# Can custom CSS cause an error when trying to upgrade?

**URL:** <https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867>\
**Category:** Self-hosting\
**Tags:** multisite\
**Created:** [March 6, 2019, 2:39pm UTC](https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867 "2019-03-06T14:39:22Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![david](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/david/32/157490_2.png) [@david](https://meta.discourse.org/u/david)\
**Post date:** [March 7, 2019, 2:52pm UTC](https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867/8 "2019-03-07T14:52:02Z")

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That should be fine, the fix I made was in the Discourse app, not the docker image. (The latest app version gets pulled in automatically). Are you running tests-passed, or beta/stable?

Let me know if it works!

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_[View the full topic](https://meta.discourse.org/t/can-custom-css-cause-an-error-when-trying-to-upgrade/110867)._