# OPCUA certificate expired

**URL:** <https://forum.inductiveautomation.com/t/opcua-certificate-expired/40663>\
**Category:** Ignition\
**Created:** [November 14, 2020, 2:58pm UTC](https://forum.inductiveautomation.com/t/opcua-certificate-expired/40663 "2020-11-14T14:58:37Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [November 14, 2020, 3:22pm UTC](https://forum.inductiveautomation.com/t/opcua-certificate-expired/40663/2 "2020-11-14T15:22:35Z")

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Stop the Ignition gateway then delete these files:

- `$IGNITION_INSTALL/data/opcua/client/security/certificates.pfx`
- `$IGNITION_INSTALL/data/opcua/server/security/certificates.pfx`

Start the Ignition gateway and your certificates should be valid and your default OPC UA connection should be working.

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_[View the full topic](https://forum.inductiveautomation.com/t/opcua-certificate-expired/40663)._