diff --git a/deposit_contract/contracts/validator_registration.json b/deposit_contract/contracts/validator_registration.json
index aeba08f..7af1cb1 100644
--- a/deposit_contract/contracts/validator_registration.json
+++ b/deposit_contract/contracts/validator_registration.json
@@ -1 +1 @@
-{"abi": [{"name": "Deposit", "inputs": [{"type": "bytes32", "name": "deposit_root", "indexed": false}, {"type": "bytes", "name": "data", "indexed": false}, {"type": "bytes", "name": "merkle_tree_index", "indexed": false}, {"type": "bytes32[32]", "name": "branch", "indexed": false}], "anonymous": false, "type": "event"}, {"name": "ChainStart", "inputs": [{"type": "bytes32", "name": "deposit_root", "indexed": false}, {"type": "bytes", "name": "time", "indexed": false}], "anonymous": false, "type": "event"}, {"name": "__init__", "outputs": [], "inputs": [], "constant": false, "payable": false, "type": "constructor"}, {"name": "to_little_endian_64", "outputs": [{"type": "bytes", "name": "out"}], "inputs": [{"type": "uint256", "name": "value"}], "constant": true, "payable": false, "type": "function", "gas": 15330}, {"name": "get_deposit_root", "outputs": [{"type": "bytes32", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 30835}, {"name": "deposit", "outputs": [], "inputs": [{"type": "bytes", "name": "deposit_input"}], "constant": false, "payable": true, "type": "function", "gas": 461131}, {"name": "chainStarted", "outputs": [{"type": "bool", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 603}], "bytecode": 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\ No newline at end of file
+{"abi": [{"name": "Deposit", "inputs": [{"type": "bytes32", "name": "deposit_root", "indexed": false}, {"type": "bytes", "name": "data", "indexed": false}, {"type": "bytes", "name": "merkle_tree_index", "indexed": false}, {"type": "bytes32[32]", "name": "branch", "indexed": false}], "anonymous": false, "type": "event"}, {"name": "Eth2Genesis", "inputs": [{"type": "bytes32", "name": "deposit_root", "indexed": false}, {"type": "bytes", "name": "time", "indexed": false}], "anonymous": false, "type": "event"}, {"name": "__init__", "outputs": [], "inputs": [], "constant": false, "payable": false, "type": "constructor"}, {"name": "to_little_endian_64", "outputs": [{"type": "bytes", "name": "out"}], "inputs": [{"type": "uint256", "name": "value"}], "constant": true, "payable": false, "type": "function", "gas": 15330}, {"name": "get_deposit_root", "outputs": [{"type": "bytes32", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 30835}, {"name": "deposit", "outputs": [], "inputs": [{"type": "bytes", "name": "deposit_input"}], "constant": false, "payable": true, "type": "function", "gas": 461131}, {"name": "chainStarted", "outputs": [{"type": "bool", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 603}], "bytecode": 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\ No newline at end of file
diff --git a/deposit_contract/contracts/validator_registration.v.py b/deposit_contract/contracts/validator_registration.v.py
index 724657c..a6ae27e 100644
--- a/deposit_contract/contracts/validator_registration.v.py
+++ b/deposit_contract/contracts/validator_registration.v.py
@@ -6,7 +6,7 @@
 MAX_64_BIT_VALUE: constant(uint256) = 18446744073709551615  # 2**64 - 1
 
 Deposit: event({deposit_root: bytes32, data: bytes[528], merkle_tree_index: bytes[8], branch: bytes32[DEPOSIT_TREE_DEPTH]})
-ChainStart: event({deposit_root: bytes32, time: bytes[8]})
+Eth2Genesis: event({deposit_root: bytes32, time: bytes[8]})
 
 zerohashes: bytes32[DEPOSIT_TREE_DEPTH]
 branch: bytes32[DEPOSIT_TREE_DEPTH]
@@ -90,5 +90,5 @@ def deposit(deposit_input: bytes[512]):
         self.full_deposit_count += 1
         if self.full_deposit_count == CHAIN_START_FULL_DEPOSIT_THRESHOLD:
             timestamp_day_boundary: uint256 = as_unitless_number(block.timestamp) - as_unitless_number(block.timestamp) % SECONDS_PER_DAY + SECONDS_PER_DAY
-            log.ChainStart(new_deposit_root, self.to_little_endian_64(timestamp_day_boundary))
+            log.Eth2Genesis(new_deposit_root, self.to_little_endian_64(timestamp_day_boundary))
             self.chainStarted = True
diff --git a/tests/contracts/test_deposit.py b/tests/contracts/test_deposit.py
index 550a7a0..ffb10c5 100644
--- a/tests/contracts/test_deposit.py
+++ b/tests/contracts/test_deposit.py
@@ -130,7 +130,7 @@ def test_chain_start(modified_registration_contract, w3, assert_tx_failed):
     # CHAIN_START_FULL_DEPOSIT_THRESHOLD is set to t
     min_deposit_amount = MIN_DEPOSIT_AMOUNT * eth_utils.denoms.gwei  # in wei
     max_deposit_amount = MAX_DEPOSIT_AMOUNT * eth_utils.denoms.gwei
-    log_filter = modified_registration_contract.events.ChainStart.createFilter(
+    log_filter = modified_registration_contract.events.Eth2Genesis.createFilter(
         fromBlock='latest',
     )
 
@@ -143,7 +143,7 @@ def test_chain_start(modified_registration_contract, w3, assert_tx_failed):
                 deposit_input,
             ).transact({"value": min_deposit_amount})
             logs = log_filter.get_new_entries()
-            # ChainStart event should not be triggered
+            # Eth2Genesis event should not be triggered
             assert len(logs) == 0
         else:
             # Deposit with value MAX_DEPOSIT_AMOUNT
@@ -152,10 +152,10 @@ def test_chain_start(modified_registration_contract, w3, assert_tx_failed):
                 deposit_input,
             ).transact({"value": max_deposit_amount})
             logs = log_filter.get_new_entries()
-            # ChainStart event should not be triggered
+            # Eth2Genesis event should not be triggered
             assert len(logs) == 0
 
-    # Make 1 more deposit with value MAX_DEPOSIT_AMOUNT to trigger ChainStart event
+    # Make 1 more deposit with value MAX_DEPOSIT_AMOUNT to trigger Eth2Genesis event
     deposit_input = b'\x06' * 512
     modified_registration_contract.functions.deposit(
         deposit_input,
@@ -169,7 +169,7 @@ def test_chain_start(modified_registration_contract, w3, assert_tx_failed):
     assert int.from_bytes(log['time'], byteorder='little') == timestamp_day_boundary
     assert modified_registration_contract.functions.chainStarted().call() is True
 
-    # Make 1 deposit with value MAX_DEPOSIT_AMOUNT and check that ChainStart event is not triggered
+    # Make 1 deposit with value MAX_DEPOSIT_AMOUNT and check that Eth2Genesis event is not triggered
     deposit_input = b'\x07' * 512
     modified_registration_contract.functions.deposit(
         deposit_input,