diff --git a/chain/actors/builtin/miner/utils.go b/chain/actors/builtin/miner/utils.go
index f9c6b3da3..2f24e8454 100644
--- a/chain/actors/builtin/miner/utils.go
+++ b/chain/actors/builtin/miner/utils.go
@@ -4,6 +4,8 @@ import (
 	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/go-bitfield"
+	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/go-state-types/network"
 )
 
 func AllPartSectors(mas State, sget func(Partition) (bitfield.BitField, error)) (bitfield.BitField, error) {
@@ -26,3 +28,42 @@ func AllPartSectors(mas State, sget func(Partition) (bitfield.BitField, error))
 
 	return bitfield.MultiMerge(parts...)
 }
+
+// SealProofTypeFromSectorSize returns preferred seal proof type for creating
+// new miner actors and new sectors
+func SealProofTypeFromSectorSize(ssize abi.SectorSize, nv network.Version) (abi.RegisteredSealProof, error) {
+	switch {
+	case nv < network.Version7:
+		switch ssize {
+		case 2 << 10:
+			return abi.RegisteredSealProof_StackedDrg2KiBV1, nil
+		case 8 << 20:
+			return abi.RegisteredSealProof_StackedDrg8MiBV1, nil
+		case 512 << 20:
+			return abi.RegisteredSealProof_StackedDrg512MiBV1, nil
+		case 32 << 30:
+			return abi.RegisteredSealProof_StackedDrg32GiBV1, nil
+		case 64 << 30:
+			return abi.RegisteredSealProof_StackedDrg64GiBV1, nil
+		default:
+			return 0, xerrors.Errorf("unsupported sector size for miner: %v", ssize)
+		}
+	case nv >= network.Version7:
+		switch ssize {
+		case 2 << 10:
+			return abi.RegisteredSealProof_StackedDrg2KiBV1_1, nil
+		case 8 << 20:
+			return abi.RegisteredSealProof_StackedDrg8MiBV1_1, nil
+		case 512 << 20:
+			return abi.RegisteredSealProof_StackedDrg512MiBV1_1, nil
+		case 32 << 30:
+			return abi.RegisteredSealProof_StackedDrg32GiBV1_1, nil
+		case 64 << 30:
+			return abi.RegisteredSealProof_StackedDrg64GiBV1_1, nil
+		default:
+			return 0, xerrors.Errorf("unsupported sector size for miner: %v", ssize)
+		}
+	}
+
+	return 0, xerrors.Errorf("unsupported network version")
+}
diff --git a/chain/actors/version.go b/chain/actors/version.go
index fe16d521e..1cafa45c9 100644
--- a/chain/actors/version.go
+++ b/chain/actors/version.go
@@ -18,7 +18,7 @@ func VersionForNetwork(version network.Version) Version {
 	switch version {
 	case network.Version0, network.Version1, network.Version2, network.Version3:
 		return Version0
-	case network.Version4, network.Version5, network.Version6:
+	case network.Version4, network.Version5, network.Version6, network.Version7, network.Version8:
 		return Version2
 	default:
 		panic(fmt.Sprintf("unsupported network version %d", version))
diff --git a/cmd/lotus-seal-worker/main.go b/cmd/lotus-seal-worker/main.go
index 520964867..1f20bffbd 100644
--- a/cmd/lotus-seal-worker/main.go
+++ b/cmd/lotus-seal-worker/main.go
@@ -32,7 +32,6 @@ import (
 	"github.com/filecoin-project/lotus/build"
 	lcli "github.com/filecoin-project/lotus/cli"
 	sectorstorage "github.com/filecoin-project/lotus/extern/sector-storage"
-	"github.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper"
 	"github.com/filecoin-project/lotus/extern/sector-storage/sealtasks"
 	"github.com/filecoin-project/lotus/extern/sector-storage/stores"
 	"github.com/filecoin-project/lotus/lib/lotuslog"
@@ -356,11 +355,6 @@ var runCmd = &cli.Command{
 		}
 
 		// Setup remote sector store
-		spt, err := ffiwrapper.SealProofTypeFromSectorSize(ssize)
-		if err != nil {
-			return xerrors.Errorf("getting proof type: %w", err)
-		}
-
 		sminfo, err := lcli.GetAPIInfo(cctx, repo.StorageMiner)
 		if err != nil {
 			return xerrors.Errorf("could not get api info: %w", err)
@@ -374,7 +368,6 @@ var runCmd = &cli.Command{
 
 		workerApi := &worker{
 			LocalWorker: sectorstorage.NewLocalWorker(sectorstorage.WorkerConfig{
-				SealProof: spt,
 				TaskTypes: taskTypes,
 				NoSwap:    cctx.Bool("no-swap"),
 			}, remote, localStore, nodeApi, nodeApi, wsts),
diff --git a/cmd/lotus-storage-miner/init.go b/cmd/lotus-storage-miner/init.go
index a7fcd722a..008b2ea15 100644
--- a/cmd/lotus-storage-miner/init.go
+++ b/cmd/lotus-storage-miner/init.go
@@ -433,11 +433,6 @@ func storageMinerInit(ctx context.Context, cctx *cli.Context, api lapi.FullNode,
 				return err
 			}
 
-			spt, err := ffiwrapper.SealProofTypeFromSectorSize(ssize)
-			if err != nil {
-				return err
-			}
-
 			mid, err := address.IDFromAddress(a)
 			if err != nil {
 				return xerrors.Errorf("getting id address: %w", err)
@@ -451,9 +446,7 @@ func storageMinerInit(ctx context.Context, cctx *cli.Context, api lapi.FullNode,
 			wsts := statestore.New(namespace.Wrap(mds, modules.WorkerCallsPrefix))
 			smsts := statestore.New(namespace.Wrap(mds, modules.ManagerWorkPrefix))
 
-			smgr, err := sectorstorage.New(ctx, lr, stores.NewIndex(), &ffiwrapper.Config{
-				SealProofType: spt,
-			}, sectorstorage.SealerConfig{
+			smgr, err := sectorstorage.New(ctx, lr, stores.NewIndex(), sectorstorage.SealerConfig{
 				ParallelFetchLimit: 10,
 				AllowAddPiece:      true,
 				AllowPreCommit1:    true,
@@ -657,9 +650,14 @@ func createStorageMiner(ctx context.Context, api lapi.FullNode, peerid peer.ID,
 		}
 	}
 
-	spt, err := ffiwrapper.SealProofTypeFromSectorSize(abi.SectorSize(ssize))
+	nv, err := api.StateNetworkVersion(ctx, types.EmptyTSK)
 	if err != nil {
-		return address.Undef, err
+		return address.Undef, xerrors.Errorf("getting network version: %w", err)
+	}
+
+	spt, err := miner.SealProofTypeFromSectorSize(abi.SectorSize(ssize), nv)
+	if err != nil {
+		return address.Undef, xerrors.Errorf("getting seal proof type: %w", err)
 	}
 
 	params, err := actors.SerializeParams(&power2.CreateMinerParams{
diff --git a/extern/sector-storage/ffiwrapper/config.go b/extern/sector-storage/ffiwrapper/config.go
deleted file mode 100644
index a7669b8bd..000000000
--- a/extern/sector-storage/ffiwrapper/config.go
+++ /dev/null
@@ -1,24 +0,0 @@
-package ffiwrapper
-
-import (
-	"golang.org/x/xerrors"
-
-	"github.com/filecoin-project/go-state-types/abi"
-)
-
-func SealProofTypeFromSectorSizea(ssize abi.SectorSize) (abi.RegisteredSealProof, error) {
-	switch ssize {
-	case 2 << 10:
-		return abi.RegisteredSealProof_StackedDrg2KiBV1, nil
-	case 8 << 20:
-		return abi.RegisteredSealProof_StackedDrg8MiBV1, nil
-	case 512 << 20:
-		return abi.RegisteredSealProof_StackedDrg512MiBV1, nil
-	case 32 << 30:
-		return abi.RegisteredSealProof_StackedDrg32GiBV1, nil
-	case 64 << 30:
-		return abi.RegisteredSealProof_StackedDrg64GiBV1, nil
-	default:
-		return 0, xerrors.Errorf("unsupported sector size for miner: %v", ssize)
-	}
-}