# invalid https cert when using the GUI
**URL:** https://forum.syncthing.net/t/invalid-https-cert-when-using-the-gui/18048
**Category:** Support
**Created:** [February 16, 2022, 10:51am UTC](https://forum.syncthing.net/t/invalid-https-cert-when-using-the-gui/18048 "2022-02-16T10:51:24Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ratherNot](https://forum.syncthing.net/u/ratherNot)
#### Post date: [February 16, 2022, 10:51am UTC](https://forum.syncthing.net/t/invalid-https-cert-when-using-the-gui/18048/1 "2022-02-16T10:51:24Z")
Hey guys,
Syncthing noob (and noob in general) here, so please bare with me.
[this post](https://forum.syncthing.net/t/ssl-certificate-setup/2901/2) describes my problem quite well.
I want to connect to the GUI via https. My browser says that my certificate is not valid. I found the `https-cert.pem` and `https-key.pem` in `~/.config/syncthing` but I’m not quite sure what to do now.
Can you guys help me out?
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### Author:  [@tomasz86](https://forum.syncthing.net/u/tomasz86)
#### Post date: [February 16, 2022, 11:52am UTC](https://forum.syncthing.net/t/invalid-https-cert-when-using-the-gui/18048/2 "2022-02-16T11:52:03Z")
This is the expected behaviour, because browsers don’t accept self-signed certificates as those used by Syncthing.
Do you something similar to the following?
If yes, you can click “Advanced” and proceed to open the Web GUI.
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### Author:  [@system](https://forum.syncthing.net/u/system)
#### Post date: [March 18, 2022, 11:52am UTC](https://forum.syncthing.net/t/invalid-https-cert-when-using-the-gui/18048/3 "2022-03-18T11:52:37Z")
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