diff --git a/tasks/main.yml b/tasks/main.yml
index f8df4bc..4e0ae13 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -34,6 +34,7 @@
     - { src: 'templates/sentry.conf.j2', dest: '{{ app_dir }}/sentry/sentry.conf.py' }
     - { src: 'templates/sentry.config.j2', dest: '{{ app_dir }}/sentry/config.yml' }
 
+# Note: run `docker-compose run --rm web export > backup.json` before upgrading
 # TODO: tag other sentry images aswell
 # can be ran multiple times to upgrade sentry
 - name: run sentry installer
diff --git a/vars/main.yml b/vars/main.yml
index f2d40e4..03867b1 100644
--- a/vars/main.yml
+++ b/vars/main.yml
@@ -5,7 +5,7 @@ app_name: 'sentry'
 app_dir: '/srv/docker/sentry'
 app_url: 'https://sentry.fudiggity.nl'
 app_repository: 'https://github.com/getsentry/onpremise.git'
-app_branch: '21.7.0'
+app_branch: '21.12.0'
 
 app_user: 'sonny'
 app_key: !vault |