# Deno v1.13.0 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.13.0
- **Released:** Aug 10, 2021
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.13.0/

## Executive Summary (TL;DR)
Deno v1.13.0. Source highlight: BREAKING(unstable): Rename Deno.WebSocketUpgrade::websocket to socket (#11542)

## Breaking Changes & Deprecations
- - BREAKING(unstable): Rename Deno.WebSocketUpgrade::websocket to socket (#11542)

## New Features
- feat: Add --unsafely-ignore-certificate-errors flag to disable SSL
- feat: add experimental WebSocketStream API (#10365)
- feat: FFI API replacing native plugins (#11152)
- feat: stabilize Deno.serveHttp() (#11544)
- feat: support AbortSignal in writeFile (#11568)
- feat: support client certificates for connectTls (#11598)

## Bug Fixes
- fix: support windows file specifiers with import maps (#11551)
- fix: Type `Deno.errors.*` as subclasses of `Error` (#10702)
- fix(doc): panic on invalid url (#11536)
- fix(extensions/fetch): Add Origin header to outgoing requests for fetch
- fix(extensions/websocket): allow any close code for server (#11614)
- fix(lsp): do not output to stderr before exiting the process (#11562)