# Deno v1.15.3 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.15.3
- **Released:** Oct 25, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.15.3/

## Executive Summary (TL;DR)
Deno v1.15.3. Source highlight: feat(serde_v8): StringOrBuffer (#12503)

## New Features
- feat(serde_v8): StringOrBuffer (#12503)
- feat(serde_v8): allow all values to deserialize to unit type (#12504)

## Bug Fixes
- fix(cli/dts): update std links for deprecations (#12496)
- fix(cli/tests): flaky Deno.watchFs() tests (#12485)
- fix(core): avoid op_state.borrow_mut() for OpsTracker (#12525)
- fix(core/bindings): use is_instance_of_error() instead of is_native_error()
- fix(ext/net): fix TLS bugs and add 'op_tls_handshake' (#12501)
- fix(ext/websocket): prevent 'closed normally' panic (#12437)