diff --git a/TL866_Updater/C#/mainform.Designer.cs b/TL866_Updater/C#/mainform.Designer.cs
index ee84f7a..7bd1cc2 100644
--- a/TL866_Updater/C#/mainform.Designer.cs
+++ b/TL866_Updater/C#/mainform.Designer.cs
@@ -551,6 +551,10 @@
             this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
             this.Text = "TL866 firmware updater";
             this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
+            this.SizeChanged += new System.EventHandler(this.MainForm_SizeChanged);
+            this.Resize += new System.EventHandler(this.MainForm_SizeChanged);
+            this.StyleChanged += new System.EventHandler(this.MainForm_SizeChanged);
+            this.SystemColorsChanged += new System.EventHandler(this.MainForm_SizeChanged);
             this.TabPage2.ResumeLayout(false);
             this.GroupBox3.ResumeLayout(false);
             this.GroupBox3.PerformLayout();
diff --git a/TL866_Updater/C#/mainform.cs b/TL866_Updater/C#/mainform.cs
index 806d931..21bc6b1 100644
--- a/TL866_Updater/C#/mainform.cs
+++ b/TL866_Updater/C#/mainform.cs
@@ -60,6 +60,11 @@ namespace TL866
             usbdevice.RegisterForDeviceChange(false, this);
         }
 
+        private void MainForm_SizeChanged(object sender, EventArgs e)
+        {
+            TabPage1.Refresh();
+            TabPage2.Refresh();
+        }
 
         private void BtnInput_Click(object sender, EventArgs e)
         {