# Bitcoin core 29.3.1?
**URL:** https://community.start9.com/t/bitcoin-core-29-3-1/5782
**Category:** Services Support
**Tags:** services
**Created:** [September 29, 2026, 5:00pm UTC](https://community.start9.com/t/bitcoin-core-29-3-1/5782 "2026-09-29T17:00:35Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Joseph](https://community.start9.com/u/Joseph)
#### Post date: [September 29, 2026, 5:00pm UTC](https://community.start9.com/t/bitcoin-core-29-3-1/5782/1 "2026-09-29T17:00:35Z")
Hi,
I’m running Bitcoin core 29.3.0 on Start9 0.3.5.1.
It’s showing there’s an update available for Bitcoin 29.3.1.
However I cannot find any reference to Bitcoin 29.3.1 at [Bitcoincore.org](http://Bitcoincore.org)
Can anybody help me understand what this update is about and where does it come from?
Thanks
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### Author:  [@Rexter](https://community.start9.com/u/Rexter)
#### Post date: [September 29, 2026, 5:24pm UTC](https://community.start9.com/t/bitcoin-core-29-3-1/5782/2 "2026-09-29T17:24:01Z")
There is no functional difference. It’s just a package wrapper version bump, to match the BIP-110 version of Knots. On StartOS 0.3.5.1, the versions numbers had to match in order to “reinstall” from one to the other. This allowed people to switch from the latest version, at that time, of Bitcoin Knots to Bitcoin Core while preserving their Blockchain data.
Since the chain split, none of this is really relevant any more, and you really should update to StartOS 0.4.0.
[https://docs.start9.com/start-os/0.4.0.x/update-040.html](https://docs.start9.com/start-os/0.4.0.x/update-040.html)
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### Author:  [@Joseph](https://community.start9.com/u/Joseph)
#### Post date: [September 29, 2026, 5:53pm UTC](https://community.start9.com/t/bitcoin-core-29-3-1/5782/3 "2026-09-29T17:53:39Z")
Hi Rexter, thanks for the swift reply!
Sure, I’m planning to move to Start OS 0.4.0 as soon as JAM is also fully supported.
By the way, do you know if RPC cookie is now supported on Bitcoin in Start9 0.4.0 instead of username & password?
Thanks a lot!
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### Author:  [@Rexter](https://community.start9.com/u/Rexter)
#### Post date: [September 30, 2026, 4:12pm UTC](https://community.start9.com/t/bitcoin-core-29-3-1/5782/4 "2026-09-30T16:12:01Z")
Just to make sure I understand the question in proper context, what are you trying to, or would like to do with RPC cookie?
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### Author:  [@Joseph](https://community.start9.com/u/Joseph)
#### Post date: [September 30, 2026, 7:01pm UTC](https://community.start9.com/t/bitcoin-core-29-3-1/5782/5 "2026-09-30T19:01:35Z")
Under my current setup (Start9 OS 0.3.5.1) I’ve got a bunch of services (electrs, jam…) interacting with the Bitcoin service using RPC user & password because cookie auth was not supported. I remember reading that 0.4.0 would allow cookie auth for other services to interact with Bitcoin.
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### Author:  [@system](https://community.start9.com/u/system)
#### Post date: [October 7, 2026, 12:23pm UTC](https://community.start9.com/t/bitcoin-core-29-3-1/5782/6 "2026-10-07T12:23:11Z")
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