> ## Documentation Index
> Fetch the complete documentation index at: https://docs.canton.network/llms.txt
> Use this file to discover all available pages before exploring further.

# Release History

> Complete release history of Global Synchronizer software versions

This page provides a high-level overview of all Global Synchronizer software releases. For detailed notes per version, see [Splice release notes](/global-synchronizer/release-notes/splice).

## Splice 0.5.x (Canton 3.4.x)

The 0.5.x series runs on Canton protocol version 34 and was introduced through [CIP-0089](https://github.com/canton-foundation/cips/blob/main/cip-0089/cip-0089.md), which required a synchronizer migration with downtime.

| Version | Key changes                                                                                             |
| ------- | ------------------------------------------------------------------------------------------------------- |
| 0.5.9   | Minting delegation (CIP-0073), development fund coupon management                                       |
| 0.5.8   | Fix topology transaction performance regression from 0.5.7                                              |
| 0.5.7   | Development Fund (CIP-0082) Daml changes, async logging. **Skip this version** — performance regression |
| 0.5.6   | Sequencer performance improvements                                                                      |
| 0.5.5   | API authorization tightening, custom party names for user onboarding                                    |
| 0.5.4   | Fix pruning bug, fix event processing performance regression                                            |
| 0.5.3   | Sequencer retry improvements, scan aggregate fixes. **Skip 0.5.2** — accidental default pruning         |
| 0.5.1   | Fix participant startup issue under high traffic                                                        |
| 0.5.0   | Canton 3.4 upgrade (synchronizer migration required), mediator pruning, HTTP proxy support              |

## Splice 0.4.x (Canton 3.3.x)

The 0.4.x series runs on Canton protocol version 33. It introduced the Token Standard ([CIP-0056](https://github.com/canton-foundation/cips/blob/main/cip-0056/cip-0056.md)), holding UTXO management, and the featured app activity markers API.

| Version            | Key changes                                                                                        |
| ------------------ | -------------------------------------------------------------------------------------------------- |
| 0.4.25             | Fix participant startup issue (same as 0.5.1). **Skip 0.4.24**                                     |
| 0.4.23             | Token standard wallet utilities (`splice-util-token-standard-wallet.dar`), holding UTXO management |
| 0.4.22 and earlier | Various fixes and features leading up to Token Standard launch                                     |

<Note>
  Migration dumps from 0.4.x are not compatible with 0.5.8 and later. If you are still on 0.4.x, plan your upgrade path carefully and deploy without migration mode enabled.
</Note>

## Canton version history

Canton releases follow their own versioning. Each Splice series is built against a specific Canton minor version.

| Canton series | Protocol version | Splice series |
| ------------- | ---------------- | ------------- |
| 3.4.x         | 34               | 0.5.x         |
| 3.3.x         | 33               | 0.4.x         |

Individual Canton release notes are available in the [Canton release notes directory](https://github.com/digital-asset/canton/tree/main/release-notes).

## Download links

Release bundles are published on the [Splice GitHub releases page](https://github.com/digital-asset/decentralized-canton-sync/releases). Each release includes:

* `{version}_splice-node.tar.gz` — the Splice node bundle containing all components
* Docker images published to the container registry
* Helm charts for Kubernetes deployments