diff --git a/build/params_mainnet.go b/build/params_mainnet.go
index ea4ae7d75..fe25b3745 100644
--- a/build/params_mainnet.go
+++ b/build/params_mainnet.go
@@ -8,12 +8,10 @@
 package build
 
 import (
-	"math"
 	"os"
 
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
-	"github.com/filecoin-project/lotus/chain/actors/policy"
 	builtin2 "github.com/filecoin-project/specs-actors/v2/actors/builtin"
 )
 
@@ -54,29 +52,19 @@ const UpgradeOrangeHeight = 336458
 const UpgradeClausHeight = 343200
 
 // 2021-03-04T00:00:30Z
-var UpgradeActorsV3Height = abi.ChainEpoch(550321)
+const UpgradeActorsV3Height = 550321
 
 // 2021-04-12T22:00:00Z
 const UpgradeNorwegianHeight = 665280
 
 // 2021-04-29T06:00:00Z
-var UpgradeActorsV4Height = abi.ChainEpoch(712320)
+const UpgradeActorsV4Height = 712320
 
 func init() {
-	policy.SetConsensusMinerMinPower(abi.NewStoragePower(10 << 40))
-
 	if os.Getenv("LOTUS_USE_TEST_ADDRESSES") != "1" {
 		SetAddressNetwork(address.Mainnet)
 	}
 
-	if os.Getenv("LOTUS_DISABLE_V3_ACTOR_MIGRATION") == "1" {
-		UpgradeActorsV3Height = math.MaxInt64
-	}
-
-	if os.Getenv("LOTUS_DISABLE_V4_ACTOR_MIGRATION") == "1" {
-		UpgradeActorsV4Height = math.MaxInt64
-	}
-
 	Devnet = false
 
 	BuildType = BuildMainnet
diff --git a/go.mod b/go.mod
index 9c47ec848..da658267a 100644
--- a/go.mod
+++ b/go.mod
@@ -44,10 +44,10 @@ require (
 	github.com/filecoin-project/go-statemachine v0.0.0-20200925024713-05bd7c71fbfe
 	github.com/filecoin-project/go-statestore v0.1.1
 	github.com/filecoin-project/go-storedcounter v0.0.0-20200421200003-1c99c62e8a5b
-	github.com/filecoin-project/specs-actors v0.9.13
-	github.com/filecoin-project/specs-actors/v2 v2.3.5-0.20210114162132-5b58b773f4fb
-	github.com/filecoin-project/specs-actors/v3 v3.1.0
-	github.com/filecoin-project/specs-actors/v4 v4.0.0
+	github.com/filecoin-project/specs-actors v0.9.14
+	github.com/filecoin-project/specs-actors/v2 v2.3.5
+	github.com/filecoin-project/specs-actors/v3 v3.1.1
+	github.com/filecoin-project/specs-actors/v4 v4.0.1
 	github.com/filecoin-project/specs-storage v0.1.1-0.20201105051918-5188d9774506
 	github.com/filecoin-project/test-vectors/schema v0.0.5
 	github.com/gbrlsnchs/jwt/v3 v3.0.0-beta.1
diff --git a/go.sum b/go.sum
index f26f4f931..fab5b0dac 100644
--- a/go.sum
+++ b/go.sum
@@ -310,14 +310,20 @@ github.com/filecoin-project/specs-actors v0.9.4/go.mod h1:BStZQzx5x7TmCkLv0Bpa07
 github.com/filecoin-project/specs-actors v0.9.12/go.mod h1:TS1AW/7LbG+615j4NsjMK1qlpAwaFsG9w0V2tg2gSao=
 github.com/filecoin-project/specs-actors v0.9.13 h1:rUEOQouefi9fuVY/2HOroROJlZbOzWYXXeIh41KF2M4=
 github.com/filecoin-project/specs-actors v0.9.13/go.mod h1:TS1AW/7LbG+615j4NsjMK1qlpAwaFsG9w0V2tg2gSao=
+github.com/filecoin-project/specs-actors v0.9.14 h1:68PVstg2UB3ZsMLF+DKFTAs/YKsqhKWynkr0IqmVRQY=
+github.com/filecoin-project/specs-actors v0.9.14/go.mod h1:TS1AW/7LbG+615j4NsjMK1qlpAwaFsG9w0V2tg2gSao=
 github.com/filecoin-project/specs-actors/v2 v2.0.1/go.mod h1:v2NZVYinNIKA9acEMBm5wWXxqv5+frFEbekBFemYghY=
 github.com/filecoin-project/specs-actors/v2 v2.3.2/go.mod h1:UuJQLoTx/HPvvWeqlIFmC/ywlOLHNe8SNQ3OunFbu2Y=
 github.com/filecoin-project/specs-actors/v2 v2.3.5-0.20210114162132-5b58b773f4fb h1:orr/sMzrDZUPAveRE+paBdu1kScIUO5zm+HYeh+VlhA=
 github.com/filecoin-project/specs-actors/v2 v2.3.5-0.20210114162132-5b58b773f4fb/go.mod h1:LljnY2Mn2homxZsmokJZCpRuhOPxfXhvcek5gWkmqAc=
+github.com/filecoin-project/specs-actors/v2 v2.3.5 h1:PbT4tPlSXZ8sRgajhb4D8AOEmiaaZ+jg6tc6BBv8VQc=
+github.com/filecoin-project/specs-actors/v2 v2.3.5/go.mod h1:LljnY2Mn2homxZsmokJZCpRuhOPxfXhvcek5gWkmqAc=
 github.com/filecoin-project/specs-actors/v3 v3.1.0 h1:s4qiPw8pgypqBGAy853u/zdZJ7K9cTZdM1rTiSonHrg=
 github.com/filecoin-project/specs-actors/v3 v3.1.0/go.mod h1:mpynccOLlIRy0QnR008BwYBwT9fen+sPR13MA1VmMww=
-github.com/filecoin-project/specs-actors/v4 v4.0.0 h1:vMALksY5G3J5rj3q9rbcyB+f4Tk1xrLqSgdB3jOok4s=
-github.com/filecoin-project/specs-actors/v4 v4.0.0/go.mod h1:TkHXf/l7Wyw4ZejyXIPS2rK8bBO0rdwhTZyQQgaglng=
+github.com/filecoin-project/specs-actors/v3 v3.1.1 h1:BE8fsns1GnEOxt1DTE5LxBK2FThXtWmCChgcJoHTg0E=
+github.com/filecoin-project/specs-actors/v3 v3.1.1/go.mod h1:mpynccOLlIRy0QnR008BwYBwT9fen+sPR13MA1VmMww=
+github.com/filecoin-project/specs-actors/v4 v4.0.1 h1:AiWrtvJZ63MHGe6rn7tPu4nSUY8bA1KDNszqJaD5+Fg=
+github.com/filecoin-project/specs-actors/v4 v4.0.1/go.mod h1:TkHXf/l7Wyw4ZejyXIPS2rK8bBO0rdwhTZyQQgaglng=
 github.com/filecoin-project/specs-storage v0.1.1-0.20201105051918-5188d9774506 h1:Ur/l2+6qN+lQiqjozWWc5p9UDaAMDZKTlDS98oRnlIw=
 github.com/filecoin-project/specs-storage v0.1.1-0.20201105051918-5188d9774506/go.mod h1:nJRRM7Aa9XVvygr3W9k6xGF46RWzr2zxF/iGoAIfA/g=
 github.com/filecoin-project/test-vectors/schema v0.0.5 h1:w3zHQhzM4pYxJDl21avXjOKBLF8egrvwUwjpT8TquDg=