diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index 286715d..090ac11 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -247,7 +247,7 @@ CalcState CALCULATE_LIBRARY_API compute_duration_for_parking_ticket(
                                         tariff, PaymentOption::Option1,
                                         cs.toLocal8Bit().constData(),
                                         price, false, true).c_str();
-        ticketEndTime = QDateTime::fromString(endTime);
+        ticketEndTime = QDateTime::fromString(endTime,Qt::ISODate);
 
         // DEBUG
         qCritical() << "compute_duration_for_parking_ticket(): ";