# FAILED: pip3 install email\_validator\>=1.0.0 MIAB upgrade failure

**URL:** <https://discourse.mailinabox.email/t/failed-pip3-install-email-validator-1-0-0-miab-upgrade-failure/1725>\
**Category:** Maintenance\
**Created:** [December 12, 2016, 7:28pm UTC](https://discourse.mailinabox.email/t/failed-pip3-install-email-validator-1-0-0-miab-upgrade-failure/1725 "2016-12-12T19:28:41Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![v60fan](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/v60fan/32/277_2.png) [@v60fan](https://discourse.mailinabox.email/u/v60fan)\
**Post date:** [December 12, 2016, 7:55pm UTC](https://discourse.mailinabox.email/t/failed-pip3-install-email-validator-1-0-0-miab-upgrade-failure/1725/2 "2016-12-12T19:55:00Z")

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I think this link has the solution

> [@OpenSSL error when running 'sudo mailinabox'](https://discourse.mailinabox.email/t/openssl-error-when-running-sudo-mailinabox/1659/5):
>
> Something strange happened. I also had the same problem after, I think, some Python packages got updated. The problem seems to be some incompatibility between the Python packages pyOpenSSL and cryptography. I was able to solve this by removing pyOpenSSL and cryptography completely and then re-installing pyOpenSSL: sudo apt-get -y purge python3-openssl sudo rm -rf /usr/local/lib/python3.4/dist-packages/{OpenSSL,cryptography}\* sudo pip3 install pyOpenSSL Then running the Mail-in-a-Box setup aga…

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