On March 20, 2026 at 9:30 PM UTC, the following WebSocket changes will go live to improve performance and stability:

- The server will no longer send application-level ping messages
- To keep the connection alive, clients will be expected to send a WebSocket ping frame (or any message) at least once every 2 minutes
- If the server does not receive any frames from a client for 2 minutes, the connection will be closed
- Clients that fall behind on reading messages (e.g. not consuming order book updates quickly enough) may be disconnected more aggressively than before
- The 24-hour forced connection lifetime will be removed, so well-behaved connections will be able to remain open indefinitely
- WebSocket compression (permessage-deflate) will be enabled, so clients that support it can benefit from reduced bandwidth usage

Additionally, the above changes will be deployed on testnet in a few days, allowing ample time to test the new logic.