The following software will be updated on Open Source, downtime should be minimal.

software : Bamboo
current : 6.2.1
version : 6.2.2
release notes : https://confluence.atlassian.com/display/BAMBOO/Bamboo+6.2+Release+Notes

software : JIRA
current : 7.5.0
version : 7.5.2
release notes : https://confluence.atlassian.com/display/JIRASOFTWARE/JIRA+Software+7.5.x+release+notes

software : Confluence
current : 6.4.0
version : 6.5.0
release notes : http://confluence.atlassian.com/display/DOC/Confluence+6.5.0+Release+Notes

software : BitBucket
current : 5.3.1
version : 5.5.0
release notes : http://confluence.atlassian.com/display/BitbucketServer/Bitbucket+Server+5.5+release+notes