diff --git a/resources/forms/mainwindow.ui b/resources/forms/mainwindow.ui
index 2b422d930..60595864e 100644
--- a/resources/forms/mainwindow.ui
+++ b/resources/forms/mainwindow.ui
@@ -38,6 +38,12 @@
        <enum>Qt::Horizontal</enum>
       </property>
       <widget class="QWidget" native="1" name="PreviewPane" >
+       <property name="minimumSize">
+        <size>
+         <width>150</width>
+         <height>0</height>
+        </size>
+       </property>
        <layout class="QVBoxLayout" name="PreviewPaneLayout" >
         <property name="spacing" >
          <number>0</number>
@@ -78,6 +84,12 @@
        </layout>
       </widget>
       <widget class="QWidget" native="1" name="LivePane" >
+       <property name="minimumSize">
+        <size>
+         <width>150</width>
+         <height>0</height>
+        </size>
+       </property>
        <layout class="QVBoxLayout" name="LivePaneLayout" >
         <property name="spacing" >
          <number>0</number>