diff --git a/chain/consensus/filcns/upgrades.go b/chain/consensus/filcns/upgrades.go
index c1f594a9207..f258de5405a 100644
--- a/chain/consensus/filcns/upgrades.go
+++ b/chain/consensus/filcns/upgrades.go
@@ -271,7 +271,7 @@ func DefaultUpgradeSchedule() stmgr.UpgradeSchedule {
 		Migration: UpgradeActorsV12,
 		PreMigrations: []stmgr.PreMigration{{
 			PreMigration:    PreUpgradeActorsV12,
-			StartWithin:     120,
+			StartWithin:     180,
 			DontStartWithin: 15,
 			StopWithin:      10,
 		}},