diff --git a/api/api_full.go b/api/api_full.go
index 61a2ebc53..382611fbf 100644
--- a/api/api_full.go
+++ b/api/api_full.go
@@ -320,11 +320,11 @@ type MethodCall struct {
 }
 
 type StartDealParams struct {
-	Data           *storagemarket.DataRef
-	Wallet         address.Address
-	Miner          address.Address
-	EpochPrice     types.BigInt
-	BlocksDuration uint64
+	Data              *storagemarket.DataRef
+	Wallet            address.Address
+	Miner             address.Address
+	EpochPrice        types.BigInt
+	MinBlocksDuration uint64
 }
 
 type IpldObject struct {
diff --git a/api/test/deals.go b/api/test/deals.go
index 1d3baf138..47856446c 100644
--- a/api/test/deals.go
+++ b/api/test/deals.go
@@ -83,11 +83,11 @@ func TestDealFlow(t *testing.T, b APIBuilder, blocktime time.Duration, carExport
 		t.Fatal(err)
 	}
 	deal, err := client.ClientStartDeal(ctx, &api.StartDealParams{
-		Data:           &storagemarket.DataRef{Root: fcid},
-		Wallet:         addr,
-		Miner:          maddr,
-		EpochPrice:     types.NewInt(1000000),
-		BlocksDuration: 100,
+		Data:              &storagemarket.DataRef{Root: fcid},
+		Wallet:            addr,
+		Miner:             maddr,
+		EpochPrice:        types.NewInt(1000000),
+		MinBlocksDuration: 100,
 	})
 	if err != nil {
 		t.Fatalf("%+v", err)
diff --git a/cli/client.go b/cli/client.go
index 3ea509103..466630ac7 100644
--- a/cli/client.go
+++ b/cli/client.go
@@ -187,11 +187,11 @@ var clientDealCmd = &cli.Command{
 		}
 
 		proposal, err := api.ClientStartDeal(ctx, &lapi.StartDealParams{
-			Data:           ref,
-			Wallet:         a,
-			Miner:          miner,
-			EpochPrice:     types.BigInt(price),
-			BlocksDuration: uint64(dur),
+			Data:              ref,
+			Wallet:            a,
+			Miner:             miner,
+			EpochPrice:        types.BigInt(price),
+			MinBlocksDuration: uint64(dur),
 		})
 		if err != nil {
 			return err
diff --git a/go.mod b/go.mod
index 2a74e35bc..8a7187f96 100644
--- a/go.mod
+++ b/go.mod
@@ -25,7 +25,7 @@ require (
 	github.com/filecoin-project/go-paramfetch v0.0.2-0.20200218225740-47c639bab663
 	github.com/filecoin-project/go-statestore v0.1.0
 	github.com/filecoin-project/sector-storage v0.0.0-20200411000242-61616264b16d
-	github.com/filecoin-project/specs-actors v0.0.0-20200416120818-2fbe2e4dee24
+	github.com/filecoin-project/specs-actors v0.0.0-20200416213853-1bd9b52a4621
 	github.com/filecoin-project/specs-storage v0.0.0-20200410185809-9fbaaa08f275
 	github.com/filecoin-project/storage-fsm v0.0.0-20200415180041-afc45d4b6e8b
 	github.com/gbrlsnchs/jwt/v3 v3.0.0-beta.1
diff --git a/go.sum b/go.sum
index 8afdc159e..5b33dd424 100644
--- a/go.sum
+++ b/go.sum
@@ -190,6 +190,8 @@ github.com/filecoin-project/specs-actors v0.0.0-20200415170224-54c7b2a42e71 h1:k
 github.com/filecoin-project/specs-actors v0.0.0-20200415170224-54c7b2a42e71/go.mod h1:M2HNOBpYbgXl/V4GmJFOsY7lQNuAmOtrCQMa6Yfpfrc=
 github.com/filecoin-project/specs-actors v0.0.0-20200416120818-2fbe2e4dee24 h1:r/a/rs912gOE5Z5AzKJXa7jHu3asRt/cHO30odPTMoE=
 github.com/filecoin-project/specs-actors v0.0.0-20200416120818-2fbe2e4dee24/go.mod h1:qNIpwxs7WCtxbcbG4ZiS+Wf3qn36eyfqktlXJhi46X4=
+github.com/filecoin-project/specs-actors v0.0.0-20200416213853-1bd9b52a4621 h1:czpP1yymltKqEjCfQptXkn01rkkAqgf1nEmIPcRbO/I=
+github.com/filecoin-project/specs-actors v0.0.0-20200416213853-1bd9b52a4621/go.mod h1:qNIpwxs7WCtxbcbG4ZiS+Wf3qn36eyfqktlXJhi46X4=
 github.com/filecoin-project/specs-storage v0.0.0-20200410185809-9fbaaa08f275 h1:6OTcpsTQBQM0f/A67oEi4E4YtYd6fzkMqbU8cPIWMMs=
 github.com/filecoin-project/specs-storage v0.0.0-20200410185809-9fbaaa08f275/go.mod h1:xJ1/xl9+8zZeSSSFmDC3Wr6uusCTxyYPI0VeNVSFmPE=
 github.com/filecoin-project/storage-fsm v0.0.0-20200413200947-069c3b2468ca h1:TejufIAWDpEVqFUCszDpgOEzXBWuTVltsDQL/3F8Jxo=
diff --git a/markets/storageadapter/client.go b/markets/storageadapter/client.go
index 62f950755..0d3ca4e1e 100644
--- a/markets/storageadapter/client.go
+++ b/markets/storageadapter/client.go
@@ -172,7 +172,7 @@ func (c *ClientNodeAdapter) ValidatePublishedDeal(ctx context.Context, deal stor
 		return 0, xerrors.Errorf("getting deal pubsish message: %w", err)
 	}
 
-	mi, err := stmgr.StateMinerInfo(ctx, c.sm, nil, deal.Proposal.Provider)
+	mi, err := stmgr.StateMinerInfo(ctx, c.sm, c.cs.GetHeaviestTipSet(), deal.Proposal.Provider)
 	if err != nil {
 		return 0, xerrors.Errorf("getting miner worker failed: %w", err)
 	}
diff --git a/node/impl/client/client.go b/node/impl/client/client.go
index 47658bde3..8ab51463f 100644
--- a/node/impl/client/client.go
+++ b/node/impl/client/client.go
@@ -6,9 +6,6 @@ import (
 	"io"
 	"os"
 
-	"github.com/filecoin-project/sector-storage/ffiwrapper"
-
-	"github.com/filecoin-project/specs-actors/actors/abi/big"
 	"golang.org/x/xerrors"
 
 	"github.com/ipfs/go-blockservice"
@@ -29,7 +26,10 @@ import (
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-fil-markets/retrievalmarket"
 	"github.com/filecoin-project/go-fil-markets/storagemarket"
+	"github.com/filecoin-project/sector-storage/ffiwrapper"
 	"github.com/filecoin-project/specs-actors/actors/abi"
+	"github.com/filecoin-project/specs-actors/actors/abi/big"
+	"github.com/filecoin-project/specs-actors/actors/builtin/miner"
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
@@ -86,13 +86,16 @@ func (a *API) ClientStartDeal(ctx context.Context, params *api.StartDealParams)
 		return nil, xerrors.Errorf("failed getting chain height: %w", err)
 	}
 
+	exp := ts.Height()+dealStartBuffer+abi.ChainEpoch(params.MinBlocksDuration)
+	exp += miner.WPoStProvingPeriod - (exp % miner.WPoStProvingPeriod) + mi.ProvingPeriodBoundary - 1
+
 	result, err := a.SMDealClient.ProposeStorageDeal(
 		ctx,
 		params.Wallet,
 		&providerInfo,
 		params.Data,
 		ts.Height()+dealStartBuffer,
-		ts.Height()+dealStartBuffer+abi.ChainEpoch(params.BlocksDuration),
+		exp,
 		params.EpochPrice,
 		big.Zero(),
 		rt,