# charset_normalizer 3.5.1 — Version 3.5.1

- Product: charset_normalizer (https://whatsnew.fyi/product/charset-normalizer)
- Vendor: charset_normalizer
- Date: 2026-08-15
- Version: 3.5.1
- Original notes: https://github.com/jawah/charset_normalizer/releases/tag/3.5.1
- Permalink: https://whatsnew.fyi/product/charset-normalizer/releases/3.5.1

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- **changed** — Raise upper bound of setuptools to v84
- **changed** — Optimize cache performance access for CharInfo struct in prebuilt versions
- **fixed** — No longer decode large content when the noise detector output gives high entropy for inputs larger than 1M bytes

###### Changed
- Raised upper bound of setuptools to v84 (#794)
- Cache performance access optimization for our CharInfo struct (prebuilt only).

###### Fixed
- No longer decoding large content when the noise detector output give a high entropy.
  Only impacted large content input >1M bytes.