# Ghost v5.15.0 — Release & Upgrade Intelligence
- **Product:** Ghost (https://ghost.org)
- **Version:** v5.15.0
- **Released:** Sep 16, 2022
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/ghost/updates/v5.15.0/

## Executive Summary (TL;DR)
Ghost v5.15.0. Source highlight: ✨ Added support for .m4a format in audio cards - Naz

## New Features
- ✨ Added support for .m4a format in audio cards - Naz
- 🎨 Added number formatting to members import email - Simon Backx

## Bug Fixes
- 🐛 Fixed tag slug not auto-matching tag title when creating new tag - Kevin Ansfield
- 🐛 Fixed duplicate error columns in members import error CSV - Simon Backx
- 🐛 Fixed Hidden error in "Add tier" modal (#15361) - Hakim Razalan