> ## 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.

# 3.5.3

> Canton 3.5.3 release notes.

# Release of Canton 3.5.3

Canton 3.5.3 has been released on June 03, 2026.

## Summary

This is a maintenance release that fixes an issue around mediator restart and LSU.

## Bugfixes

### Mediator cannot reconnect to sequencer after processing LSU sequencing test message

During LSU, after processing a sequencing test message, a mediator cannot reconnect to the sequencer.
The connection issue resolves itself when the upgrade time is reached and traffic is initialized on the sequencer.

## Compatibility

The following Canton protocol versions are supported:

| Dependency               | Version |
| ------------------------ | ------- |
| Canton protocol versions | 34, 35  |

Canton has been tested against the following versions of its dependencies:

| Dependency   | Version                                                                                                                                                                                                   |
| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Java Runtime | OpenJDK 64-Bit Server VM (build 21.0.12+2-nixos, mixed mode, sharing)                                                                                                                                     |
| Postgres     | Recommended: PostgreSQL 17.10 (Debian 17.10-1.pgdg13+1) – Also tested: PostgreSQL 14.23 (Debian 14.23-1.pgdg13+1), PostgreSQL 15.18 (Debian 15.18-1.pgdg13+1), PostgreSQL 16.14 (Debian 16.14-1.pgdg13+1) |