diff --git a/ape_arbitrum/ecosystem.py b/ape_arbitrum/ecosystem.py
index 6e8bb62..6693137 100644
--- a/ape_arbitrum/ecosystem.py
+++ b/ape_arbitrum/ecosystem.py
@@ -23,6 +23,7 @@
     # chain_id, network_id
     "mainnet": (42161, 42161),
     "goerli": (421613, 421613),
+    "sepolia": (421614, 421614),
 }
 INTERNAL_TRANSACTION_TYPE = 106
 
@@ -118,6 +119,8 @@ class ArbitrumConfig(PluginConfig):
     mainnet_fork: NetworkConfig = _create_local_config()
     goerli: NetworkConfig = _create_network_config()
     goerli_fork: NetworkConfig = _create_local_config()
+    sepolia: NetworkConfig = _create_network_config()
+    sepolia_fork: NetworkConfig = _create_local_config()
     local: NetworkConfig = _create_local_config(default_provider="test")
     default_network: str = LOCAL_NETWORK_NAME
 
diff --git a/tests/test_integration.py b/tests/test_integration.py
index 58ce90d..eaf3070 100644
--- a/tests/test_integration.py
+++ b/tests/test_integration.py
@@ -8,6 +8,8 @@
 │   └── geth  (default)
 ├── goerli
 │   └── geth  (default)
+├── sepolia
+│   └── geth  (default)
 └── local  (default)
     └── test  (default)
 """.strip()
@@ -48,6 +50,7 @@ def test_networks(runner, cli, arbitrum):
     # Do this in case local env changed it.
     arbitrum.mainnet.set_default_provider("geth")
     arbitrum.goerli.set_default_provider("geth")
+    arbitrum.sepolia.set_default_provider("geth")
 
     result = runner.invoke(cli, ["networks", "list"])
     assert_rich_text(result.output, EXPECTED_OUTPUT)