githubusercontent.com/assets/8308069/23790110/62c6ecde-0586-11e7-8249-19eafd5bf8cc.png "Smart bus tracking demo")](https://demo.thingsboard.io/demo?dashboardId=3d0bf910-ee09-11e6-b619-bb0136cc33d0&source=github)
 
 ## Getting Started