# Datomic Cloud 441-8505 Critical Update

**URL:** <https://forum.datomic.com/t/datomic-cloud-441-8505-critical-update/645>\
**Category:** Announcements\
**Created:** [October 12, 2018, 12:42am UTC](https://forum.datomic.com/t/datomic-cloud-441-8505-critical-update/645 "2018-10-12T00:42:16Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![jaret](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/jaret/32/45_2.png) [@jaret](https://forum.datomic.com/u/jaret)\
**Post date:** [October 12, 2018, 12:42am UTC](https://forum.datomic.com/t/datomic-cloud-441-8505-critical-update/645/1 "2018-10-12T00:42:16Z")

</div>

Datomic Cloud release 441-8505 includes critical updates. All users of the Production Topology and Query Groups should [upgrade](https://docs.datomic.com/cloud/operation/upgrading.html) to 441-8505 immediately. The Solo Topology is not affected.

- Critical: fixes a problem that can cause portions of the log to be  
become inaccessible. Please update as soon as possible.