Atlassian Cloud throwing SSL error 'site uses a weak security configuration' in Chrome on El Capitan

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Platform Notice: Cloud Only - This article only applies to Atlassian products on the cloud platform.


Accessing your Atlassian Cloud instance in Chrome shows 'https' crossed out. Clicking for more information shows the error:

This site uses a weak security configuration (SHA-1 signatures), so your connection may not be private.



  • OS X El Capitan (earlier than beta 5)
  • Google Chrome (latest version)


The SSL certificate is valid, it appears to be a problem with Google Chrome and El Capitan:


Update OS X El Capitan to Beta 5. Technically we do not support El Capitan, however this version does not experience this particular error. To be completely safe we recommend using Yosemite.

Last modified on Mar 30, 2016

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