To install Bun v1.0.2:

curl https://bun.sh/install | bash
# or you can use npm
# npm install -g bun

To upgrade to Bun v1.0.2:

bun upgrade

Read Bun v1.0.2's release notes on Bun's blog

What's Changed

• fix(bun-lambda) Fix API Gateway V1 events and expand on Lambda documentation by @mkossoris in #5161
• fix lifecycle docu by @ximex in #5159
• docs: fix typos by @s-rigaud in #5151
• Updated Lambda readme by @tsndr in #5127
• Add missing full stop on nodejs-apis.md by @diogo405 in #5072
• update dev build instruction for arch by @mi4uu in #5069
• fix typo and grammar errors in bunfig.toml by @xNaCly in #5046
• Update simple.md by @tomredman in #4997
• Update hot.md by @nazeelashraf in #4990
• docs: fix typo in import.meta.resolve by @jonathantneal in #5146
• [Docs] Use git's --global flag for lockfile diffs instead of manually editing config files. by @Southpaw1496 in #5143
• Various docs by @colinhacks in #5201
• docs: Made bun-types install as dev dependency in example by @MasterGordon in #5120
• js/node/stream.js: call write() callback when encoding is not provided by @cfal in #4841
• Correct the configuration file names. by @nathanhammond in #5234
• decode regex if needed by @dylan-conway in #5167
• Update misleading documentation link by @0x346e3730 in #5227
• file.exists() needs to be awaited to get the value by @amt8u in #5061
• docs(runtime): fix jsx FragmentFactory output example by @zongzi531 in #5243
• Add informative message on bun create react by @colinhacks in #5248
• chore: make comment grammatically correct by @G-Rath in #5140
• docs(runtime): fix plugins loader extensions typo by @zongzi531 in #5250
• avoid inserting extraneous"accept-encoding" header by @iidebyo in #5057
• fix(node/fetch): Make data URL fetch consistent with node by @davidmhewitt in #5126
• docs: update lockfile diff instructions by @gtramontina in #5275
• add uninstall instructions by @browner12 in #5311
• docs(guide): fix expect assertion example in guide for spyOn by @winghouchan in #5294
• chore(docs): include missing links to Node.js APIs by @styfle in #5281
• Fixed api & cli docs typo. by @jamesgordo in #5262
• fix(runtime): require cache should not include unevaluated ESM modules. by @paperdave in #5233
• Make --watch instant by @Jarred-Sumner in #5236
• feat(nodejs): implement os.availableParallelism by @WingLim in #5109
• fix(console.log) fix printing long custom format by @cirospaciari in #5164
• fix(node:dns): fix crash and compatibility issues with resolve by @Hanaasagi in #5200
• fix(doc): Add "compilerOptions" to bun-types README.md by @philolo1 in #5325
• fix(BunFile.slice) fix slice when length is greater than the size by @cirospaciari in #5186
• More docs & helptext cleanup by @colinhacks in #5229
• doc(guides): update sveltekit guide by @mroyme in #5285
• modules documentation didn't have correct import example by @miccou in #5225
• fix link to "local template" by @desm in #5115
• chore: test for overwriting _resolveFilename by @paperdave in #5244
• Fix bug with multiline string in CRLF terminated files (#4893) by @tikotzky in #5318
• fix(runtime): make most globals configurable/deletable, allow resuming the console iterator by @paperdave in #5216
• fix(Bun.serve) fix buffering edge case by @cirospaciari in #5152
• Update nextjs.md by @kryparnold in #4905
• Update simple.md by @TwanLuttik in #4881
• Update nuxt.md by @s0h311 in #4452
• Remove the ability to configure lockfile location. by @nathanhammond in #5335
• In bunx, always get latest version when @latest is explicitly passed by @Jarred-Sumner in #5346
• Fix typo in HTTPThread name by @chrisbodhi in #5376
• docs - Add "workspace:*" to workspace docs. by @dylang in #5379
• fix(docs): Fix the text that bun run --bun is the same as bun by @DuGlaser in #4647
• fix warnings during bun run publish-layer by @nangchan in #5419
• fix(runtime): emit node:net connect error event vs throw by @paperdave in #5336
• v8 date parser tests by @dylan-conway in #5332
• async-ify all node:fs functions by @Jarred-Sumner in #5360
• fix dockerfile by @Jarred-Sumner in #5439
• fix http set cookie headers by @dylan-conway in #5428
• fix(nitro) fix sourcemaps and JSSink closing by @cirospaciari in #5422
• Update docs/quickstart.md by @sonyarianto in #5425
• dup and close file descriptors by @dylan-conway in #5341
• Make bun run --silent omit "error: "..." exited with code 1 by @Jarred-Sumner in #5459
• Does not fix #4622 by @Jarred-Sumner in #5452
• fix(proxy): allow empty string http_proxy env by @Hanaasagi in #5464
• Implement URL.canParse by @Jarred-Sumner in #5463
• Fixes #5461 by @Jarred-Sumner in #5467
• Fixes #5465 by @Jarred-Sumner in #5468

New Contributors

• @mkossoris made their first contribution in #5161
• @ximex made their first contribution in #5159
• @s-rigaud made their first contribution in #5151
• @tsndr made their first contribution in #5127
• @mi4uu made their first contribution in #5069
• @xNaCly made their first contribution in #5046
• @tomredman made their first contribution in #4997
• @nazeelashraf made their first contribution in #4990
• @jonathantneal made their first contribution in #5146
• @Southpaw1496 made their first contribution in #5143
• @MasterGordon made their first contribution in #5120
• @cfal made their first contribution in #4841
• @nathanhammond made their first contribution in #5234
• @0x346e3730 made their first contribution in #5227
• @amt8u made their first contribution in #5061
• @zongzi531 made their first contribution in #5243
• @G-Rath made their first contribution in #5140
• @iidebyo made their first contribution in #5057
• @gtramontina made their first contribution in #5275
• @browner12 made their first contribution in #5311
• @winghouchan made their first contribution in #5294
• @philolo1 made their first contribution in #5325
• @mroyme made their first contribution in #5285
• @miccou made their first contribution in #5225
• @desm made their first contribution in #5115
• @tikotzky made their first contribution in #5318
• @kryparnold made their first contribution in #4905
• @TwanLuttik made their first contribution in #4881
• @s0h311 made their first contribution in #4452
• @chrisbodhi made their first contribution in #5376
• @dylang made their first contribution in #5379
• @DuGlaser made their first contribution in #4647
• @nangchan made their first contribution in #5419
• @sonyarianto made their first contribution in #5425

Full Changelog: bun-v1.0.1...bun-v1.0.2