# Zod v4.5.3

- Product: Zod (https://whatsnew.fyi/product/zod)
- Vendor: Colin McDonnell
- Date: 2026-08-29
- Version: v4.5.3
- Original notes: https://github.com/colinhacks/zod/releases/tag/v4.5.3
- Permalink: https://whatsnew.fyi/product/zod/releases/v4.5.3

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** — emit record numeric keys as strings in toJSONSchema

##### Commits:

- e6b6ab347675cd2bd54b1bdbed16f98c59be82a9 docs(blog): widen the z.compile example to a 20-property schema
- 87d6464418582bb96fc665a01f852ca6da324ad0 fix(docs): drop the OG description when the title wraps past two lines
- 99fce394a026823e602b9c30d8d5d9f5f1932ce7 bench(v4): z.compile() against zod-compiler (#6499)
- e3a695b6bf3f0d591ea682816e3cdaea04b0f967 docs(v4): record the email regex and container output-shape findings under Open
- 7e24a24288183ce02554f1ded7775d0650a7b7e6 docs(blog): drop the reading time and put a GitHub link in the navbar
- eab51ff3592b2d11d863f4ee4d5452f31a3de1b6 fix(v4): emit record numeric keys as strings in toJSONSchema (#6497)