# Ruby 4.0.4 — Ruby 4.0.4 Released - Product: Ruby (https://whatsnew.fyi/product/ruby) - Vendor: Ruby - Date: 2026-05-11 - Version: 4.0.4 - Original notes: https://www.ruby-lang.org/en/news/2026/05/11/ruby-4-0-4-released/ - Permalink: https://whatsnew.fyi/product/ruby/releases/4.0.4 What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'. --- Ruby 4.0.4 has been released. This is a routine update that includes bugfixes. Please see the GitHub Releases for further details. Release Schedule We intend to release the latest stable Ruby version…