diff --git a/src/philipstv/_data.py b/src/philipstv/_data.py
index 284a026..a986e9e 100644
--- a/src/philipstv/_data.py
+++ b/src/philipstv/_data.py
@@ -1,11 +1,10 @@
 import json
 import logging
 from pathlib import Path
-from typing import Any, Dict, Optional, Tuple
+from typing import Optional
 
 from appdirs import user_data_dir
-from pydantic import BaseModel, BaseSettings, ValidationError
-from pydantic.env_settings import SettingsSourceCallable
+from pydantic import BaseModel, ValidationError
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -13,32 +12,27 @@
 DATA_FILE = Path(user_data_dir("philipstv", "cyran.dev")) / "data.json"
 
 
-def json_data_source(settings: BaseSettings) -> Dict[str, Any]:
-    try:
-        _LOGGER.debug("Trying to load application data from %s", DATA_FILE)
-        return json.loads(DATA_FILE.read_text())  # type: ignore [no-any-return]
-    except FileNotFoundError:
-        _LOGGER.debug("Data file not found")
-        return {}
-    finally:
-        _LOGGER.debug("Application data loaded successfully")
-
-
 class HostData(BaseModel):
     host: str
     id: str
     key: str
 
 
-class PhilipsTVData(BaseSettings):
+class PhilipsTVData(BaseModel):
     last_host: HostData
 
     @classmethod
     def load(cls) -> Optional["PhilipsTVData"]:
         try:
-            return cls()
+            _LOGGER.debug("Trying to load application data from %s", DATA_FILE)
+            return cls.model_validate(json.loads(DATA_FILE.read_text()))
+        except FileNotFoundError:
+            _LOGGER.debug("Data file not found")
+            return None
         except ValidationError:
             return None
+        finally:
+            _LOGGER.debug("Application data loaded successfully")
 
     def save(self) -> None:
         _LOGGER.debug("Saving application data to %s", DATA_FILE)
@@ -46,15 +40,5 @@ def save(self) -> None:
             _LOGGER.debug("Data file doesn't exist, creating")
             DATA_FILE.parent.mkdir(parents=True, exist_ok=True)
             DATA_FILE.touch()
-        DATA_FILE.write_text(self.json())
+        DATA_FILE.write_text(self.model_dump_json())
         _LOGGER.debug("Application data saved successfully")
-
-    class Config:
-        @classmethod
-        def customise_sources(
-            cls,
-            init_settings: SettingsSourceCallable,
-            env_settings: SettingsSourceCallable,
-            file_secret_settings: SettingsSourceCallable,
-        ) -> Tuple[SettingsSourceCallable, ...]:
-            return (init_settings, json_data_source)
diff --git a/src/philipstv/model/ambilight.py b/src/philipstv/model/ambilight.py
index 9beb0eb..fed2c43 100644
--- a/src/philipstv/model/ambilight.py
+++ b/src/philipstv/model/ambilight.py
@@ -1,5 +1,6 @@
 from typing import Dict, Tuple, Union
 
+from pydantic import RootModel
 from pydantic.fields import Field
 
 from .base import APIObject, StrEnum
@@ -92,23 +93,23 @@ class AmbilightLayer(APIObject):
     """Colors of pixels on the bottom edge."""
 
 
-class AmbilightColors(APIObject):
+class AmbilightColors(APIObject, RootModel[Dict[str, AmbilightLayer]]):
     """Model of full Amblight per-pixel color definition.
 
     This model is actually a wrapper around a dict since layer names are not predefined.
-    Values should be set as dict using ``__root__`` kwarg in constructor and accessed as in normal
+    Values should be set as dict passed to constructor and accessed as in normal
     dict using indexing::
 
-        colors = AmbilightColors(__root__={"layer1": AmbilightLayer()})
+        colors = AmbilightColors({"layer1": AmbilightLayer()})
         layer1 = colors["layer1"]
 
     """
 
-    __root__: Dict[str, AmbilightLayer] = {}
+    root: Dict[str, AmbilightLayer]
     """Mapping of layer name to :class:`AmbilightLayer`."""
 
     def __getitem__(self, item: str) -> AmbilightLayer:
-        return self.__root__[item]
+        return self.root[item]
 
 
 AmbilightColorSettings = Union[
diff --git a/src/philipstv/model/base.py b/src/philipstv/model/base.py
index 208463d..d72e988 100644
--- a/src/philipstv/model/base.py
+++ b/src/philipstv/model/base.py
@@ -16,6 +16,8 @@ class APIObject(BaseModel):
 
     """
 
+    model_config = {"populate_by_name": True, "use_enum_values": True}
+
     def dump(self) -> Any:
         """Dump the object's JSON data.
 
@@ -25,8 +27,7 @@ def dump(self) -> Any:
             Model's JSON data.
 
         """
-        data = super().dict(by_alias=True)
-        return data["__root__"] if self.__custom_root_type__ else data
+        return self.model_dump(by_alias=True)
 
     @classmethod
     def parse(cls: Type[_SelfAPIObject], raw: Any) -> _SelfAPIObject:
@@ -45,11 +46,7 @@ def parse(cls: Type[_SelfAPIObject], raw: Any) -> _SelfAPIObject:
             ValidationError: if given JSON data cannot be parsed into this model.
 
         """
-        return cls.parse_obj(raw)
-
-    class Config:
-        allow_population_by_field_name = True
-        use_enum_values = True
+        return cls.model_validate(raw)
 
 
 class StrEnum(str, Enum):
diff --git a/src/philipstv/remote.py b/src/philipstv/remote.py
index 9483ed3..6e23909 100644
--- a/src/philipstv/remote.py
+++ b/src/philipstv/remote.py
@@ -114,7 +114,7 @@ def pair(self, pin_callback: PinCallback, id: Optional[str] = None) -> Credentia
             id=id,
             device_name=uname_info.node,
             device_os=uname_info.system,
-            app_id=69,
+            app_id="69",
             app_name="philipstv",
             type="native",
         )
@@ -273,7 +273,8 @@ def set_ambilight_color(
         if set_bottom := (bottom or color):
             sides["bottom"] = self._create_ambilight_side(set_bottom, topology.bottom)
 
-        colors = AmbilightColors(__root__={"layer1": AmbilightLayer(**sides)})
+        # pydantic.mypy plugin issue: https://github.com/pydantic/pydantic/discussions/7418
+        colors = AmbilightColors({"layer1": AmbilightLayer(**sides)})  # type: ignore[misc]
         self._api.set_ambilight_cached(colors)
 
     def _create_ambilight_side(
diff --git a/tests/test_cli.py b/tests/test_cli.py
index b5b6090..983f745 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -107,9 +107,9 @@ def test_saves_data(data_file: Path, remote: Mock) -> None:
     run("--host", given_host, "--id", given_id, "--key", given_key, "--save", "power", "get")
 
     assert data_file.exists() is True
-    assert data_file.read_text() == json.dumps(
-        {"last_host": {"host": given_host, "id": given_id, "key": given_key}}
-    )
+    assert json.loads(data_file.read_text()) == {
+        "last_host": {"host": given_host, "id": given_id, "key": given_key}
+    }
 
 
 def test_reads_saved_data(data_file: Path, remote: Mock) -> None:
@@ -152,9 +152,9 @@ def test_pair_save(remote: Mock, data_file: Path) -> None:
     run("--host", given_host, "--id", given_id, "--save", "pair")
 
     assert data_file.exists() is True
-    assert data_file.read_text() == json.dumps(
-        {"last_host": {"host": given_host, "id": given_id, "key": given_key}}
-    )
+    assert json.loads(data_file.read_text()) == {
+        "last_host": {"host": given_host, "id": given_id, "key": given_key}
+    }
 
 
 def test_pair_error(remote: Mock) -> None:
diff --git a/tests/test_remote.py b/tests/test_remote.py
index 0876707..a03cf78 100644
--- a/tests/test_remote.py
+++ b/tests/test_remote.py
@@ -265,8 +265,9 @@ def test_set_ambilight_color_sides(api_mock: Mock) -> None:
     )
 
     api_mock.set_ambilight_cached.assert_called_once_with(
-        AmbilightColors(
-            __root__={
+        # pydantic.mypy plugin issue: https://github.com/pydantic/pydantic/discussions/7418
+        AmbilightColors(  # type: ignore[misc]
+            {
                 "layer1": AmbilightLayer(
                     left={str(point): left_color for point in range(topology.left)},
                     top={str(point): top_color for point in range(topology.top)},