diff --git a/homeassistant/components/camera/webrtc.py b/homeassistant/components/camera/webrtc.py
index 05924855bc4..fb9f05b58da 100644
--- a/homeassistant/components/camera/webrtc.py
+++ b/homeassistant/components/camera/webrtc.py
@@ -7,9 +7,6 @@ from collections.abc import Awaitable, Callable, Coroutine
 from dataclasses import dataclass, field
 from typing import TYPE_CHECKING, Any, Protocol
 
-from mashumaro import field_options
-from mashumaro.config import BaseConfig
-from mashumaro.mixins.dict import DataClassDictMixin
 import voluptuous as vol
 
 from homeassistant.components import websocket_api
@@ -32,19 +29,8 @@ DATA_ICE_SERVERS: HassKey[list[Callable[[], Coroutine[Any, Any, RTCIceServer]]]]
 )
 
 
-class _RTCBaseModel(DataClassDictMixin):
-    """Base class for RTC models."""
-
-    class Config(BaseConfig):
-        """Mashumaro config."""
-
-        # Serialize to spec conform names and omit default values
-        omit_default = True
-        serialize_by_alias = True
-
-
 @dataclass
-class RTCIceServer(_RTCBaseModel):
+class RTCIceServer:
     """RTC Ice Server.
 
     See https://www.w3.org/TR/webrtc/#rtciceserver-dictionary
@@ -54,30 +40,56 @@ class RTCIceServer(_RTCBaseModel):
     username: str | None = None
     credential: str | None = None
 
+    def to_frontend_dict(self) -> dict[str, Any]:
+        """Return a dict that can be used by the frontend."""
+
+        data = {
+            "urls": self.urls,
+        }
+        if self.username is not None:
+            data["username"] = self.username
+        if self.credential is not None:
+            data["credential"] = self.credential
+        return data
+
 
 @dataclass
-class RTCConfiguration(_RTCBaseModel):
+class RTCConfiguration:
     """RTC Configuration.
 
     See https://www.w3.org/TR/webrtc/#rtcconfiguration-dictionary
     """
 
-    ice_servers: list[RTCIceServer] = field(
-        metadata=field_options(alias="iceServers"), default_factory=list
-    )
+    ice_servers: list[RTCIceServer] = field(default_factory=list)
+
+    def to_frontend_dict(self) -> dict[str, Any]:
+        """Return a dict that can be used by the frontend."""
+        if not self.ice_servers:
+            return {}
+
+        return {
+            "iceServers": [server.to_frontend_dict() for server in self.ice_servers]
+        }
 
 
 @dataclass(kw_only=True)
-class WebRTCClientConfiguration(_RTCBaseModel):
+class WebRTCClientConfiguration:
     """WebRTC configuration for the client.
 
     Not part of the spec, but required to configure client.
     """
 
     configuration: RTCConfiguration = field(default_factory=RTCConfiguration)
-    data_channel: str | None = field(
-        metadata=field_options(alias="dataChannel"), default=None
-    )
+    data_channel: str | None = None
+
+    def to_frontend_dict(self) -> dict[str, Any]:
+        """Return a dict that can be used by the frontend."""
+        data: dict[str, Any] = {
+            "configuration": self.configuration.to_frontend_dict(),
+        }
+        if self.data_channel is not None:
+            data["dataChannel"] = self.data_channel
+        return data
 
 
 class CameraWebRTCProvider(Protocol):
@@ -153,7 +165,7 @@ async def ws_get_client_config(
         )
         return
 
-    config = (await camera.async_get_webrtc_client_configuration()).to_dict()
+    config = (await camera.async_get_webrtc_client_configuration()).to_frontend_dict()
     connection.send_result(
         msg["id"],
         config,
diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index d1a09ceb648..68642432c42 100644
--- a/homeassistant/package_constraints.txt
+++ b/homeassistant/package_constraints.txt
@@ -38,7 +38,6 @@ httpx==0.27.2
 ifaddr==0.2.0
 Jinja2==3.1.4
 lru-dict==1.3.0
-mashumaro==3.13.1
 mutagen==1.47.0
 orjson==3.10.7
 packaging>=23.1
@@ -123,6 +122,9 @@ backoff>=2.0
 # v2 has breaking changes (#99218).
 pydantic==1.10.18
 
+# Required for Python 3.12.4 compatibility (#119223).
+mashumaro>=3.13.1
+
 # Breaks asyncio
 # https://github.com/pubnub/python/issues/130
 pubnub!=6.4.0
diff --git a/pyproject.toml b/pyproject.toml
index 4e4d7c69538..81eb21242b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,6 @@ dependencies    = [
     "ifaddr==0.2.0",
     "Jinja2==3.1.4",
     "lru-dict==1.3.0",
-    "mashumaro==3.13.1",
     "PyJWT==2.9.0",
     # PyJWT has loose dependency. We want the latest one.
     "cryptography==43.0.1",
diff --git a/requirements.txt b/requirements.txt
index 7c40ac6236e..3f6f73f8430 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,6 @@ home-assistant-bluetooth==1.13.0
 ifaddr==0.2.0
 Jinja2==3.1.4
 lru-dict==1.3.0
-mashumaro==3.13.1
 PyJWT==2.9.0
 cryptography==43.0.1
 Pillow==10.4.0
diff --git a/script/gen_requirements_all.py b/script/gen_requirements_all.py
index 7787578902c..4641d4ac12a 100755
--- a/script/gen_requirements_all.py
+++ b/script/gen_requirements_all.py
@@ -140,6 +140,9 @@ backoff>=2.0
 # v2 has breaking changes (#99218).
 pydantic==1.10.18
 
+# Required for Python 3.12.4 compatibility (#119223).
+mashumaro>=3.13.1
+
 # Breaks asyncio
 # https://github.com/pubnub/python/issues/130
 pubnub!=6.4.0