Bun

Backend & Infra

Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one

Latest: bun-v1.3.1037 releases8 common errorsUpdated Feb 26, 2026View on GitHub

Release History

bun-v1.3.10

Feb 26, 2026

Bun v1.3.10 has been released, with installation and upgrade instructions provided. Further details are available on the Bun blog.

bun-v1.3.9

Feb 8, 2026

Bun version 1.3.9 has been released, with installation and upgrade instructions provided. Further details are available on the Bun blog.

bun-v1.3.8

Jan 29, 2026

Bun v1.3.8 release notes are available on the official blog, focusing on minor updates and thanking contributors.

bun-v1.3.7

Jan 27, 2026

Bun v1.3.7 is released, with installation and upgrade instructions provided. Further details are available on the official blog.

bun-v1.3.6

Jan 13, 2026

Bun v1.3.6 has been released, thanking 23 contributors for their work. Installation and upgrade instructions are provided.

bun-v1.3.5

Dec 17, 2025

Bun v1.3.5 is a maintenance release featuring contributions from 10 developers. Detailed changes are documented on the official Bun blog.

bun-v1.3.4

Dec 7, 2025

Bun v1.3.4 is a maintenance release featuring contributions from 14 developers. Detailed changes are documented on the official Bun blog.

bun-v1.3.34 fixes5 features

Nov 21, 2025

Bun v1.3.3 introduces new APIs for password hashing, DNS resolution, and promise peeking, alongside significant performance improvements to JSON processing and bug fixes for the installer and fetch API.

bun-v1.3.2

Nov 8, 2025

Bun v1.3.2 is a maintenance release featuring contributions from 18 developers. Detailed changes and improvements are documented in the official release blog post.

bun-v1.3.11 fix

Oct 22, 2025

Bun v1.3.1 is a maintenance release featuring bug fixes identified through fuzzing and contributions from 15 community members.

bun-v1.3.03 fixes6 features

Oct 10, 2025

Bun v1.3 introduces the Bun Shell, a cross-platform solution for executing shell scripts within JavaScript, alongside significant performance improvements for Windows and enhanced framework support.

bun-v1.2.23

Sep 28, 2025

Bun v1.2.23 is a maintenance release featuring contributions from 16 developers. Detailed changes are documented in the official blog post.

bun-v1.2.22

Sep 14, 2025

Bun v1.2.22 is a maintenance release featuring contributions from 14 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.21

Aug 25, 2025

Bun v1.2.21 is a maintenance release involving contributions from 23 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.20

Aug 10, 2025

Bun v1.2.20 is a maintenance release featuring contributions from 19 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.19

Jul 19, 2025

Bun v1.2.19 is a maintenance release featuring contributions from 18 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.18

Jul 3, 2025

Bun v1.2.18 is a maintenance release featuring contributions from 14 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.17

Jun 21, 2025

Bun v1.2.17 is a maintenance release featuring contributions from 15 developers. Detailed changes and improvements are documented on the official Bun blog.

bun-v1.2.16

Jun 12, 2025

Bun v1.2.16 is a maintenance release featuring contributions from 25 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.15

May 28, 2025

Bun v1.2.15 is a maintenance release featuring contributions from 15 developers. Detailed changes are documented in the official release blog post.

bun-v1.2.14

May 21, 2025

Bun v1.2.14 is a maintenance release featuring contributions from 13 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.13

May 10, 2025

Bun v1.2.13 is a maintenance release involving contributions from 7 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.12

May 4, 2025

Bun v1.2.12 is a maintenance release involving contributions from 10 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.11

Apr 29, 2025

Bun v1.2.11 is a maintenance release featuring contributions from 14 developers. Detailed changes are documented in the official Bun blog.

bun-v1.2.10

Apr 17, 2025

Bun v1.2.10 is a maintenance release featuring contributions from 13 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.9

Apr 9, 2025

Bun v1.2.9 is a maintenance release featuring contributions from 13 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.8

Mar 31, 2025

Bun v1.2.8 is a maintenance release involving contributions from 10 developers. Detailed changes are documented in the official blog post.

bun-v1.2.7

Mar 27, 2025

Bun v1.2.7 is a maintenance release featuring contributions from 13 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.6

Mar 25, 2025

Bun v1.2.6 is a maintenance release featuring contributions from 23 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.5

Mar 11, 2025

Bun v1.2.5 is a maintenance release involving contributions from 25 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.4

Feb 26, 2025

Bun v1.2.4 is a maintenance release featuring contributions from 17 developers. Detailed changes are documented in the official release blog post.

bun-v1.2.3

Feb 22, 2025

Bun v1.2.3 is a maintenance release involving contributions from 23 developers. Detailed feature updates and bug fixes are documented on the official Bun blog.

bun-v1.2.2

Feb 1, 2025

Bun v1.2.2 is a maintenance release involving contributions from 12 developers. Detailed changes are documented on the official Bun blog.

bun-v1.2.1

Jan 27, 2025

Bun v1.2.1 is a maintenance release following the major v1.2.0 launch, featuring contributions from 16 developers.

bun-v1.2.01 feature

Jan 22, 2025

Bun 1.2.0 is a major release featuring significant updates and improvements to the runtime. Users can upgrade via the 'bun upgrade' command.

bun-v1.1.45

Jan 17, 2025

Bun v1.1.45 is a maintenance release involving contributions from five developers. Detailed changes are documented on the official Bun blog.

bun-v1.1.44

Jan 17, 2025

Bun v1.1.44 is a maintenance release featuring contributions from 21 community members.

Common Errors

DataCloneError2 reports

DataCloneError in Bun generally arises when attempting to transfer objects between contexts (like worker threads or WASM) that contain non-transferable or non-clonable data, such as functions, native objects, or circular references. To resolve this, either restructure your data to exclude these problematic elements before transferring or leverage structured cloning alternatives allowing custom handling of specific data types that are not natively clonable in Bun. Ensure that you are only transferring plain JavaScript objects, arrays, and primitive values when using the default cloning mechanism.

TimedOutTimeoutError1 report

TimedOutTimeoutError in Bun often arises from network requests exceeding the default timeout, especially with HTTP/2. To fix this, explicitly set a longer timeout or disable HTTP/2 support for the individual request using the `timeout` option or the `http2: false` option, respectively, in the request configuration. You might also need to investigate and address any underlying network connectivity issues.

SyntaxError1 report

A "SyntaxError" in Bun often arises from duplicate export statements, especially when using code splitting or dynamic imports. To resolve this, carefully review your code and bundler configuration to ensure no modules are exporting the same symbol multiple times. Remove the duplicate export statements to eliminate the syntax error.

ZodFlattenedError1 report

ZodFlattenedError in bun often stems from malformed JSON within a package's `package.json` file, usually an unterminated string or missing comma. Inspect your project and dependency `package.json` files for JSON syntax errors using a linter or online validator, and correct the mistakes to resolve the issue. Consider running `bun install` with a specific registry mirror using the `--registry` option as a temporary workaround to bypass problematic package versions if the error lies in an external dependency.

ZodFormattedError1 report

The "ZodFormattedError" during bun installation often arises from syntax errors or incomplete code in package files, especially within dependencies using Zod. To fix it, carefully examine the package's source code (or its dependencies) for unterminated strings, missing semicolons, or invalid JSON. Reporting the specific package causing the issue to its maintainers can also lead to a quick resolution.

InvalidAccessError1 report

InvalidAccessError in Bun often arises when attempting DOM manipulation or accessing browser APIs outside of a proper browser environment or before the DOM is fully loaded. Ensure that your DOM-related operations are wrapped within `document.addEventListener('DOMContentLoaded', function(){ /* code here */ });` or executed within a browser context (if you intended to run browser code). If you're running code intended for Node, replace browser-specific code with Node equivalents or use a library like `jsdom` for a simulated environment.