diff --git a/custom_components/luxtronik/const.py b/custom_components/luxtronik/const.py
index 2245cbb..550377e 100644
--- a/custom_components/luxtronik/const.py
+++ b/custom_components/luxtronik/const.py
@@ -7,6 +7,9 @@
 from typing import Final
 
 from enum import StrEnum
+import voluptuous as vol
+
+import homeassistant.helpers.config_validation as cv
 from homeassistant.const import Platform
 from homeassistant.helpers.typing import StateType