diff --git a/Makefile b/Makefile
index f91e74e3356..10645eb72af 100644
--- a/Makefile
+++ b/Makefile
@@ -362,4 +362,4 @@ print-%:
 	@echo $*=$($*)
 
 circleci:
-	go generate -x ./.circleci
\ No newline at end of file
+	go generate -x ./.circleci
diff --git a/build/bootstrap/interopnet.pi b/build/bootstrap/interopnet.pi
index 923653d94e3..1134180d8f8 100644
--- a/build/bootstrap/interopnet.pi
+++ b/build/bootstrap/interopnet.pi
@@ -1,2 +1,2 @@
-/dns4/bootstrap-0.interop.fildev.network/tcp/1347/p2p/12D3KooWLGPq9JL1xwL6gHok7HSNxtK1Q5kyfg4Hk69ifRPghn4i
-/dns4/bootstrap-1.interop.fildev.network/tcp/1347/p2p/12D3KooWFYS1f31zafv8mqqYu8U3hEqYvaZ6avWzYU3BmZdpyH3h
+/dns4/bootstrap-0.interop.fildev.network/tcp/1347/p2p/12D3KooWPfaWdJjpPTQp5kSqsqvauJaM4cFz5NWja7qyjx7vVfjL
+/dns4/bootstrap-1.interop.fildev.network/tcp/1347/p2p/12D3KooWS5tjcL6s4hHZ1HVRTgGKaXpKkiHfbBSJdjbzgejgJpEh
diff --git a/build/genesis/interopnet.car b/build/genesis/interopnet.car
index 2c7c2a49873..e2e7ef5fdf7 100644
Binary files a/build/genesis/interopnet.car and b/build/genesis/interopnet.car differ
diff --git a/build/params_interop.go b/build/params_interop.go
index a483e7188d5..4b0f41b6de7 100644
--- a/build/params_interop.go
+++ b/build/params_interop.go
@@ -13,13 +13,12 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/network"
 	"github.com/filecoin-project/lotus/chain/actors/policy"
-	builtin2 "github.com/filecoin-project/specs-actors/v2/actors/builtin"
 )
 
 const BootstrappersFile = "interopnet.pi"
 const GenesisFile = "interopnet.car"
 
-const GenesisNetworkVersion = network.Version13
+const GenesisNetworkVersion = network.Version15
 
 var UpgradeBreezeHeight = abi.ChainEpoch(-1)
 
@@ -54,14 +53,17 @@ var DrandSchedule = map[abi.ChainEpoch]DrandEnum{
 }
 
 func init() {
+	policy.SetMinVerifiedDealSize(abi.NewStoragePower(256))
+	policy.SetPreCommitChallengeDelay(abi.ChainEpoch(10))
+
+	InsecurePoStValidation = true
+
+	policy.SetConsensusMinerMinPower(abi.NewStoragePower(2 << 30))
 	policy.SetSupportedProofTypes(
-		abi.RegisteredSealProof_StackedDrg2KiBV1,
-		abi.RegisteredSealProof_StackedDrg8MiBV1,
 		abi.RegisteredSealProof_StackedDrg512MiBV1,
+		abi.RegisteredSealProof_StackedDrg32GiBV1,
+		abi.RegisteredSealProof_StackedDrg64GiBV1,
 	)
-	policy.SetConsensusMinerMinPower(abi.NewStoragePower(2048))
-	policy.SetMinVerifiedDealSize(abi.NewStoragePower(256))
-	policy.SetPreCommitChallengeDelay(abi.ChainEpoch(10))
 
 	getUpgradeHeight := func(ev string, def abi.ChainEpoch) abi.ChainEpoch {
 		hs, found := os.LookupEnv(ev)
@@ -93,6 +95,8 @@ func init() {
 	UpgradeNorwegianHeight = getUpgradeHeight("LOTUS_NORWEGIAN_HEIGHT", UpgradeNorwegianHeight)
 	UpgradeTurboHeight = getUpgradeHeight("LOTUS_ACTORSV4_HEIGHT", UpgradeTurboHeight)
 	UpgradeHyperdriveHeight = getUpgradeHeight("LOTUS_HYPERDRIVE_HEIGHT", UpgradeHyperdriveHeight)
+	UpgradeChocolateHeight = getUpgradeHeight("LOTUS_CHOCOLATE_HEIGHT", UpgradeChocolateHeight)
+	UpgradeOhSnapHeight = getUpgradeHeight("LOTUS_OHSNAP_HEIGHT", UpgradeOhSnapHeight)
 
 	BuildType |= BuildInteropnet
 	SetAddressNetwork(address.Testnet)
@@ -100,9 +104,9 @@ func init() {
 
 }
 
-const BlockDelaySecs = uint64(builtin2.EpochDurationSeconds)
+const BlockDelaySecs = uint64(5)
 
-const PropagationDelaySecs = uint64(6)
+const PropagationDelaySecs = uint64(1)
 
 // BootstrapPeerThreshold is the minimum number peers we need to track for a sync worker to start
 const BootstrapPeerThreshold = 2
diff --git a/extern/filecoin-ffi b/extern/filecoin-ffi
index c2668aa67ec..5216e96fd12 160000
--- a/extern/filecoin-ffi
+++ b/extern/filecoin-ffi
@@ -1 +1 @@
-Subproject commit c2668aa67ec589a773153022348b9c0ed6ed4d5d
+Subproject commit 5216e96fd12e5551a49c01e0d05b9f7626037da4