diff --git a/setup.cfg b/setup.cfg
index 70d445a..6ad26d4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -80,6 +80,7 @@ testing =
     pytest-cov
     pytest-mock
     pytest-recording
+    responses
     setuptools
     web3[tester]==7.*
 
diff --git a/src/ethproto/wrappers.py b/src/ethproto/wrappers.py
index 4316012..89b9417 100644
--- a/src/ethproto/wrappers.py
+++ b/src/ethproto/wrappers.py
@@ -17,7 +17,7 @@
 
 ETHERSCAN_TOKEN = env.str("ETHERSCAN_TOKEN", None)
 ETHERSCAN_DOMAIN = env.str("ETHERSCAN_DOMAIN", "api.etherscan.io")
-ETHERSCAN_URL = env.str("ETHERSCAN_URL", "https://{domain}/api?apikey={token}&")
+ETHERSCAN_URL = env.str("ETHERSCAN_URL", "https://{domain}/v2/api?apikey={token}&chainid={chainid}&")
 AMOUNT_DECIMALS = env.int("AMOUNT_DECIMALS", 18)
 AMOUNT_CLASSNAME = env.str("AMOUNT_CLASSNAME", None)
 
@@ -266,7 +266,9 @@ def get_events(self, eth_wrapper, event_name, filter_kwargs={}):
     def get_etherscan_url(self):
         if ETHERSCAN_TOKEN is None:
             return None
-        return ETHERSCAN_URL.format(token=ETHERSCAN_TOKEN, domain=ETHERSCAN_DOMAIN)
+        return ETHERSCAN_URL.format(
+            token=ETHERSCAN_TOKEN, domain=ETHERSCAN_DOMAIN, chainid=self.w3.eth.chain_id
+        )
 
     def get_first_block(self, eth_wrapper):
         etherscan_url = self.get_etherscan_url()
@@ -275,7 +277,7 @@ def get_first_block(self, eth_wrapper):
         address = self.get_contract_address(eth_wrapper)
         url = (
             etherscan_url
-            + f"&module=account&action=txlist&address={address}&startblock=0&"
+            + f"module=account&action=txlist&address={address}&startblock=0&"
             + "endblock=99999999&page=1&offset=10&sort=asc"
         )
         resp = requests.get(url)
diff --git a/tests/test_w3.py b/tests/test_w3.py
index 0dee479..dffe357 100644
--- a/tests/test_w3.py
+++ b/tests/test_w3.py
@@ -1,6 +1,9 @@
+import importlib
 import os
+import sys
 
 import pytest
+import responses
 from web3 import Web3
 
 from ethproto import w3wrappers, wrappers
@@ -11,6 +14,28 @@
 ]
 
 
+@pytest.fixture
+def provider_with_etherscan_env(mocker):
+    mocker.patch.dict(
+        os.environ,
+        {"ETHERSCAN_TOKEN": "abc123", "ETHERSCAN_DOMAIN": "api.etherscan.io"},
+    )
+    sys.modules.pop("ethproto.wrappers", None)
+    sys.modules.pop("ethproto.w3wrappers", None)
+    wrappers = importlib.import_module("ethproto.wrappers")
+    w3wrappers = importlib.import_module("ethproto.w3wrappers")
+
+    w3wrappers.register_w3_provider("w3_test", Web3(Web3.EthereumTesterProvider()))
+    provider = wrappers.get_provider("w3_test")
+
+    return provider
+
+
+class DummyWrapper:
+    address = "0x8e3aab1fc53e8b0f5d987c20b1899a2db3b2f95c"  # random generated address
+    contract = type("Contract", (), {"address": address})()
+
+
 class Counter(wrappers.ETHWrapper):
     eth_contract = "Counter"
     # libraries_required = []
@@ -182,3 +207,29 @@ def test_sign_and_send_interact_with_existing_contract(sign_and_send):
     assert connected.value() == 1
 
     assert counter.value() == 1  # sanity check
+
+
+def test_get_etherscan_url_v2_format(provider_with_etherscan_env):
+    provider = provider_with_etherscan_env
+    chainid = provider.w3.eth.chain_id
+    assert provider.get_etherscan_url() == f"https://api.etherscan.io/v2/api?apikey=abc123&chainid={chainid}&"
+
+
+@responses.activate
+def test_get_first_block_makes_request(provider_with_etherscan_env):
+    provider = provider_with_etherscan_env
+    address = "0x8e3aab1fc53e8b0f5d987c20b1899a2db3b2f95c"
+    chainid = provider.w3.eth.chain_id
+    responses.get(
+        f"https://api.etherscan.io/v2/api?apikey=abc123&chainid={chainid}&"
+        f"&module=account&action=txlist&address={address}&startblock=0&"
+        "endblock=99999999&page=1&offset=10&sort=asc",
+        json={"status": "1", "message": "OK", "result": [{"blockNumber": "1"}]},
+        status=200,
+    )
+
+    block = provider.get_first_block(DummyWrapper())
+    assert block == 1
+
+    assert len(responses.calls) == 1
+    assert responses.calls[0].request.url.startswith("https://api.etherscan.io")