diff --git a/custom_components/easy_computer_manager/switch.py b/custom_components/easy_computer_manager/switch.py
index 7525ddc..36c6199 100644
--- a/custom_components/easy_computer_manager/switch.py
+++ b/custom_components/easy_computer_manager/switch.py
@@ -151,7 +151,8 @@ class ComputerSwitch(SwitchEntity):
             name=self._attr_name,
             manufacturer="Generic",
             model="Computer",
-            sw_version=utils.get_operating_system_version(self._connection),
+            sw_version=utils.get_operating_system_version(
+                self._connection) if self._connection.is_connected() else "Unknown",
             connections={(dr.CONNECTION_NETWORK_MAC, self._mac_address)},
         )