diff --git a/homeassistant/components/cert_expiry/sensor.py b/homeassistant/components/cert_expiry/sensor.py
index 0aa67993180..bad82289017 100644
--- a/homeassistant/components/cert_expiry/sensor.py
+++ b/homeassistant/components/cert_expiry/sensor.py
@@ -5,14 +5,13 @@ from datetime import datetime, timedelta
 
 import voluptuous as vol
 
-from homeassistant.components.sensor import PLATFORM_SCHEMA, SensorEntity
-from homeassistant.config_entries import SOURCE_IMPORT
-from homeassistant.const import (
-    CONF_HOST,
-    CONF_PORT,
-    DEVICE_CLASS_TIMESTAMP,
-    EVENT_HOMEASSISTANT_START,
+from homeassistant.components.sensor import (
+    PLATFORM_SCHEMA,
+    SensorDeviceClass,
+    SensorEntity,
 )
+from homeassistant.config_entries import SOURCE_IMPORT
+from homeassistant.const import CONF_HOST, CONF_PORT, EVENT_HOMEASSISTANT_START
 from homeassistant.core import callback
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.event import async_call_later
@@ -78,7 +77,7 @@ class CertExpiryEntity(CoordinatorEntity):
 class SSLCertificateTimestamp(CertExpiryEntity, SensorEntity):
     """Implementation of the Cert Expiry timestamp sensor."""
 
-    _attr_device_class = DEVICE_CLASS_TIMESTAMP
+    _attr_device_class = SensorDeviceClass.TIMESTAMP
 
     def __init__(self, coordinator) -> None:
         """Initialize a Cert Expiry timestamp sensor."""