# Does app.yml persist between docker upgrades?
**URL:** https://meta.discourse.org/t/does-app-yml-persist-between-docker-upgrades/63950
**Category:** Support
**Created:** [June 5, 2017, 12:17pm UTC](https://meta.discourse.org/t/does-app-yml-persist-between-docker-upgrades/63950 "2017-06-05T12:17:28Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@jlippiner](https://meta.discourse.org/u/jlippiner)
#### Post date: [June 5, 2017, 12:17pm UTC](https://meta.discourse.org/t/does-app-yml-persist-between-docker-upgrades/63950/1 "2017-06-05T12:17:28Z")
Im working on a plugin and the instructions I received was to update the app.yml discourse file (the plugin overrides the email template).
The problem with this, I believe, is that while plugins persist between upgrades I don’t know / believe that the `app.yml` file does. Does anyone know if the `app.yml` file persists when you perform a version update? If it doesn’t, are we suppose to put the template override location in the `plugin.rb` file?
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### Author:  [@kraml](https://meta.discourse.org/u/kraml)
#### Post date: [June 5, 2017, 1:08pm UTC](https://meta.discourse.org/t/does-app-yml-persist-between-docker-upgrades/63950/2 "2017-06-05T13:08:30Z")
It persists. It is out of docker daemon or your container’s reach.
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### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [June 5, 2017, 1:58pm UTC](https://meta.discourse.org/t/does-app-yml-persist-between-docker-upgrades/63950/3 "2017-06-05T13:58:56Z")
The app.yml file is what determines how Discourse is configured. It wouldn’t make sense for Discourse to change it.
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### Author:  [@codinghorror](https://meta.discourse.org/u/codinghorror)
#### Post date: [June 5, 2017, 10:56pm UTC](https://meta.discourse.org/t/does-app-yml-persist-between-docker-upgrades/63950/4 "2017-06-05T22:56:28Z")