Update APPs in Rancher

Hi I would like to know how I can update the versions of apps deployed in Rancher.
Currently I have deployed Prometheus and Grafana but I see that Grafana is using the catalog version of 0.0.31 which is running on Grafana 5.0.0 version. This version of Grafana docent allow me to add the datasources like Google Stackdriver and Azure Monitoring and this is really holding me to go live.

Is there a way to update these versions of apps after install or any other way to do a custom install the app.

Any quick response will be greatly appreciated please.