Scheduled urgent protocol upgrade - Arbitrum
Scheduled for November 27, 2025 at 10:00 PM – November 28, 2025 at 2:00 AM
Affects
Chainstack Console
Under maintenance from 10:00 PM to 2:00 AM
Arbitrum Global Nodes
Under maintenance from 10:00 PM to 2:00 AM
Arbitrum One Mainnet
Under maintenance from 10:00 PM to 2:00 AM
Arbitrum Sepolia
Under maintenance from 10:00 PM to 2:00 AM
Arbitrum Trader Nodes
Under maintenance from 10:00 PM to 2:00 AM
Arbitrum One Mainnet Archive (Chainstack Cloud, Frankfurt)
Under maintenance from 10:00 PM to 2:00 AM
Completed
November 28, 2025 at 2:00 AMCompleted
November 28, 2025 at 2:00 AMMaintenance has completed successfully
In progress
November 27, 2025 at 10:00 PMIn progress
November 27, 2025 at 10:00 PMMaintenance is now in progress
Planned
November 27, 2025 at 10:00 PMPlanned
November 27, 2025 at 10:00 PMUpgrade Details: We will upgrade the protocol Arbitrum to version 3.9.3, as part of implementing ArbOS 51
What to expect:
The upgrade process is expected to take approximately 4 hours
During this period, there may be temporary disruptions or degraded performance
No action is required on your end, our team will handle the upgrade seamlessly
We will be closely monitoring the process to ensure a smooth transition and will provide updates as needed. Thank you for your patience and support!
If you have any questions, feel free to reach out at support@chainstack.com
