You can now require encrypted connections when creating a Memetria for Redis add-on on Heroku:

heroku addons:create memetria-redis:minidev -- --tls-only

Plaintext connections are disabled from the first boot, and MEMETRIA_REDIS_URL contains a rediss:// URL. Your client must support TLS.

For repeatable provisioning, including Review Apps, set "tls-only": "true" in the add-on’s options in app.json.