# CiviCRM 5.4.1
Released 25 Aug 2018
- **[Synopsis](#synopsis)**
- **[Bugs resolved](#bugs)**
- **[Credits](#credits)**
- **[Feedback](#feedback)**
## Synopsis
| *Does this version...?* | |
|:--------------------------------------------------------------- |:-------:|
| Fix security vulnerabilities? | no |
| Change the database schema? | no |
| Alter the API? | no |
| Require attention to configuration options? | no |
| Fix problems installing or upgrading to a previous version? | **yes** |
| Introduce features? | no |
| **Fix bugs?** | **yes** |
## Bugs resolved
- **(dev/core#316) Fix crash on Memcache systems when session key involves
whitespace ([12653](https://github.com/civicrm/civicrm-core/pull/12653))**
- **(dev/core#304) Fix crash in upgrading option-group data on some Drupal/Views
configurations ([12649](https://github.com/civicrm/civicrm-core/pull/12649))**
- **(dev/core#273) Fix SMS failure and handling of `do_not_sms`
([12654](https://github.com/civicrm/civicrm-core/pull/12654))**
- **Fix quirks in upgrader UI
([12675](https://github.com/civicrm/civicrm-core/pull/12675))**
## Credits
This release was developed by the following authors and reviewers:
Australian Greens - Seamus Lee; Chris Burgess; Christian Wach; Circle
Interactive - Dave Jenkins; CiviCRM - Coleman Watts, Tim Otten; CompuCorp - René
Olivo; MJW Consulting - Matthew Wire; Progressive Technology Project - Jamie
McClelland; Wikimedia Foundation - Eileen McNaughton
## Feedback
These release notes are edited by Tim Otten and Andie Hunt. If you'd like to
provide feedback on them, please login to https://chat.civicrm.org/civicrm and
contact `@agh1`.