SSL with mosquitto

Just setup Hass.io due to my last hassbian setup doing down after some power outages.

In hassio i have add ons mosquitto mqtt and letsencrypt installed

this is the config for MQTT

{
  "plain": true,
  "plain_websockets": false,
  "ssl": false,
  "ssl_websockets": false,
  "anonymous": true,
  "logins": [],
  "customize": {
"active": false,
"folder": "mosquitto"
  },
  "certfile": "fullchain.pem",
  "keyfile": "privkey.pem"
}

Because im using lets encrypt do i need to change ssl to true? how about websockets?