diff --git a/homeassistant/components/landisgyr_heat_meter/__init__.py b/homeassistant/components/landisgyr_heat_meter/__init__.py
index 28317238bf9..101216cd0d4 100644
--- a/homeassistant/components/landisgyr_heat_meter/__init__.py
+++ b/homeassistant/components/landisgyr_heat_meter/__init__.py
@@ -49,7 +49,7 @@ async def async_migrate_entry(hass: HomeAssistant, config_entry: ConfigEntry) ->
 
     # Removing domain name and config entry id from entity unique id's, replacing it with device number
     if config_entry.version == 1:
-        config_entry.version = 2
+        hass.config_entries.async_update_entry(config_entry, version=2)
 
         device_number = config_entry.data["device_number"]