# Bun bun-v1.4.0 — Bun v1.4

- Product: Bun (https://whatsnew.fyi/product/bun)
- Vendor: Oven
- Date: 2026-08-20
- Version: bun-v1.4.0
- Original notes: https://github.com/oven-sh/bun/releases/tag/bun-v1.4.0
- Permalink: https://whatsnew.fyi/product/bun/releases/bun-v1.4.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

---

To install Bun v1.4
```bash
curl -fsSL https://bun.com/install | bash
#### or you can use npm
#### npm install -g bun
```

Windows:
```bash
powershell -c "irm bun.com/install.ps1|iex"
```

To upgrade to Bun v1.4.0:
```bash
bun upgrade
```

Read the [blog post](https://bun.com/1.4):
<a href="https://bun.com/1.4">
<img width="1672" height="941" alt="image (1)" src="https://github.com/user-attachments/assets/e8b3c370-7725-47c0-99cd-76faa8c869a3" />
</a>



###### Thank you

Bun is free, open source, and MIT-licensed. We receive a lot of contributions from the community, and we'd like to thank everyone who fixed a bug or contributed since Bun v1.3.

- [@190n](https://github.com/190n)
- [@alanstott](https://github.com/alanstott)
- [@alii](https://github.com/alii)
- [@alinalihassan](https://github.com/alinalihassan)
- [@amdad121](https://github.com/amdad121)
- [@ant-kurt](https://github.com/ant-kurt)
- [@anthonybaldwin](https://github.com/anthonybaldwin)
- [@avarayr](https://github.com/avarayr)
- [@baboon-king](https://github.com/baboon-king)
- [@billywhizz](https://github.com/billywhizz)
- [@bmwalters](https://github.com/bmwalters)
- [@Boshen](https://github.com/Boshen)
- [@braden-w](https://github.com/braden-w)
- [@c-stoeckl](https://github.com/c-stoeckl)
- [@carlsmedstad](https://github.com/carlsmedstad)
- [@chrislloyd](https://github.com/chrislloyd)
- [@cirospaciari](https://github.com/cirospaciari)
- [@coleleavitt](https://github.com/coleleavitt)
- [@connerlphillippi](https://github.com/connerlphillippi)
- [@crishoj](https://github.com/crishoj)
- [@csvlad](https://github.com/csvlad)
- [@d4mr](https://github.com/d4mr)
- [@darwin808](https://github.com/darwin808)
- [@ddmoney420](https://github.com/ddmoney420)
- [@dioro](https://github.com/dioro)
- [@djs5008](https://github.com/djs5008)
- [@dylan-conway](https://github.com/dylan-conway)
- [@Elfayer](https://github.com/Elfayer)
- [@emwadde](https://github.com/emwadde)
- [@eroderust](https://github.com/eroderust)
- [@fraidev](https://github.com/fraidev)
- [@franklinfollis](https://github.com/franklinfollis)
- [@gameroman](https://github.com/gameroman)
- [@gaowhen](https://github.com/gaowhen)
- [@halil-pan](https://github.com/halil-pan)
- [@hamidrezahanafi](https://github.com/hamidrezahanafi)
- [@HK-SHAO](https://github.com/HK-SHAO)
- [@Hona](https://github.com/Hona)
- [@hoXyy](https://github.com/hoXyy)
- [@ig-ant](https://github.com/ig-ant)
- [@igorkofman](https://github.com/igorkofman)
- [@jackkleeman](https://github.com/jackkleeman)
- [@Jarred-Sumner](https://github.com/Jarred-Sumner)
- [@jsparkdev](https://github.com/jsparkdev)
- [@kirillmarkelov](https://github.com/kirillmarkelov)
- [@kjanat](https://github.com/kjanat)
- [@km-anthropic](https://github.com/km-anthropic)
- [@kylekz](https://github.com/kylekz)
- [@ldkhang1201](https://github.com/ldkhang1201)
- [@Lillious](https://github.com/Lillious)
- [@lydiahallie](https://github.com/lydiahallie)
- [@makuko](https://github.com/makuko)
- [@mariusz4044](https://github.com/mariusz4044)
- [@markovejnovic](https://github.com/markovejnovic)
- [@martinamps](https://github.com/martinamps)
- [@mattermoran](https://github.com/mattermoran)
- [@MiniGod](https://github.com/MiniGod)
- [@mippbipp](https://github.com/mippbipp)
- [@mmitchellg5](https://github.com/mmitchellg5)
- [@nathanosoares](https://github.com/nathanosoares)
- [@nektro](https://github.com/nektro)
- [@nfreya](https://github.com/nfreya)
- [@NicoCevallos](https://github.com/NicoCevallos)
- [@nkxxll](https://github.com/nkxxll)
- [@ocodista](https://github.com/ocodista)
- [@paperclover](https://github.com/paperclover)
- [@pfgithub](https://github.com/pfgithub)
- [@prekucki](https://github.com/prekucki)
- [@rekram1-node](https://github.com/rekram1-node)
- [@remorses](https://github.com/remorses)
- [@RiskyMH](https://github.com/RiskyMH)
- [@robjtede](https://github.com/robjtede)
- [@Ry

_[Truncated at 4000 characters — full notes: https://github.com/oven-sh/bun/releases/tag/bun-v1.4.0]_