# Repository not signed **URL:** \ **Category:** Software\ **Created:** [November 3, 2017, 5:18pm UTC](https://forum.lulzbot.com/t/repository-not-signed/5306 "2017-11-03T17:18:11Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![bedhead911](https://avatars.discourse-cdn.com/v4/letter/b/ecd19e/32.png) [@bedhead911](https://forum.lulzbot.com/u/bedhead911)\ **Post date:** [November 3, 2017, 5:18pm UTC](https://forum.lulzbot.com/t/repository-not-signed/5306/1 "2017-11-03T17:18:11Z")
I’m using ubuntu and have Lulzbot edition of Cura installed on my computer using aleph objects repository. Every time I do an apt-get update I keep getting these messages. W: The repository ‘[http://download.alephobjects.com/ao/aodeb](http://download.alephobjects.com/ao/aodeb) stretch Release’ is not signed. N: Data from such a repository can’t be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. Cura is working fine, but should I be concerned about these messages? ---
**Author:** ![Orias](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/orias/32/3_2.png) [@Orias](https://forum.lulzbot.com/u/Orias)\ **Post date:** [November 3, 2017, 6:17pm UTC](https://forum.lulzbot.com/t/repository-not-signed/5306/2 "2017-11-03T18:17:27Z")
Try adding the key again. Follow the second step in the guide [here](https://www.lulzbot.com/learn/tutorials/cura-lulzbot-edition-installation-ubuntu). It’s working for others on Ubuntu, so it should be working for you. Let me know how it goes! ---
**Author:** ![bedhead911](https://avatars.discourse-cdn.com/v4/letter/b/ecd19e/32.png) [@bedhead911](https://forum.lulzbot.com/u/bedhead911)\ **Post date:** [November 4, 2017, 7:28am UTC](https://forum.lulzbot.com/t/repository-not-signed/5306/3 "2017-11-04T07:28:02Z")
Hey thanks for the help it works fine now.