diff --git a/win/gatuna-client/MainForm.cs b/win/gatuna-client/MainForm.cs
index ff8e9bb..51fd8f2 100644
--- a/win/gatuna-client/MainForm.cs
+++ b/win/gatuna-client/MainForm.cs
@@ -20,6 +20,8 @@ public partial class MainForm : Form
         Text = "gatuna";
         Width = 520;
         Height = 420;
+        FormBorderStyle = FormBorderStyle.FixedSingle;
+        MaximizeBox = false;
         StartPosition = FormStartPosition.CenterScreen;
         Icon = SystemIcons.GetStockIcon(StockIconId.NetworkConnect, 32);
         InitializeComponents();