Claude Code Release Notes

Claude Code v2.1.11 Release Notes

Claude Code v2.1.11 is now available with important fixes for MCP connection stability and improved HTTP/SSE transport performance.

January 17, 2026 • 2 min read • By Claude World

The Claude Code development team has released version v2.1.11, delivering a focused update that addresses critical connection stability issues for power users working with MCP (Model Context Protocol) integrations.

What’s New

Fixed Excessive MCP Connection Requests

This release resolves a significant issue where HTTP/SSE (Server-Sent Events) transports were generating excessive MCP connection requests. This fix improves:

  • Connection Stability: Reduced unnecessary connection attempts that could cause instability
  • Performance: Lower resource usage and improved response times
  • Reliability: More consistent MCP transport behavior across different network conditions

This improvement is particularly beneficial for users working with complex MCP setups or those experiencing connection timeouts and performance degradation in previous versions.

How to Update

To update to Claude Code v2.1.11:

  1. Check your current version with the version command
  2. Follow the standard update process for your installation method
  3. Restart any active MCP connections to benefit from the fixes
  4. Monitor your connection logs to verify improved stability