# User website preference is invalid with underscore

**URL:** https://meta.discourse.org/t/user-website-preference-is-invalid-with-underscore/41784
**Category:** Support
**Created:** [March 30, 2016, 6:14pm UTC](https://meta.discourse.org/t/user-website-preference-is-invalid-with-underscore/41784 "2016-03-30T18:14:39Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![Ondrej\_Caletka](https://avatars.discourse-cdn.com/v4/letter/o/a9a28c/32.png) [@Ondrej\_Caletka](https://meta.discourse.org/u/Ondrej_Caletka)
#### Post date: [November 15, 2016, 1:54pm UTC](https://meta.discourse.org/t/user-website-preference-is-invalid-with-underscore/41784/6 "2016-11-15T13:54:04Z")

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And what about IDNs? The regular expression validating the website url is so strict that I can’t fit in my perfectly valid URL [https://ondřej.caletka.cz](https://xn--ondej-kcb.caletka.cz)

Even using Punycode form of [https://ondřej.caletka.cz](https://xn--ondej-kcb.caletka.cz) is not accepted, even though it is perfectly valid here in this very forum post.

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