diff --git a/chain/gen/genesis/genesis.go b/chain/gen/genesis/genesis.go
index 80c49efa1..ac22b5b19 100644
--- a/chain/gen/genesis/genesis.go
+++ b/chain/gen/genesis/genesis.go
@@ -407,7 +407,7 @@ func VerifyPreSealedData(ctx context.Context, cs *store.ChainStore, stateroot ci
 	var sum abi.PaddedPieceSize
 
 	nwv := func(context.Context, abi.ChainEpoch) runtime.NetworkVersion {
-		return runtime.NetworkVersion0
+		return runtime.NetworkVersion1
 	}
 
 	vmopt := vm.VMOpts{
diff --git a/chain/gen/genesis/miners.go b/chain/gen/genesis/miners.go
index 98fa3d72b..d8441c66c 100644
--- a/chain/gen/genesis/miners.go
+++ b/chain/gen/genesis/miners.go
@@ -62,7 +62,7 @@ func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sroot cid.Cid
 	}
 
 	nwv := func(context.Context, abi.ChainEpoch) runtime.NetworkVersion {
-		return runtime.NetworkVersion0
+		return runtime.NetworkVersion1
 	}
 
 	vmopt := &vm.VMOpts{
diff --git a/chain/stmgr/stmgr.go b/chain/stmgr/stmgr.go
index 660d4c6a4..5679991ae 100644
--- a/chain/stmgr/stmgr.go
+++ b/chain/stmgr/stmgr.go
@@ -1125,7 +1125,11 @@ func (sm *StateManager) GetCirculatingSupply(ctx context.Context, height abi.Cha
 }
 
 func (sm *StateManager) GetNtwkVersion(ctx context.Context, height abi.ChainEpoch) runtime.NetworkVersion {
-	if build.UpgradeBreezeHeight == 0 || height <= build.UpgradeBreezeHeight {
+	if build.UpgradeBreezeHeight == 0 {
+		return runtime.NetworkVersion1
+	}
+
+	if height <= build.UpgradeBreezeHeight {
 		return runtime.NetworkVersion0
 	}