> ## 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.

# 3.5.10

> Canton 3.5.10 release notes.

# Release of Canton 3.5.10

Canton 3.5.10 has been released on July 23, 2026.

## Summary

This is a maintenance release that brings UX and hardening improvements.

## What’s New

### Minor Improvements

* Fixed an edge case that could cause deserialization of proto durations to fail
* Fixed an issue where topology transactions with max serial where not handled properly
* Ledger JSON API `/v2/state/active-contracts-page` is now available via POST; the GET variant that expects a request body is deprecated.
* Bump Flyway dependency to 12.0.2 to enable Postgres 18 support

## 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), PostgreSQL 18.4 (Debian 18.4-1.pgdg13+1) |