This script will read the version of the Helm server you are running. It will then download a new version of helm if needed and run your command with new helm. I named it h since most everyone appears to alias helm to h anyway.
Download the file to somewhere in your path. Any time you would call helm ..., call h ... instead.
curl -OL https://raw.githubusercontent.com/jakepearson/h/master/h && chmod +x h