diff --git a/build/bootstrap/bootstrappers.pi b/build/bootstrap/bootstrappers.pi
index 1ab2c368a..61b7dede3 100644
--- a/build/bootstrap/bootstrappers.pi
+++ b/build/bootstrap/bootstrappers.pi
@@ -1,2 +1,12 @@
-/dns4/t01000.miner.interopnet.kittyhawk.wtf/tcp/1347/p2p/12D3KooWGzxzKZYveHXtpG6AsrUJBcWxHBFS2HsEoGTxrMLvKXtf
-/ip4/52.36.61.156/tcp/1347/p2p/12D3KooWFETiESTf1v4PGUvtnxMAcEFMzLZbJGg4tjWfGEimYior
+/dns4/bootstrap-0-sin.fil-test.net/tcp/1347/p2p/12D3KooWKNF7vNFEhnvB45E9mw2B5z6t419W3ziZPLdUDVnLLKGs
+/ip4/86.109.15.57/tcp/1347/p2p/12D3KooWKNF7vNFEhnvB45E9mw2B5z6t419W3ziZPLdUDVnLLKGs
+/dns4/bootstrap-0-dfw.fil-test.net/tcp/1347/p2p/12D3KooWECJTm7RUPyGfNbRwm6y2fK4wA7EB8rDJtWsq5AKi7iDr
+/ip4/139.178.84.45/tcp/1347/p2p/12D3KooWECJTm7RUPyGfNbRwm6y2fK4wA7EB8rDJtWsq5AKi7iDr
+/dns4/bootstrap-0-fra.fil-test.net/tcp/1347/p2p/12D3KooWC7MD6m7iNCuDsYtNr7xVtazihyVUizBbhmhEiyMAm9ym
+/ip4/136.144.49.17/tcp/1347/p2p/12D3KooWC7MD6m7iNCuDsYtNr7xVtazihyVUizBbhmhEiyMAm9ym
+/dns4/bootstrap-1-sin.fil-test.net/tcp/1347/p2p/12D3KooWD8eYqsKcEMFax6EbWN3rjA7qFsxCez2rmN8dWqkzgNaN
+/ip4/86.109.15.55/tcp/1347/p2p/12D3KooWD8eYqsKcEMFax6EbWN3rjA7qFsxCez2rmN8dWqkzgNaN
+/dns4/bootstrap-1-dfw.fil-test.net/tcp/1347/p2p/12D3KooWLB3RR8frLAmaK4ntHC2dwrAjyGzQgyUzWxAum1FxyyqD
+/ip4/139.178.84.41/tcp/1347/p2p/12D3KooWLB3RR8frLAmaK4ntHC2dwrAjyGzQgyUzWxAum1FxyyqD
+/dns4/bootstrap-1-fra.fil-test.net/tcp/1347/p2p/12D3KooWGPDJAw3HW4uVU3JEQBfFaZ1kdpg4HvvwRMVpUYbzhsLQ
+/ip4/136.144.49.131/tcp/1347/p2p/12D3KooWGPDJAw3HW4uVU3JEQBfFaZ1kdpg4HvvwRMVpUYbzhsLQ
diff --git a/build/genesis/devnet.car b/build/genesis/devnet.car
new file mode 100644
index 000000000..5f13410a6
Binary files /dev/null and b/build/genesis/devnet.car differ
diff --git a/build/params_testnet.go b/build/params_testnet.go
index 093564e6b..5d5e6b81f 100644
--- a/build/params_testnet.go
+++ b/build/params_testnet.go
@@ -12,11 +12,10 @@ import (
 )
 
 func init() {
-	power.ConsensusMinerMinPower = big.NewInt(2 << 30)
+	power.ConsensusMinerMinPower = big.NewInt(1024 << 30)
 	miner.SupportedProofTypes = map[abi.RegisteredProof]struct{}{
-		abi.RegisteredProof_StackedDRG512MiBSeal: {},
-		abi.RegisteredProof_StackedDRG32GiBSeal:  {},
-		abi.RegisteredProof_StackedDRG64GiBSeal:  {},
+		abi.RegisteredProof_StackedDRG32GiBSeal: {},
+		abi.RegisteredProof_StackedDRG64GiBSeal: {},
 	}
 }
 
diff --git a/cmd/lotus-fountain/site/miner.html b/cmd/lotus-fountain/site/miner.html
index 1fcbee34f..02aadc3d5 100644
--- a/cmd/lotus-fountain/site/miner.html
+++ b/cmd/lotus-fountain/site/miner.html
@@ -15,8 +15,7 @@
                 <span>Enter destination address:</span>
                 <input type='text' name='address' style="width: 300px">
                 <select name="sectorSize">
-                    <option selected value="536870912">512MiB sectors</option>
-                    <option value="34359738368">32GiB sectors</option>
+                    <option selected value="34359738368">32GiB sectors</option>
                     <option value="68719476736">64GiB sectors</option>
                 </select>
                 <button type='submit'>Create Miner</button>