diff --git a/api/api_full.go b/api/api_full.go
index 09c69a1ba..ceeceb05b 100644
--- a/api/api_full.go
+++ b/api/api_full.go
@@ -308,9 +308,9 @@ type FullNode interface {
 	// MsigGetAvailableBalance returns the portion of a multisig's balance that can be withdrawn or spent
 	MsigGetAvailableBalance(context.Context, address.Address, types.TipSetKey) (types.BigInt, error)
 	// MsigGetAvailableBalance creates a multisig wallet
-	// It takes the following params: <required number of senders>, <approving addresses>, <initial balance>,
-	// <sender address of the create msg>, <gas price>
-	MsigCreate(context.Context, int64, []address.Address, types.BigInt, address.Address, types.BigInt) (cid.Cid, error)
+	// It takes the following params: <required number of senders>, <approving addresses>, <unlock duration>
+	//<initial balance>, <sender address of the create msg>, <gas price>
+	MsigCreate(context.Context, int64, []address.Address, abi.ChainEpoch, types.BigInt, address.Address, types.BigInt) (cid.Cid, error)
 	// MsigPropose proposes a multisig message
 	// It takes the following params: <multisig address>, <recipient address>, <value to transfer>,
 	// <sender address of the propose msg>, <method to call in the proposed message>, <params to include in the proposed message>
diff --git a/api/apistruct/struct.go b/api/apistruct/struct.go
index db6e0b27b..d3b109666 100644
--- a/api/apistruct/struct.go
+++ b/api/apistruct/struct.go
@@ -158,7 +158,7 @@ type FullNodeStruct struct {
 		StateCompute                      func(context.Context, abi.ChainEpoch, []*types.Message, types.TipSetKey) (*api.ComputeStateOutput, error)           `perm:"read"`
 
 		MsigGetAvailableBalance func(context.Context, address.Address, types.TipSetKey) (types.BigInt, error)                                                                    `perm:"read"`
-		MsigCreate              func(context.Context, int64, []address.Address, types.BigInt, address.Address, types.BigInt) (cid.Cid, error)                                    `perm:"sign"`
+		MsigCreate              func(context.Context, int64, []address.Address, abi.ChainEpoch, types.BigInt, address.Address, types.BigInt) (cid.Cid, error)                    `perm:"sign"`
 		MsigPropose             func(context.Context, address.Address, address.Address, types.BigInt, address.Address, uint64, []byte) (cid.Cid, error)                          `perm:"sign"`
 		MsigApprove             func(context.Context, address.Address, uint64, address.Address, address.Address, types.BigInt, address.Address, uint64, []byte) (cid.Cid, error) `perm:"sign"`
 		MsigCancel              func(context.Context, address.Address, uint64, address.Address, address.Address, types.BigInt, address.Address, uint64, []byte) (cid.Cid, error) `perm:"sign"`
@@ -692,8 +692,8 @@ func (c *FullNodeStruct) MsigGetAvailableBalance(ctx context.Context, a address.
 	return c.Internal.MsigGetAvailableBalance(ctx, a, tsk)
 }
 
-func (c *FullNodeStruct) MsigCreate(ctx context.Context, req int64, addrs []address.Address, val types.BigInt, src address.Address, gp types.BigInt) (cid.Cid, error) {
-	return c.Internal.MsigCreate(ctx, req, addrs, val, src, gp)
+func (c *FullNodeStruct) MsigCreate(ctx context.Context, req int64, addrs []address.Address, duration abi.ChainEpoch, val types.BigInt, src address.Address, gp types.BigInt) (cid.Cid, error) {
+	return c.Internal.MsigCreate(ctx, req, addrs, duration, val, src, gp)
 }
 
 func (c *FullNodeStruct) MsigPropose(ctx context.Context, msig address.Address, to address.Address, amt types.BigInt, src address.Address, method uint64, params []byte) (cid.Cid, error) {
diff --git a/build/version.go b/build/version.go
index b5d48eac7..26f3bed41 100644
--- a/build/version.go
+++ b/build/version.go
@@ -53,7 +53,7 @@ func (ve Version) EqMajorMinor(v2 Version) bool {
 }
 
 // APIVersion is a semver version of the rpc api exposed
-var APIVersion Version = newVer(0, 5, 0)
+var APIVersion Version = newVer(0, 6, 0)
 
 //nolint:varcheck,deadcode
 const (
diff --git a/cli/multisig.go b/cli/multisig.go
index 9de881d95..125942054 100644
--- a/cli/multisig.go
+++ b/cli/multisig.go
@@ -6,6 +6,7 @@ import (
 	"encoding/binary"
 	"encoding/hex"
 	"fmt"
+	"github.com/filecoin-project/specs-actors/actors/abi"
 	"os"
 	"sort"
 	"strconv"
@@ -57,6 +58,11 @@ var msigCreateCmd = &cli.Command{
 			Usage: "initial funds to give to multisig",
 			Value: "0",
 		},
+		&cli.StringFlag{
+			Name:  "duration",
+			Usage: "length of the period over which funds unlock",
+			Value: "0",
+		},
 		&cli.StringFlag{
 			Name:  "from",
 			Usage: "account to send the create message from",
@@ -114,9 +120,11 @@ var msigCreateCmd = &cli.Command{
 			required = int64(len(addrs))
 		}
 
+		d := abi.ChainEpoch(cctx.Uint64("duration"))
+
 		gp := types.NewInt(1)
 
-		msgCid, err := api.MsigCreate(ctx, required, addrs, intVal, sendAddr, gp)
+		msgCid, err := api.MsigCreate(ctx, required, addrs, d, intVal, sendAddr, gp)
 		if err != nil {
 			return err
 		}
diff --git a/node/impl/full/multisig.go b/node/impl/full/multisig.go
index 65e64e22f..2fe123621 100644
--- a/node/impl/full/multisig.go
+++ b/node/impl/full/multisig.go
@@ -26,7 +26,7 @@ type MsigAPI struct {
 	MpoolAPI  MpoolAPI
 }
 
-func (a *MsigAPI) MsigCreate(ctx context.Context, req int64, addrs []address.Address, val types.BigInt, src address.Address, gp types.BigInt) (cid.Cid, error) {
+func (a *MsigAPI) MsigCreate(ctx context.Context, req int64, addrs []address.Address, duration abi.ChainEpoch, val types.BigInt, src address.Address, gp types.BigInt) (cid.Cid, error) {
 
 	lenAddrs := int64(len(addrs))
 
@@ -50,6 +50,7 @@ func (a *MsigAPI) MsigCreate(ctx context.Context, req int64, addrs []address.Add
 	msigParams := &samsig.ConstructorParams{
 		Signers:               addrs,
 		NumApprovalsThreshold: req,
+		UnlockDuration:        duration,
 	}
 
 	enc, actErr := actors.SerializeParams(msigParams)