diff --git a/custom_components/ban_whitelist/__init__.py b/custom_components/ban_whitelist/__init__.py
index 07a5eba..9f7d032 100644
--- a/custom_components/ban_whitelist/__init__.py
+++ b/custom_components/ban_whitelist/__init__.py
@@ -23,7 +23,8 @@
                 vol.Required("ip_addresses"): vol.All(cv.ensure_list, [cv.string]),
             }
         )
-    }
+    },
+    extra=vol.ALLOW_EXTRA,
 )
 
 
diff --git a/stubs/voluptuous.pyi b/stubs/voluptuous.pyi
index 5603247..a67a9e9 100644
--- a/stubs/voluptuous.pyi
+++ b/stubs/voluptuous.pyi
@@ -3,7 +3,7 @@
 from typing import Any, Callable, List
 
 class Schema:
-    def __init__(self, config: dict) -> None: ...
+    def __init__(self, config: dict, extra: int | None = None) -> None: ...
 
 class Required:
     def __init__(self, name: str) -> None: ...
@@ -12,3 +12,5 @@ class All:
     def __init__(
         self, *args: List[Callable[[Any], Any]] | Callable[[Any], Any]
     ) -> None: ...
+
+ALLOW_EXTRA: int = ...
diff --git a/tests/ban_whitelist/test_setup.py b/tests/ban_whitelist/test_setup.py
index 315fb52..468ec22 100644
--- a/tests/ban_whitelist/test_setup.py
+++ b/tests/ban_whitelist/test_setup.py
@@ -17,7 +17,7 @@ async def test_setup(hass: HomeAssistant, caplog: pytest.LogCaptureFixture) -> N
     assert list((await async_get_custom_components(hass)).keys()) == ["ban_whitelist"]
     await async_setup_component(hass, "http", {})
     await async_setup_component(
-        hass, DOMAIN, {DOMAIN: {"ip_addresses": ["192.168.1.1"]}}
+        hass, DOMAIN, {DOMAIN: {"ip_addresses": ["192.168.1.1"]}, "foo": "bar"}
     )
 
     for record in caplog.records: