# Deno v1.37.2 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.37.2
- **Released:** Oct 13, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.37.2/

## Executive Summary (TL;DR)
Deno v1.37.2. Source highlight: feat(ext/web): cancel support for TransformStream (#20815)

## New Features
- feat(ext/web): cancel support for TransformStream (#20815)
- feat(lsp): jupyter notebook analysis (#20719)
- feat(lsp): send "deno/didChangeDenoConfiguration" notifications (#20827)
- feat(unstable): add Deno.jupyter.display API (#20819)
- feat(unstable): add unix domain socket support to Deno.serve (#20759)
- feat(unstable): Await return from `Jupyter.display` (#20807)

## Improvements
- perf(ext/web): optimize DOMException (#20715)
- perf(ext/web): optimize structuredClone without transferables (#20730)
- perf(lsp): optimize formatting minified files (#20829)
- perf(node): use faster utf8 byte length in Buffer#from (#20746)

## Bug Fixes
- fix(bench): use total time when measuring wavg (#20862)
- fix(cli): Support using both `--watch` and `--inspect` at the same time
- fix(cli): panic with __runtime_js_sources (#20704)
- fix(ext/ffi): use anybuffer for op_ffi_ptr_of (#20820)
- fix(ext/formdata): support multiple headers in FormData (#20801)
- fix(ext/http): Deno.Server should not be thenable (#20723)