diff --git a/build/params.go b/build/params.go
index 19611fb43..7c00f1920 100644
--- a/build/params.go
+++ b/build/params.go
@@ -28,7 +28,7 @@ const MaxVouchersPerDeal = 768 // roughly one voucher per 10h over a year
 // Consensus / Network
 
 // Seconds
-const BlockDelay = 3
+const BlockDelay = 6
 
 // Seconds
 const AllowableClockDrift = BlockDelay * 2
@@ -43,10 +43,10 @@ const ForkLengthThreshold = 20
 const RandomnessLookback = 20
 
 // Blocks
-const ProvingPeriodDuration = 10
+const ProvingPeriodDuration = 40
 
 // Blocks
-const PoSTChallangeTime = 5
+const PoSTChallangeTime = 20
 
 const PowerCollateralProportion = 20
 const PerCapitaCollateralProportion = 5
diff --git a/chain/gen/utils.go b/chain/gen/utils.go
index 9362a4083..f069da4a5 100644
--- a/chain/gen/utils.go
+++ b/chain/gen/utils.go
@@ -202,7 +202,7 @@ func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sroot cid.Cid
 
 		// TODO: hardcoding 7000000 here is a little fragile, it changes any
 		// time anyone changes the initial account allocations
-		rval, err := doExecValue(ctx, vm, actors.StorageMarketAddress, owner, types.NewInt(700000000), actors.SMAMethods.CreateStorageMiner, params)
+		rval, err := doExecValue(ctx, vm, actors.StorageMarketAddress, owner, types.NewInt(250000000000000000), actors.SMAMethods.CreateStorageMiner, params)
 		if err != nil {
 			return cid.Undef, xerrors.Errorf("failed to create genesis miner: %w", err)
 		}
diff --git a/cmd/lotus-fountain/main.go b/cmd/lotus-fountain/main.go
index efef52a40..1a9017b31 100644
--- a/cmd/lotus-fountain/main.go
+++ b/cmd/lotus-fountain/main.go
@@ -19,7 +19,7 @@ import (
 
 var log = logging.Logger("main")
 
-var sendPerRequest = types.NewInt(5_000_000)
+var sendPerRequest = types.NewInt(500_000_000)
 
 func main() {
 	logging.SetLogLevel("*", "INFO")
diff --git a/node/modules/testing/genesis.go b/node/modules/testing/genesis.go
index 5085ac4fc..3cbd8c9e2 100644
--- a/node/modules/testing/genesis.go
+++ b/node/modules/testing/genesis.go
@@ -76,7 +76,7 @@ func MakeGenesis(outFile string) func(bs dtypes.ChainBlockstore, w *wallet.Walle
 			}
 
 			addrs := map[address.Address]types.BigInt{
-				minerAddr: types.NewInt(5000000000),
+				minerAddr: types.NewInt(5000000000000000000),
 			}
 
 			b, err := gen.MakeGenesisBlock(bs, addrs, gmc, 100000)