diff --git a/dsmr_datalogger/dto.py b/dsmr_datalogger/dto.py
index 9255a8aec..a0a52ec86 100644
--- a/dsmr_datalogger/dto.py
+++ b/dsmr_datalogger/dto.py
@@ -1,11 +1,10 @@
 import datetime
 from decimal import Decimal
-from typing import Optional, final
+from typing import Optional
 
 import attr
 
 
-@final
 @attr.dataclass(frozen=True, slots=True)
 class MeterPositionsDTO:
     electricity_timestamp: datetime.datetime