There are updates fairly regularly. Here's the instructions to update everything fairly easily. It is recommended to upgrade your server when you update the skill.
To upgrade the cli, type this in your terminal:
npm upgrade -g lexigram-cli
All it takes when there is a new version to upgrade the skill is this:
lexigram deploy kanzi
lexigram deploy koko
Just delete the existing app from your Heroku Dashboard, and create another with the button below with the same name you gave earlier.
Log into AWS, and just upload the new zip you created with:
lexigram generate-function kazni
lexigram generate-function koko