We’re happy to announce that Mastodon 4.5 is now ready for prime time! Quote posts, async fetching of replies, server timeline visibility settings, more moderation tools, and lots and lots of other tweaks and improvements.

Announcement on our blog: https://blog.joinmastodon.org/2025/11/mastodon-4.5/

Full release notes and update instructions are available on our GitHub release page: https://github.com/mastodon/mastodon/releases/tag/v4.5.0

#mastoadmin

Mastodon 4.5

Quote posts, the end of missing replies, new tools for admins and better emojis. All of these and more, in our latest release.

Mastodon Blog
@MastodonEngineering Is there an easy way to determine which version my instance is currently running?
social.coop

A Fediverse instance for people interested in cooperative and collective projects. If you are interested in joining our community, please apply at https://wiki.social.coop/wiki/Registration_form

Mastodon hosted on social.coop
@jsbarretto @MastodonEngineering usually visible at the bottom of your instance home page or about page.
@jsbarretto @MastodonEngineering
In the web UI you can find it at the bottom of the column on the right
@MastodonEngineering thanks for your work, you are awesome!

@MastodonEngineering Awesome! I'm excited 4.5 is finally stable!!

@kiteless Do you think you could update this instance? Thanks in advance! 

@helloyanis @MastodonEngineering

We like to let new versions marinade just a little before an update but I'll talk to @keiko about it. Thanks!

@kiteless @helloyanis @MastodonEngineering I'm building this now. I'll see how quickly I can get it deployed.
@kiteless @helloyanis @MastodonEngineering Very strangely the db:migrate step failed trying to re-do migration 20250129144440 which failed as the indexes it was trying to create already existed. I added that migration to the schema_migrations table and re-did the upgrade and it succeeded. Don't know how I got into that state, but figuring that out caused our instance to be down for nearly 20 minutes :(

@keiko @kiteless @MastodonEngineering Awesome! Thanks for your work! Now we got quoting, that's really cool!
Don't worry about the downtime, stuff like that can happen when upgrading. It's not that big of a deal since it's solved now! 

To be quoted, set it up in your user settings. Try quoting this toot, you should be able to!

@keiko @kiteless @MastodonEngineering Although it seems I can't get quotes to work (unless everyone I see has disabled it and you can't quote your own post, or maybe the Mastodon app has no support for it yet?)
I can edit who can quote but I don't see a way to quote anyone.
@helloyanis @kiteless @MastodonEngineering In the web interface, click on the "boost or quote" (the two horizontal arrows pointed in opposite directions) and choose "quote"
@helloyanis @keiko @kiteless @MastodonEngineering Masto app has caught on for a few weeks with quotes already, but not many servers support it (yet)
@MastodonEngineering Great job! As a tiny instance owner, these updates are painless for me thanks to all your work.
@MastodonEngineering Nice easy update. Thanks!

@MastodonEngineering
Thanks a lot! Update from 4.4.0 went straight through. 🙏

econgood.social is now running on 4.5.0 🎉