diff --git a/FAQ.md b/FAQ.md
index 219e366262..d479274914 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -625,6 +625,8 @@ or by installing the GitHub version of the app (as an update) and enabling insec
 *... Invalid security certificate (Can't verify identity of server) ...*<br />
 *... Chain validation failed ... timestamp check failed ... Certificate expired at ...*<br />
 
+**Goneo**: please [see here](https://www.goneo.de/hilfe/email/zertifikatswarnung).
+
 This can be caused by using an incorrect host name, so first double-check the host name in the advanced identity/account settings (tap *Manual setup and account options*).
 Please see the documentation of the email provider about the right host name.
 Sometimes the right host name is in the error message.
diff --git a/index.html b/index.html
index 96b3d66755..63e580d227 100644
--- a/index.html
+++ b/index.html
@@ -563,6 +563,7 @@ for the version of FairEmail distributed in the Play Store.
 Therefore, this issue can only be resolved by your email provider,
 or by installing the GitHub version of the app (as an update) and enabling insecure connections in the account/identity settings.** -->
 <p><em>… Untrusted … not in certificate …</em><br /> <em>… Untrusted … Unacceptable certificate …</em><br /> <em>… Invalid security certificate (Can’t verify identity of server) …</em><br /> <em>… Chain validation failed … timestamp check failed … Certificate expired at …</em><br /></p>
+<p><strong>Goneo</strong>: please <a href="https://www.goneo.de/hilfe/email/zertifikatswarnung">see here</a>.</p>
 <p>This can be caused by using an incorrect host name, so first double-check the host name in the advanced identity/account settings (tap <em>Manual setup and account options</em>). Please see the documentation of the email provider about the right host name. Sometimes the right host name is in the error message.</p>
 <p><del>Another possible cause is <a href="https://github.com/appmattus/certificatetransparency">Certificate transparency</a> failing, so try disabling it in the connection settings tab page.</del></p>
 <p>You should try to fix this by contacting your provider or by getting a valid security certificate because invalid security certificates are insecure and allow <a href="https://en.wikipedia.org/wiki/Man-in-the-middle_attack">man-in-the-middle attacks</a>. If money is an obstacle, you can get free security certificates from <a href="https://letsencrypt.org">Let’s Encrypt</a>.</p>