# Bittorrent-Chain delivery layer v1.0.3 and bttc layer v1.0.5 Release!

**URL:** <https://forum.bt.io/t/bittorrent-chain-delivery-layer-v1-0-3-and-bttc-layer-v1-0-5-release/124>\
**Category:** Announcements\
**Created:** [February 15, 2023, 8:06am UTC](https://forum.bt.io/t/bittorrent-chain-delivery-layer-v1-0-3-and-bttc-layer-v1-0-5-release/124 "2023-02-15T08:06:41Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![murphy.zhang](https://avatars.discourse-cdn.com/v4/letter/m/e495f1/32.png) [@murphy.zhang](https://forum.bt.io/u/murphy.zhang)\
**Post date:** [February 15, 2023, 8:06am UTC](https://forum.bt.io/t/bittorrent-chain-delivery-layer-v1-0-3-and-bttc-layer-v1-0-5-release/124/1 "2023-02-15T08:06:41Z")

</div>

Dear developers,

The Bittorrent-Chain has released a new version v1.0.3 to upgrade its delivery layer, the main modification includes: supporting go version 1.17, optimization of proposer rotation strategy to increase stability of the chain, optimization of checkpoint timer to increase the accuracy of the timer.

And also, the Bittorrent-Chain has released a new version v1.0.5 to upgrade its bttc layer, the main modification includes: supporting go version 1.17,optimization of rules to terminate bttc service.

For release note, please refer to:

delivery : [Release v1.0.3 · bttcprotocol/delivery · GitHub](https://github.com/bttcprotocol/delivery/releases/tag/v1.0.3)

bttc：[Release v1.0.5 · bttcprotocol/bttc · GitHub](https://github.com/bttcprotocol/bttc/releases/tag/v1.0.5)

Please upgrade your node, and inform us when you finish the work so that we can trace the status and make sure your node works well.

Thanks!

Bittorrent-Chain Developer Community