diff --git a/adr/0001-jwt-rotation.md b/adr/0001-jwt-rotation.md
index a033428..a80dae4 100644
--- a/adr/0001-jwt-rotation.md
+++ b/adr/0001-jwt-rotation.md
@@ -3,3 +3,5 @@
 (Initial — see git history.)
 
 # update 5 (2026-04)
+
+# update 16 (2026-04)