# Bittorrent-Chain delivery layer v1.0.5 Release!

**URL:** <https://forum.bt.io/t/bittorrent-chain-delivery-layer-v1-0-5-release/169>\
**Category:** Announcements\
**Created:** [May 31, 2023, 6:37am UTC](https://forum.bt.io/t/bittorrent-chain-delivery-layer-v1-0-5-release/169 "2023-05-31T06:37:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**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:** [May 31, 2023, 6:37am UTC](https://forum.bt.io/t/bittorrent-chain-delivery-layer-v1-0-5-release/169/1 "2023-05-31T06:37:32Z")

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Dear developers,

The Bittorrent-Chain has released a new **version v1.0.5** to upgrade its delivery layer, the main modification includes: adding a rollback tool for delivery, and optimizing modification mechanism for chain parameters.

For release note, please refer to:

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

**Please note that:**

- **The delivery service will be upgraded to version v1.0.5.**
- This is a mandatory upgrade, all nodes need to be updated to avoid sync issues.

For upgrading, please follow the steps below,

1. Shutdown `deliveryd` /`rest-server progress`. If it is a validator node, shut down `bridge` as well;

2. download or update the code to the latest version:

3. Compile

4. **Check the version, and make sure it is 1.0.5.**

5. Initiate `deliveryd` / `rest-server` progress.

6. If it is a validator node, then initiates the `bridge` process.

**If there are any synchronization issues, please try the following steps:**

1. Stop `delivery` /`rest-server` processes.
2. Use the following rollback command to fix recently abnormal blocks:

```auto
$ deliveryd —-home ${deliveryd_home} rollback

```

3. Restart `deliveryd` / `rest-server` process.

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

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<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:** [May 31, 2023, 6:38am UTC](https://forum.bt.io/t/bittorrent-chain-delivery-layer-v1-0-5-release/169/2 "2023-05-31T06:38:28Z")

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