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sinatra

Classy web-development dressed in a DSL

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rackrubysinatraweb-framework
github.com/sinatra/sinatrasinatrarb.com/MITBlake Mizerany, Ryan Tomayko, Simon Rozet +112.5k · 2.1k forks · 529 contributors
Compare
Compares against 4.2.1 (latest stable)
Latest Stable4.2.1Oct 10, 2025
Latest RC2.0.1.rc1Feb 13, 2018
Latest Beta2.0.0.beta2Aug 22, 2016
Release cadenceEvery 4 months
Last releaseOct 10, 2025
Open advisories0
Changelog quality100% curated
CHANGELOG
Release history SecurityYou're on
3.x4.x
STABLE · RCPRE-RELEASE2023AprJulOct2024AprJulOct2025AprJulOct

94 older or filtered releases not shown.

Upgrade guides

Breaking changes and a migration checklist for each major version
sinatra 3 → 43.2.0 → 4.2.1Oct 10, 2025 BreakingBreaking4Security3Platform1New3Changed3Fixed12sinatra 2 → 32.2.4 → 3.2.0Dec 29, 2023 BreakingBreaking11Security3Platform1Deprecated1New9Changed2Fixed15Other4sinatra 1 → 21.4.8 → 2.2.4Dec 16, 2022 Unknownsinatra 0.9 → 10.9.6 → 1.4.8Jan 30, 2017 Unknownsinatra 0.3 → 0.90.3.3 → 0.9.6Mar 7, 2010 Unknownsinatra 0.2 → 0.30.2.2 → 0.3.3Jul 25, 2009 Unknownsinatra 0.1 → 0.20.1.7 → 0.2.2Jul 25, 2009 Unknown
VersionChannelDateChangesSecurity
4.2.1 StableOct 10, 2025Fixed14.2.0 StableOct 8, 2025Security2New1Fixed3Fix4.1.1 youStableNov 20, 2024Fixed14.1.0 StableNov 18, 2024Security1New1Changed2Fixed8Fix4.0.1 StableMay 23, 2025Changed1Fixed74.0.0 StableJan 19, 2024Breaking4Platform1New13.2.0 StableDec 29, 2023New3Fixed43.1.0 StableAug 7, 2023New3Changed1Fixed23.0.6 StableApr 11, 2023Fixed33.0.5 StableDec 16, 2022Fixed23.0.4 StableNov 25, 2022Security2Fix3.0.3 StableNov 11, 2022Security13.0.2 StableOct 1, 2022New13.0.1 StableSep 26, 2022Fixed23.0.0 StableSep 26, 2022Breaking11Platform1Deprecated1New2Changed1Fixed2Other42.2.4 StableDec 16, 2022No changes listed2.2.3 StableNov 25, 2022No changes listedFix2.2.2 StableJul 23, 2022No changes listed2.2.1 StableJul 15, 2022No changes listed2.2.0 StableFeb 15, 2022No changes listedFix