diff --git a/PLAN.md b/PLAN.md
index 6583d38b74b6b241964bb82ffdd99c284431cea3..f8551f35bab68640baff03394607ebe124db06dd 100644
--- a/PLAN.md
+++ b/PLAN.md
@@ -331,7 +331,7 @@
 preceding gate passes. If a feasibility gate fails, change the design before
 you continue the feature work.
 
-**Current milestone:** Milestone 5.3 — Review.
+**Current milestone:** Milestone 5.4 — Merge.
 Update this marker only after the current milestone gate passes.
 
 ### Architecture