diff --git a/runbooks/postgres-failover.md b/runbooks/postgres-failover.md
index e1efddd..6a6a2a8 100644
--- a/runbooks/postgres-failover.md
+++ b/runbooks/postgres-failover.md
@@ -1,3 +1,5 @@
 # internal-docs — postgres-failover
 
 (Initial — see git history.)
+
+# update 11 (2026-04)