# Meilisearch v1.21.0 — Release & Upgrade Intelligence
- **Product:** Meilisearch (https://meilisearch.com)
- **Version:** v1.21.0
- **Released:** Sep 15, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/meilisearch/updates/v1.21.0/

## Executive Summary (TL;DR)
Meilisearch v1.21.0. Source highlight: Introduce a new vector store backend for better performance, especially if using the binary quantization

## New Features
- Introduce a new vector store backend for better performance, especially if using the binary quantization
- Add Persian support (update charabia to v0.9.7) (#5848) @ManyTheFish

## Improvements
- Done in #5767

## Bug Fixes
- Observing the progress trace during indexing no longer removes parts of the trace (#5884) @irevoire
- Fix dumpless upgrade `decoding error` when upgrading with a `rest` embedder (#5886) @dureuill.
- In case you had encountered the issue, use the dumpless upgrade to v1.21 to fix it.