diff --git a/CHANGELOG.md b/CHANGELOG.md
index 149f2876b..4a476590a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 # Change log
+- [#557](https://github.com/mobilityhouse/ocpp/issues/557) OCPP 2.0.1 Wrong data type in CostUpdated total_cost
 - [#564](https://github.com/mobilityhouse/ocpp/issues/564) Add support For Python 3.11 and 3.12
 - [#583](https://github.com/mobilityhouse/ocpp/issues/583) OCPP v1.6/v2.0.1 deprecate dataclasses from calls and call results with the suffix 'Payload'
 
diff --git a/ocpp/v201/call.py b/ocpp/v201/call.py
index 461f37365..ddc681606 100644
--- a/ocpp/v201/call.py
+++ b/ocpp/v201/call.py
@@ -71,7 +71,7 @@ class ClearedChargingLimit:
 
 @dataclass
 class CostUpdated:
-    total_cost: int
+    total_cost: float
     transaction_id: str
     custom_data: Optional[Dict[str, Any]] = None