We released Holochain 0.5.5 on 19 August and all tooling and libraries are now up to date.
With these releases, we’re continuing to work on network performance for the Holochain 0.5.x series. There’s been a bunch of bug fixes and improvements:
Read Article: https://blog.holochain.org/dev-pulse-151-network-improvements-in-0-5-5-and-0-5-6/