# Invalid TLS certificate - Event Subscription

**URL:** <https://devforum.zoom.us/t/invalid-tls-certificate-event-subscription/89793>\
**Category:** API and Webhooks\
**Tags:** webhooks, api\
**Created:** [June 7, 2023, 10:16pm UTC](https://devforum.zoom.us/t/invalid-tls-certificate-event-subscription/89793 "2023-06-07T22:16:24Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![dennis\_nz](https://avatars.discourse-cdn.com/v4/letter/d/94ad74/32.png) [@dennis\_nz](https://devforum.zoom.us/u/dennis_nz)\
**Post date:** [June 7, 2023, 10:16pm UTC](https://devforum.zoom.us/t/invalid-tls-certificate-event-subscription/89793/1 "2023-06-07T22:16:24Z")

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Had a Event Subscription setup previously and was working great then about 2 days ago it stopped working. When trying re-validate the URL it comes up with

‘Invalid TLS certificate’

Have checked the TSL/SSL certificate with SSL Labs and also Chrome and Edge all working fine on the endpoint.

Certificates are provided by Cloudflare with Google Trust Services for this endpoint.

Reached out to support who advised to post in the forum (how helpful)

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**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [June 9, 2023, 5:21pm UTC](https://devforum.zoom.us/t/invalid-tls-certificate-event-subscription/89793/2 "2023-06-09T17:21:44Z")

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Hi @dennis_nz  
Thanks for reaching out to the Zoom Developer Forum and welcome to our community, I am happy to help here!  
Can you please confirm if you have been able to re validate your endpoint URL or are you still getting this ‘Invalid TLS certificate’ error?

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**Author:** ![dennis\_nz](https://avatars.discourse-cdn.com/v4/letter/d/94ad74/32.png) [@dennis\_nz](https://devforum.zoom.us/u/dennis_nz)\
**Post date:** [June 10, 2023, 7:40am UTC](https://devforum.zoom.us/t/invalid-tls-certificate-event-subscription/89793/3 "2023-06-10T07:40:30Z")

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Still getting the same error

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**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [June 12, 2023, 2:29pm UTC](https://devforum.zoom.us/t/invalid-tls-certificate-event-subscription/89793/4 "2023-06-12T14:29:26Z")

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Hi @dennis_nz  
I will follow up with a private message.  
Please reply there  
Cheers,  
Elisa

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**Author:** ![dennis\_nz](https://avatars.discourse-cdn.com/v4/letter/d/94ad74/32.png) [@dennis\_nz](https://devforum.zoom.us/u/dennis_nz)\
**Post date:** [July 16, 2023, 6:22am UTC](https://devforum.zoom.us/t/invalid-tls-certificate-event-subscription/89793/5 "2023-07-16T06:22:57Z")

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Thanks @elisa.zoom for your help

Zoom has pushed an update and Google SSL Certs are now working again for Webhooks.

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [July 18, 2024, 9:59pm UTC](https://devforum.zoom.us/t/invalid-tls-certificate-event-subscription/89793/6 "2024-07-18T21:59:03Z")

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Closed on July 18, 2024, 9:59pm UTC

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