# \#protocol-version **URL:** https://forum.canton.network/tag/protocol-version/337.md [Latest](https://forum.canton.network/latest.md) · [Categories](https://forum.canton.network/categories.md) · [Tags](https://forum.canton.network/tags.md) --- ## [Hard domain and binary migration in one](https://forum.canton.network/t/hard-domain-and-binary-migration-in-one/7317)
**Author:** [@b\_heather](https://forum.canton.network/u/b_heather)\ **Replies:** 0\ **Last updated:** [July 18, 2024, 2:27pm UTC](https://forum.canton.network/t/hard-domain-and-binary-migration-in-one/7317 "2024-07-18T14:27:59Z")
Background With the release of 2.9 PV versions 3 and 4 are no longer supported. This means that in order to make use of 2.9s great new features a combined binary and protocol version upgrade may be required in one proces…