# Crystal 1.18.1

- Product: Crystal (https://whatsnew.fyi/product/crystal)
- Vendor: Crystal Language
- Date: 2025-10-17
- Version: 1.18.1
- Original notes: https://github.com/crystal-lang/crystal/releases/tag/1.18.1
- Permalink: https://whatsnew.fyi/product/crystal/releases/1.18.1

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'.

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- **fixed** — Revert adding type restrictions on HTTP::WebSocket#send etc.
- **fixed** — Fix allow space after base type in enum def

###### Bugfixes

###### stdlib

- _(networking)_ **[regression]** Revert adding type restrictions on `HTTP::WebSocket#send` etc. ([#16218], thanks @straight-shoota)

[#16218]: https://github.com/crystal-lang/crystal/pull/16218

###### compiler

- _(parser)_ **[regression]** Fix allow space after base type in enum def ([#16217], thanks @straight-shoota)

[#16217]: https://github.com/crystal-lang/crystal/pull/16217

###### Infrastructure

- Changelog for 1.18.1 ([#16224], thanks @matiasgarciaisaia)

[#16224]: https://github.com/crystal-lang/crystal/pull/16224