Ruby 4.0.1 Released

Posted by k0kubun on 13 Jan 2026

Ruby 4.0.1 has been released.

This release includes a bugfix for spurious wakeup from Kernel#sleep when subprocess exits in another thread, along with other bugfixes. Please see the GitHub releases for further details.

Release Schedule

We intend to release the latest stable Ruby version (currently Ruby 4.0) every two months following the most recent release. Ruby 4.0.2 will be released in March, 4.0.3 in May, 4.0.4 in July, 4.0.5 in September, and 4.0.6 in November.

If a change arises that significantly affects users, a release may occur earlier than planned, and the subsequent schedule may shift accordingly.

Download

• https://cache.ruby-lang.org/pub/ruby/4.0/ruby-4.0.1.tar.gz

  SIZE: 23807304
  SHA1: 01db5746bbb29b028bd44d505a147d06866b1ab2
  SHA256: 3924be2d05db30f4e35f859bf028be85f4b7dd01714142fd823e4af5de2faf9d
  SHA512: f4eead09c7355b878a34343dd8cfb9c4c36f02ad3b9a7fd42981d722444beca0182ddea4fc771e2e01a05d9f14978a979ba0ba3590d366f53b6947f43fd78aff
  

• https://cache.ruby-lang.org/pub/ruby/4.0/ruby-4.0.1.tar.xz

  SIZE: 17892492
  SHA1: 266e6fa80ed2b4f4bb7de2e98973dc084a1f380e
  SHA256: 0531fe57dfdb56bf591620d2450642ea0e0964f3512a6ebee7dc9305de69395f
  SHA512: b67d9d1f97ba30200d103f8454e39dc2d0450819d51d91eb5451d44b0bafc56d2fa48bb1be6c5081babe5828f679984bad02b9bcee7441f6bd34c0a95b8f200b
  

• https://cache.ruby-lang.org/pub/ruby/4.0/ruby-4.0.1.zip

  SIZE: 29107093
  SHA1: d3a9217c848b22636025c525971578557ba5f7a3
  SHA256: 36cbcea4972e201464ae1c6686a3a785b115aee9b836d9bbbe6d961dcef2358d
  SHA512: a8512d3f57254bfacfd4c68ee50bb7cad3168f4d9c3be51658378e5db589032745759c360d8711a060b2ed5b9b78855e498b54fcba869a4e60f03ed4aae68ea8
  

Release Comment

Many committers, developers, and users who provided bug reports helped us make this release. Thanks for their contributions.