Upgrading from v0.21.0 to v0.22.0 is straightforward, and only requires updating your dittofeed image tag.
If you are on a version of dittofeed prior to v0.20.0, you will need to upgrade to v0.20.0 prior to upgrading to v0.22.0. See the Upgrading from v0.19.0 to v0.20.0 guide for more information on upgrading to v0.20.0.

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Update Your docker-compose.lite.yaml File

Update the image tag in your docker-compose.lite.yaml file to v0.22.0: 
services:
  lite:
    image: dittofeed/dittofeed-lite:${IMAGE_TAG:-v0.22.0}

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Update Your Helm Chart

Update the tag in your values.yaml file to v0.22.0:
values.yaml
image:
  tag: ${IMAGE_TAG:-v0.22.0}
Upgrade the dittofeed chart: 
helm upgrade --install dittofeed ./dittofeed/helm-charts/dittofeed