# Deno v1.5.4 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.5.4
- **Released:** Nov 23, 2020
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.5.4/

## Executive Summary (TL;DR)
Deno v1.5.4. Source highlight: feat(unstable): Add deno test --no-run (#8093)

## New Features
- feat(unstable): Add deno test --no-run (#8093)
- feat(unstable): Support --watch flag for bundle and fmt subcommands (#8276)
- feat(std/hash): Add HmacSha1 (#8418)
- feat(std/http): Check if cookie property is valid (#7189)
- feat(std/http): Validate cookie path value (#8457)
- feat(std/io): ReadableStream from AsyncIterator & WritableStream from Writer

## Improvements
- refactor: Improve Deno.version type declaration (#8391)

## Bug Fixes
- fix: Support "deno run --v8-flags=--help" without script (#8110)
- fix(tsc): Allow non-standard extensions on imports (#8464)
- fix(std/http): Fix error handling in the request iterator (#8365)
- fix(std/node) Fix event extendability (#8409)
- fix(std/node): Correct typings for global, globalThis, window (#8363)