Dear All,
Below error message was occurred, on Ubuntu 24.04, while:
$ sudo apt update
ERROR:7 http://apt.insync.io/ubuntu noble Inrelease
The following signatures were invalid: EXPKEYSIG …
I believe there was a similar issue near Aug, 2025.
Seems like this kind of issue should be regularly check by Insync team. Hope to be solved soon.
Just for more information, I add below information:
$ insync-headless version
3.2.7.10758
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 24.04.3 LTS
Release: 24.04
Codename: noble
mia
December 11, 2025, 9:13am
2
Our engineers have already been alerted, thank you for your help in reporting this!
Dear mia,
Always thank you for your support. The Insync solution could be more trusted with your consideration and keen communication.
Just regarding the repository issue, I’d like to request that the engineering team perform regular checks to prevent recurring problems. I look forward to continued collaboration with Insync.
mia
December 12, 2025, 4:07am
4
Hi @midotter ,
Thank you for your kind words and continued trust in Insync! Rest assured that our keys are not expired.
Could you send the output of the command below:
gpg --show-keys --with-fingerprint /etc/apt/trusted.gpg.d/insynchq.gpg
If there’s a no such file or directory error, please run this and let me know how it goes:
curl -L https://apt.insync.io/insynchq.gpg 2>/dev/null | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/insynchq.gpg 1>/dev/null
Dear @mia ,
First of all, thank you — the issue has been resolved.
For the sake of reference in the forum, I’d like to share the following:
Based on the output of “gpg --show-keys”, it appears that my existing key had expired on 2024-09-08. I did go through an unusual sequence of installing insync → uninstalling it → installing insync-headless, but I’m still not sure how I ended up with an already-expired key in the first place.
Thanks again for your help!
1 Like
mia
December 12, 2025, 10:23am
6
Thank you so much for the update, @midotter ! We appreciate you for sharing more details on the issue.
If you need anything else, just let me know!
Hi @mia , I am trying to install Insync on Ubuntu 24.04.3 LTS Noble, and this issue is back again.
Can you please provide some assistance?
mia
January 7, 2026, 7:03am
8
Hi @spinal0595 ,
Could you please follow the instructions below, in case you haven’t tried?
Run this command:
gpg --show-keys --with-fingerprint /etc/apt/trusted.gpg.d/insynchq.gpg
If there’s a no such file or directory error, please run this and let me know how it goes:
curl -L https://apt.insync.io/insynchq.gpg 2>/dev/null | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/insynchq.gpg 1>/dev/null
Thank you!
@mia Finally got around to trying it.
Here is the result:
1 Like
mia
January 21, 2026, 6:40am
10
@spinal0595 Apologies for the late revert! I’ve forwarded this to our engineers for advise.
Kurt_Ko
January 21, 2026, 6:30pm
11
Hi @spinal0595
What’s the output of the following command?
curl -L https://apt.insync.io/insynchq.gpg
Thanks!
1 Like