diff --git a/build/forks.go b/build/forks.go
index 51f292123..113e4a7c0 100644
--- a/build/forks.go
+++ b/build/forks.go
@@ -1,3 +1,5 @@
 package build
 
 const ForkBlizzardHeight = 6288
+
+const ForkFrigidHeight = 7950
diff --git a/build/version.go b/build/version.go
index e52d0ab62..1c9442ffd 100644
--- a/build/version.go
+++ b/build/version.go
@@ -5,7 +5,7 @@ import "fmt"
 var CurrentCommit string
 
 // BuildVersion is the local build version, set by build system
-const BuildVersion = "0.2.3"
+const BuildVersion = "0.2.4"
 
 var UserVersion = BuildVersion + CurrentCommit
 
diff --git a/chain/actors/actor_init.go b/chain/actors/actor_init.go
index 2bb31ce7f..f71704c5c 100644
--- a/chain/actors/actor_init.go
+++ b/chain/actors/actor_init.go
@@ -161,7 +161,7 @@ func (ia InitActor) Exec(act *types.Actor, vmctx types.VMContext, p *ExecParams)
 
 func IsBuiltinActor(code cid.Cid) bool {
 	switch code {
-	case StorageMarketCodeCid, StoragePowerCodeCid, StorageMinerCodeCid, AccountCodeCid, InitCodeCid, MultisigCodeCid, PaymentChannelCodeCid:
+	case StorageMarketCodeCid, StoragePowerCodeCid, StorageMinerCodeCid, StorageMiner2CodeCid, AccountCodeCid, InitCodeCid, MultisigCodeCid, PaymentChannelCodeCid:
 		return true
 	default:
 		return false
diff --git a/chain/actors/actor_storagepower.go b/chain/actors/actor_storagepower.go
index 4a62a118f..4bd5a0cb7 100644
--- a/chain/actors/actor_storagepower.go
+++ b/chain/actors/actor_storagepower.go
@@ -85,7 +85,13 @@ func (spa StoragePowerActor) CreateStorageMiner(act *types.Actor, vmctx types.VM
 		return nil, aerrors.Newf(1, "not enough funds passed to cover required miner collateral (needed %s, got %s)", reqColl, vmctx.Message().Value)
 	}
 
-	encoded, err := CreateExecParams(StorageMinerCodeCid, &StorageMinerConstructorParams{
+	// FORK
+	minerCid := StorageMinerCodeCid
+	if vmctx.BlockHeight() > build.ForkFrigidHeight {
+		minerCid = StorageMiner2CodeCid
+	}
+
+	encoded, err := CreateExecParams(minerCid, &StorageMinerConstructorParams{
 		Owner:      params.Owner,
 		Worker:     params.Worker,
 		SectorSize: params.SectorSize,
diff --git a/chain/stmgr/forks.go b/chain/stmgr/forks.go
index 78b85e840..96bc173c6 100644
--- a/chain/stmgr/forks.go
+++ b/chain/stmgr/forks.go
@@ -18,11 +18,20 @@ func (sm *StateManager) handleStateForks(ctx context.Context, pstate cid.Cid, he
 	for i := parentH; i < height; i++ {
 		switch i {
 		case build.ForkBlizzardHeight:
+			log.Warnw("Executing blizzard fork logic", "height", i)
 			npstate, err := fixBlizzardAMTBug(ctx, sm, pstate)
 			if err != nil {
 				return cid.Undef, xerrors.Errorf("blizzard bug fix failed: %w", err)
 			}
 
+			return npstate, nil
+		case build.ForkFrigidHeight:
+			log.Warnw("Executing frigid fork logic", "height", i)
+			npstate, err := fixBlizzardAMTBug(ctx, sm, pstate)
+			if err != nil {
+				return cid.Undef, xerrors.Errorf("frigid bug fix failed: %w", err)
+			}
+
 			return npstate, nil
 		}
 	}
diff --git a/cmd/lotus-chainwatch/sync.go b/cmd/lotus-chainwatch/sync.go
index e851dbf9f..eac861aa8 100644
--- a/cmd/lotus-chainwatch/sync.go
+++ b/cmd/lotus-chainwatch/sync.go
@@ -221,7 +221,7 @@ func syncHead(ctx context.Context, api api.FullNode, st *storage, ts *types.TipS
 
 		for addr, m := range actors {
 			for actor, c := range m {
-				if actor.Code != actors2.StorageMinerCodeCid {
+				if !(actor.Code == actors2.StorageMinerCodeCid || actor.Code == actors2.StorageMiner2CodeCid) {
 					continue
 				}