Node 18.x and 20.x are being deprecated as supported runtimes for Chatflows custom code snippets. If you have bot code snippets running on either of these versions, you need to upgrade them to Node 24.x before August 31st, 2026, or you will lose the ability to edit those snippets until the upgrade is completed.
What's Changing
Node 18.x and 20.x have reached end of life and no longer receive security patches. To keep Chatflows custom code snippets on a secure, maintained foundation, HubSpot is deprecating support for these runtimes in favor of Node 24.x, the current long-term support (LTS) release.
To make upgrading easier, you can now change the Node.js runtime version of an existing bot code snippet in-place, without deleting and recreating the snippet. In the bot snippet editor, look for the option to change the runtime version. Your code, environment variables, and configuration are preserved through the switch. This capability is rolling out gradually over the next 2 weeks.
After August 31st, 2026, any snippet still running on Node 18.x or 20.x will become read-only. You won't be able to edit it until you upgrade the runtime to a supported version.
When Is It Happening?
Upgrade your Chatflow bot code snippets to Node 24.x before August 31st, 2026. After that date, snippets on unsupported runtimes will be locked from editing until upgraded. The in-place runtime switching feature is rolling out to Data Hub Professional and Enterprise customers now.
Questions or comments? Join us in the developer forums.