PyPI
nbformat
The Jupyter Notebook format
InteractiveInterpreterShellWeb
github.com/jupyter/nbformatjupyter.orgBSD-3-ClauseJupyter Development Team21.8M / week315 · 180 forks · 86 contributors
Release cadenceEvery 3 weeks
Last releaseAug 17, 2026
Open advisories0
Changelog quality100% curated
GitHub Releases + CHANGELOG
Release history SecurityYou're on
35 older or filtered releases not shown.
Upgrade guides
Breaking changes and a migration checklist for each major versionVersionChannelDateChangesSecurity
5.11.1 StableAug 17, 2026Changed1Other45.11.0 StableAug 6, 2026Breaking1Deprecated1New1Changed2Other185.10.4 youStableApr 4, 2024New25.10.3 StableMar 15, 2024Fixed15.10.2 StableMar 12, 2024New15.10.1 StableMar 12, 2024Other15.10.0 StableMar 12, 2024New11Changed15.9.2 StableJul 31, 2023New2Fixed15.9.1 StableJul 10, 2023New15.9.0 StableMay 31, 2023New2Changed15.8.0 StableMar 20, 2023New65.7.3 StableJan 12, 2023New15.7.2 StableJan 11, 2023New3Fixed15.7.1 StableDec 19, 2022New105.7.0 StableOct 10, 2022Fixed2Other15.6.1 StableSep 26, 2022No changes listed5.6.0 StableSep 21, 2022No changes listed5.5.0 StableSep 13, 2022No changes listed5.5.0b1 BetaAug 17, 2022No changes listed5.4.0 StableMay 3, 2022No changes listed