diff --git a/CHANGELOG.md b/CHANGELOG.md
index 733f592..a1c1a98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## 1.1.280 — 2026-10-09
+
 ### Fixes
 
 - Restore legacy MCP HTTP+SSE endpoints alongside Streamable HTTP on the same `--mcp` server using SDK 2.2. No extra option is required. Bound outstanding legacy requests to 16 across all sessions and reject excess requests without queuing.