diff --git a/src/webui/api/serialize/serialize_torrent.cpp b/src/webui/api/serialize/serialize_torrent.cpp
index 9f22966d4..4f3423fff 100644
--- a/src/webui/api/serialize/serialize_torrent.cpp
+++ b/src/webui/api/serialize/serialize_torrent.cpp
@@ -106,8 +106,8 @@ QVariantMap serialize(const BitTorrent::TorrentHandle &torrent)
         {KEY_TORRENT_SUPER_SEEDING, torrent.superSeeding()},
         {KEY_TORRENT_FORCE_START, torrent.isForced()},
         {KEY_TORRENT_SAVE_PATH, Utils::Fs::toNativePath(torrent.savePath())},
-        {KEY_TORRENT_ADDED_ON, torrent.addedTime().toTime_t()},
-        {KEY_TORRENT_COMPLETION_ON, torrent.completedTime().toTime_t()},
+        {KEY_TORRENT_ADDED_ON, torrent.addedTime().toSecsSinceEpoch()},
+        {KEY_TORRENT_COMPLETION_ON, torrent.completedTime().toSecsSinceEpoch()},
         {KEY_TORRENT_TRACKER, torrent.currentTracker()},
         {KEY_TORRENT_DL_LIMIT, torrent.downloadLimit()},
         {KEY_TORRENT_UP_LIMIT, torrent.uploadLimit()},
@@ -121,7 +121,7 @@ QVariantMap serialize(const BitTorrent::TorrentHandle &torrent)
         {KEY_TORRENT_MAX_SEEDING_TIME, torrent.maxSeedingTime()},
         {KEY_TORRENT_RATIO_LIMIT, torrent.ratioLimit()},
         {KEY_TORRENT_SEEDING_TIME_LIMIT, torrent.seedingTimeLimit()},
-        {KEY_TORRENT_LAST_SEEN_COMPLETE_TIME, torrent.lastSeenComplete().toTime_t()},
+        {KEY_TORRENT_LAST_SEEN_COMPLETE_TIME, torrent.lastSeenComplete().toSecsSinceEpoch()},
         {KEY_TORRENT_AUTO_TORRENT_MANAGEMENT, torrent.isAutoTMMEnabled()},
         {KEY_TORRENT_TIME_ACTIVE, torrent.activeTime()},
         {KEY_TORRENT_AVAILABILITY, torrent.distributedCopies()},
@@ -138,7 +138,7 @@ QVariantMap serialize(const BitTorrent::TorrentHandle &torrent)
     else {
         QDateTime dt = QDateTime::currentDateTime();
         dt = dt.addSecs(-torrent.timeSinceActivity());
-        ret[KEY_TORRENT_LAST_ACTIVITY_TIME] = dt.toTime_t();
+        ret[KEY_TORRENT_LAST_ACTIVITY_TIME] = dt.toSecsSinceEpoch();
     }
 
     return ret;
diff --git a/src/webui/api/torrentscontroller.cpp b/src/webui/api/torrentscontroller.cpp
index 575cb9acc..2b9f09e33 100644
--- a/src/webui/api/torrentscontroller.cpp
+++ b/src/webui/api/torrentscontroller.cpp
@@ -346,8 +346,8 @@ void TorrentsController::propertiesAction()
     dataDict[KEY_PROP_CREATED_BY] = torrent->creator();
     dataDict[KEY_PROP_ADDITION_DATE] = static_cast<double>(torrent->addedTime().toSecsSinceEpoch());
     if (torrent->hasMetadata()) {
-        dataDict[KEY_PROP_LAST_SEEN] = torrent->lastSeenComplete().isValid() ? static_cast<int>(torrent->lastSeenComplete().toTime_t()) : -1;
-        dataDict[KEY_PROP_COMPLETION_DATE] = torrent->completedTime().isValid() ? static_cast<int>(torrent->completedTime().toTime_t()) : -1;
+        dataDict[KEY_PROP_LAST_SEEN] = torrent->lastSeenComplete().isValid() ? torrent->lastSeenComplete().toSecsSinceEpoch() : -1;
+        dataDict[KEY_PROP_COMPLETION_DATE] = torrent->completedTime().isValid() ? torrent->completedTime().toSecsSinceEpoch() : -1;
         dataDict[KEY_PROP_CREATION_DATE] = static_cast<double>(torrent->creationDate().toSecsSinceEpoch());
     }
     else {