diff --git a/autogpt_platform/backend/backend/data/credit.py b/autogpt_platform/backend/backend/data/credit.py
index b4953eed29..5feb5f9292 100644
--- a/autogpt_platform/backend/backend/data/credit.py
+++ b/autogpt_platform/backend/backend/data/credit.py
@@ -132,12 +132,14 @@ class UserCreditBase(ABC):
             },
         )
         transaction_balance = (
-            transactions[0].get("_sum", {}).get("amount", 0) + snapshot_balance
+            int(transactions[0].get("_sum", {}).get("amount", 0) + snapshot_balance)
             if transactions
             else snapshot_balance
         )
         transaction_time = (
-            transactions[0].get("_max", {}).get("createdAt", datetime_min)
+            datetime.fromisoformat(
+                str(transactions[0].get("_max", {}).get("createdAt", datetime_min))
+            )
             if transactions
             else snapshot_time
         )