# \[ANN\] uri.4.4.0

**URL:** <https://discuss.ocaml.org/t/ann-uri-4-4-0/13119>\
**Category:** Community\
**Tags:** web, announce\
**Created:** [September 28, 2023, 8:06am UTC](https://discuss.ocaml.org/t/ann-uri-4-4-0/13119 "2023-09-28T08:06:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dinosaure](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/dinosaure/32/16_2.png) [@dinosaure](https://discuss.ocaml.org/u/dinosaure)\
**Post date:** [September 28, 2023, 8:06am UTC](https://discuss.ocaml.org/t/ann-uri-4-4-0/13119/1 "2023-09-28T08:06:50Z")

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Yours truly is delighted to announce the release of Uri 4.4.0. [`ocaml-uri`](https://github.com/mirage/ocaml-uri) is a library for manipulating URIs in accordance with [RFC 3986](https://datatracker.ietf.org/doc/html/rfc3986). This announcement allows us to clarify a **breaking change** in the interpretation of IPv6. Previous versions did not interpret IPv6 in the `host` part of the URI - we simply escaped the special characters. This version of `uri` now interprets IPv6 addresses in the `host` part. This implies a change in the library’s behaviour which may have some impact on software using this library. This announcement clarifies this “breaking change”.

The library is available from OPAM: `opam install uri.4.4.0`. From what we have been able to observe, this breaking-change does not have a _direct_ impact on the ecosystem. The release went ahead without any software being broken. However, we would like to warn you of such a change. The [issues](https://github.com/mirage/ocaml-uri/issues) are open if you notice any unwanted behaviour in the library.

Best,