diff --git a/qt5_src/Bootloader/MainWindow.cpp b/qt5_src/Bootloader/MainWindow.cpp
index 8ba1c53..f98cdec 100644
--- a/qt5_src/Bootloader/MainWindow.cpp
+++ b/qt5_src/Bootloader/MainWindow.cpp
@@ -1168,9 +1168,9 @@ void MainWindow::GetQuery()
         deviceData->ranges.append(range);
     }
 
-    ui->lblDeviceBootloaderVer->setText(QString::number(extendedBootInfo.PIC18.bootloaderVersion));
+    ui->lblDeviceBootloaderVer->setText(QString("%1").arg(extendedBootInfo.PIC18.bootloaderVersion, 4, 16, QChar('0')));
     QString appVerMsg = (extendedBootInfo.PIC18.applicationVersion > 0) ?
-                        QString::number(extendedBootInfo.PIC18.applicationVersion) :
+                        QString("%1").arg(extendedBootInfo.PIC18.applicationVersion, 4, 16, QChar('0')) :
                         "No FW on device";
     ui->lblDeviceAppFWVer->setText(appVerMsg);