diff --git a/homeassistant/components/mullvad/__init__.py b/homeassistant/components/mullvad/__init__.py
index 7934220cf91..b8551682f1f 100644
--- a/homeassistant/components/mullvad/__init__.py
+++ b/homeassistant/components/mullvad/__init__.py
@@ -8,7 +8,7 @@ from mullvad_api import MullvadAPI
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers import update_coordinator
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 
 from .const import DOMAIN
 
@@ -23,7 +23,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
             api = await hass.async_add_executor_job(MullvadAPI)
             return api.data
 
-    coordinator = update_coordinator.DataUpdateCoordinator(
+    coordinator = DataUpdateCoordinator(
         hass,
         logging.getLogger(__name__),
         name=DOMAIN,
diff --git a/homeassistant/components/mullvad/binary_sensor.py b/homeassistant/components/mullvad/binary_sensor.py
index f39f05dd430..2ccf754bbbd 100644
--- a/homeassistant/components/mullvad/binary_sensor.py
+++ b/homeassistant/components/mullvad/binary_sensor.py
@@ -2,21 +2,24 @@
 from homeassistant.components.binary_sensor import (
     BinarySensorDeviceClass,
     BinarySensorEntity,
+    BinarySensorEntityDescription,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_DEVICE_CLASS, CONF_ID, CONF_NAME
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.update_coordinator import CoordinatorEntity
+from homeassistant.helpers.update_coordinator import (
+    CoordinatorEntity,
+    DataUpdateCoordinator,
+)
 
 from .const import DOMAIN
 
 BINARY_SENSORS = (
-    {
-        CONF_ID: "mullvad_exit_ip",
-        CONF_NAME: "Mullvad Exit IP",
-        CONF_DEVICE_CLASS: BinarySensorDeviceClass.CONNECTIVITY,
-    },
+    BinarySensorEntityDescription(
+        key="mullvad_exit_ip",
+        name="Mullvad Exit IP",
+        device_class=BinarySensorDeviceClass.CONNECTIVITY,
+    ),
 )
 
 
@@ -29,23 +32,26 @@ async def async_setup_entry(
     coordinator = hass.data[DOMAIN]
 
     async_add_entities(
-        MullvadBinarySensor(coordinator, sensor, config_entry)
-        for sensor in BINARY_SENSORS
+        MullvadBinarySensor(coordinator, entity_description, config_entry)
+        for entity_description in BINARY_SENSORS
     )
 
 
 class MullvadBinarySensor(CoordinatorEntity, BinarySensorEntity):
     """Represents a Mullvad binary sensor."""
 
-    def __init__(self, coordinator, sensor, config_entry):
+    def __init__(
+        self,
+        coordinator: DataUpdateCoordinator,
+        entity_description: BinarySensorEntityDescription,
+        config_entry: ConfigEntry,
+    ) -> None:
         """Initialize the Mullvad binary sensor."""
         super().__init__(coordinator)
-        self._sensor = sensor
-        self._attr_device_class = sensor[CONF_DEVICE_CLASS]
-        self._attr_name = sensor[CONF_NAME]
-        self._attr_unique_id = f"{config_entry.entry_id}_{sensor[CONF_ID]}"
+        self.entity_description = entity_description
+        self._attr_unique_id = f"{config_entry.entry_id}_{entity_description.key}"
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return the state for this binary sensor."""
-        return self.coordinator.data[self._sensor[CONF_ID]]
+        return self.coordinator.data[self.entity_description.key]
diff --git a/homeassistant/components/mullvad/config_flow.py b/homeassistant/components/mullvad/config_flow.py
index 5b6ef78133f..ad045dbb54c 100644
--- a/homeassistant/components/mullvad/config_flow.py
+++ b/homeassistant/components/mullvad/config_flow.py
@@ -2,6 +2,7 @@
 from mullvad_api import MullvadAPI, MullvadAPIError
 
 from homeassistant import config_entries
+from homeassistant.data_entry_flow import FlowResult
 
 from .const import DOMAIN
 
@@ -11,7 +12,7 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    async def async_step_user(self, user_input=None):
+    async def async_step_user(self, user_input=None) -> FlowResult:
         """Handle the initial step."""
         self._async_abort_entries_match()