diff --git a/src/gui_qt/_py/interpol_dialog.py b/src/gui_qt/_py/interpol_dialog.py
index c819070..c3b0827 100644
--- a/src/gui_qt/_py/interpol_dialog.py
+++ b/src/gui_qt/_py/interpol_dialog.py
@@ -1,10 +1,11 @@
 # -*- coding: utf-8 -*-
 
-# Form implementation generated from reading ui file 'resources/_ui/interpol_dialog.ui'
+# Form implementation generated from reading ui file 'src/resources/_ui/interpol_dialog.ui'
 #
-# Created by: PyQt5 UI code generator 5.12.3
+# Created by: PyQt5 UI code generator 5.15.9
 #
-# WARNING! All changes made in this file will be lost!
+# WARNING: Any manual changes made to this file will be lost when pyuic5 is
+# run again.  Do not edit this file unless you know what you are doing.
 
 
 from PyQt5 import QtCore, QtGui, QtWidgets
@@ -65,12 +66,13 @@ class Ui_Dialog(object):
         self.label_2 = QtWidgets.QLabel(Dialog)
         self.label_2.setObjectName("label_2")
         self.gridLayout.addWidget(self.label_2, 6, 0, 1, 1)
-        self.listWidget = QtWidgets.QListWidget(Dialog)
+        self.listWidget = QListWidgetSelect(Dialog)
         sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Expanding)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.listWidget.sizePolicy().hasHeightForWidth())
         self.listWidget.setSizePolicy(sizePolicy)
+        self.listWidget.setSelectionMode(QtWidgets.QAbstractItemView.MultiSelection)
         self.listWidget.setObjectName("listWidget")
         self.gridLayout.addWidget(self.listWidget, 1, 0, 1, 2)
         self.sampling_widget = QtWidgets.QWidget(Dialog)
@@ -130,8 +132,8 @@ class Ui_Dialog(object):
         self.label_8.setBuddy(self.dest_combobox)
 
         self.retranslateUi(Dialog)
-        self.buttonBox.accepted.connect(Dialog.accept)
-        self.buttonBox.rejected.connect(Dialog.reject)
+        self.buttonBox.accepted.connect(Dialog.accept) # type: ignore
+        self.buttonBox.rejected.connect(Dialog.reject) # type: ignore
         QtCore.QMetaObject.connectSlotsByName(Dialog)
         Dialog.setTabOrder(self.listWidget, self.ylog_checkBox)
         Dialog.setTabOrder(self.ylog_checkBox, self.interp_comboBox)
@@ -164,3 +166,4 @@ class Ui_Dialog(object):
         self.xaxis_comboBox.setItemText(1, _translate("Dialog", "from data"))
         self.label_8.setText(_translate("Dialog", "Add interpolated data to"))
         self.xlog_checkBox.setText(_translate("Dialog", "use log(x)"))
+from ..lib.listwidget import QListWidgetSelect
diff --git a/src/resources/_ui/interpol_dialog.ui b/src/resources/_ui/interpol_dialog.ui
index 8aabd2f..28fa858 100644
--- a/src/resources/_ui/interpol_dialog.ui
+++ b/src/resources/_ui/interpol_dialog.ui
@@ -141,7 +141,7 @@
     </widget>
    </item>
    <item row="1" column="0" colspan="2">
-    <widget class="QListWidget" name="listWidget">
+    <widget class="QListWidgetSelect" name="listWidget">
      <property name="sizePolicy">
       <sizepolicy hsizetype="MinimumExpanding" vsizetype="Expanding">
        <horstretch>0</horstretch>
@@ -151,6 +151,9 @@
      <property name="toolTip">
       <string>Select sets that shall be interpolated. No selection will create interpolations of all visible sets.</string>
      </property>
+     <property name="selectionMode">
+      <enum>QAbstractItemView::MultiSelection</enum>
+     </property>
     </widget>
    </item>
    <item row="7" column="0" colspan="2">
@@ -276,6 +279,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QListWidgetSelect</class>
+   <extends>QListWidget</extends>
+   <header>..lib.listwidget</header>
+  </customwidget>
+ </customwidgets>
  <tabstops>
   <tabstop>listWidget</tabstop>
   <tabstop>ylog_checkBox</tabstop>