diff --git a/beacon_chain/deploy_deposit_contract.nim b/beacon_chain/deploy_deposit_contract.nim
index e89b13c10..092a15939 100644
--- a/beacon_chain/deploy_deposit_contract.nim
+++ b/beacon_chain/deploy_deposit_contract.nim
@@ -7,7 +7,8 @@ import
 import json_rpc/rpcclient
 import web3/stintjson, json
 
-const contractCode = "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+# https://github.com/ethereum/eth2.0-specs/blob/master/deposit_contract/contracts/validator_registration.v.py as of 12dff5349df00d22af0f8897bca1bd114f65cdbd
+const contractCode = "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
 proc deployContract*(web3: Web3, code: string): Future[Address] {.async.} =
   let provider = web3.provider
diff --git a/beacon_chain/genesis.nim b/beacon_chain/genesis.nim
index 6c2a66c12..8adf5e980 100644
--- a/beacon_chain/genesis.nim
+++ b/beacon_chain/genesis.nim
@@ -3,7 +3,7 @@ import conf, chronos, web3, json_rpc/rpcclient, json,
 
 contract(DepositContract):
   proc deposit(pubkey: Bytes48, withdrawalCredentials: Bytes32, signature: Bytes96)
-  proc Deposit(pubkey: Bytes48, withdrawalCredentials: Bytes32, amount: Bytes8, signature: Bytes96, merkleTreeIndex: Bytes8) {.event.}
+  proc DepositEvent(pubkey: Bytes48, withdrawalCredentials: Bytes32, amount: Bytes8, signature: Bytes96, index: Bytes8) {.event.}
 
 const MIN_GENESIS_TIME = 0
 
@@ -43,7 +43,7 @@ proc getGenesisFromEth1*(conf: BeaconNodeConf): Future[BeaconState] {.async.} =
   var deposits = DepositCollector()
   deposits.queue = newAsyncQueue[QueueElement]()
 
-  let s = await ns.subscribe(Deposit, %*{"fromBlock": "0x0"}) do(pubkey: Bytes48, withdrawalCredentials: Bytes32, amount: Bytes8, signature: Bytes96, merkleTreeIndex: Bytes8, j: JsonNode):
+  let s = await ns.subscribe(DepositEvent, %*{"fromBlock": "0x0"}) do(pubkey: Bytes48, withdrawalCredentials: Bytes32, amount: Bytes8, signature: Bytes96, merkleTreeIndex: Bytes8, j: JsonNode):
 
     let blkHash = BlockHash.fromHex(j["blockHash"].getStr())
     let amount = bytes_to_int(array[8, byte](amount))