# Upcoming 1.20 release **URL:** \ **Category:** Official\ **Created:** [April 3, 2026, 2:44pm UTC](https://forum.crystal-lang.org/t/upcoming-1-20-release/8842 "2026-04-03T14:44:04Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ysbaddaden](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/ysbaddaden/32/2252_2.png) [@ysbaddaden](https://forum.crystal-lang.org/u/ysbaddaden)\ **Post date:** [April 3, 2026, 2:44pm UTC](https://forum.crystal-lang.org/t/upcoming-1-20-release/8842/1 "2026-04-03T14:44:04Z")
The next Crystal release, **1.20** is scheduled for **2026-04-16**. As usual, this is precluded by a two-week feature **freeze period** , starting **2026-04-02** (yesterday). We’ll be using this time until the release to consolidate the changes and fix bugs. A preview of the release notes is available: [Crystal 1.20.0 is released! - The Crystal Programming Language](https://deploy-preview-1052--crystal-website.netlify.app/2026/01/16/1.20.0-released/) (PR: [#1052](https://github.com/crystal-lang/crystal-website/pull/1052)) Some of the highlights: - `Process` enhancements such as `Process.capture` as per [RFC 0025](https://github.com/crystal-lang/rfcs/pull/25) - Short option bundling in `OptionParser` so we can type `-ncb` instead of `-n -c -b` for example - Execution contexts improvements: - M:N scheduling - Don’t block a thread on blocking syscalls (e.g. `getaddrinfo`) - Dynamic scaling - Experimental Linux io\_uring event loop (_not merged_) - Kernel TLS on Linux and FreeBSD - Support for LLVM 22.1 and 23 The enhancements to `Process` are making us closer to support Windows as a first tier platform! ❤ You can find all changes in the [(provisional) changelog](https://github.com/crystal-lang/crystal/blob/changelog/1.20.0/CHANGELOG.md) (PR: [#16751](https://github.com/crystal-lang/crystal/pull/16751)). There will be further additions to these resources as we merge additional changes. > ℹ Nightly builds reflect the upcoming stable release! Please **test your code base against nightly builds** and report any regressions 🙇 > > See the instructions for installing [nightly builds](https://crystal-lang.org/install/nightlies/). ---
**Author:** ![ysbaddaden](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/ysbaddaden/32/2252_2.png) [@ysbaddaden](https://forum.crystal-lang.org/u/ysbaddaden)\ **Post date:** [April 3, 2026, 4:11pm UTC](https://forum.crystal-lang.org/t/upcoming-1-20-release/8842/2 "2026-04-03T16:11:25Z")
Sadly, no release of execution contexts, yet. Not that they’re unstable, quite the opposite (💪) but there are a few MT issues that need further investigation that didn’t make it into 1.20, notably: - [Thread-safety for union types · Issue #15085 · crystal-lang/crystal · GitHub](https://github.com/crystal-lang/crystal/issues/15085) (impacts the type system) - [Ensuring `class_getter` runs exactly once under concurrent access · Issue #14905 · crystal-lang/crystal · GitHub](https://github.com/crystal-lang/crystal/issues/14905) (impacts lazy initializers) And an issue with Windows / IOCP: - [Windows/IOCP: handles are tied to a specific IOCP instance · Issue #16675 · crystal-lang/crystal · GitHub](https://github.com/crystal-lang/crystal/issues/16675) See the [MT board](https://github.com/orgs/crystal-lang/projects/12/views/1). ---
**Author:** ![straight-shoota](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/straight-shoota/32/36_2.png) [@straight-shoota](https://forum.crystal-lang.org/u/straight-shoota)\ **Post date:** [April 7, 2026, 9:46am UTC](https://forum.crystal-lang.org/t/upcoming-1-20-release/8842/3 "2026-04-07T09:46:51Z")
2 posts were split to a new topic: [Constant time cryptography](https://forum.crystal-lang.org/t/constant-time-cryptography/8847)