# Upgrade Failure - Unable to verify certificate

**URL:** <https://meta.discourse.org/t/upgrade-failure-unable-to-verify-certificate/64058>\
**Category:** Product Support\
**Created:** [June 6, 2017, 8:24pm UTC](https://meta.discourse.org/t/upgrade-failure-unable-to-verify-certificate/64058 "2017-06-06T20:24:03Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![Rob\_Burkman](https://avatars.discourse-cdn.com/v4/letter/r/a5b964/32.png) [@Rob\_Burkman](https://meta.discourse.org/u/Rob_Burkman)\
**Post date:** [June 8, 2017, 7:07pm UTC](https://meta.discourse.org/t/upgrade-failure-unable-to-verify-certificate/64058/8 "2017-06-08T19:07:47Z")

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I was able to successfully upgrade the site after whitelisting `cdn.discourse.org` like this [post](https://meta.discourse.org/t/excon-openssl-problem-on-upgrade/64099/7).

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