diff --git a/Bloxstrap/Resources/CustomBootstrapperSchema.json b/Bloxstrap/Resources/CustomBootstrapperSchema.json
index df53076..44b6631 100644
--- a/Bloxstrap/Resources/CustomBootstrapperSchema.json
+++ b/Bloxstrap/Resources/CustomBootstrapperSchema.json
@@ -45,7 +45,8 @@
 				"Version": "int",
 				"Theme": "Theme",
 				"Title": "string",
-				"IgnoreTitleBarInset": "bool"
+				"IgnoreTitleBarInset": "bool",
+				"WindowCornerPreference": "WindowCornerPreference"
 			}
 		},
 		"TitleBar": {
@@ -507,6 +508,14 @@
 				"Horizontal",
 				"Vertical"
 			]
+		},
+		"WindowCornerPreference": {
+			"Values": [
+				"Default",
+				"DoNotRound",
+				"Round",
+				"RoundSmall"
+			]
 		}
 	}
 }
\ No newline at end of file
diff --git a/Bloxstrap/UI/Elements/Bootstrapper/CustomDialog.Elements.cs b/Bloxstrap/UI/Elements/Bootstrapper/CustomDialog.Elements.cs
index e85f4f1..d5e8b19 100644
--- a/Bloxstrap/UI/Elements/Bootstrapper/CustomDialog.Elements.cs
+++ b/Bloxstrap/UI/Elements/Bootstrapper/CustomDialog.Elements.cs
@@ -387,6 +387,8 @@ namespace Bloxstrap.UI.Elements.Bootstrapper
             dialog.Resources.MergedDictionaries.Add(new ThemesDictionary() { Theme = wpfUiTheme });
             dialog.DefaultBorderThemeOverwrite = wpfUiTheme;
 
+            dialog.WindowCornerPreference = ParseXmlAttribute<Wpf.Ui.Appearance.WindowCornerPreference>(xmlElement, "WindowCornerPreference", Wpf.Ui.Appearance.WindowCornerPreference.Round);
+
             // disable default window border if border is modified
             if (xmlElement.Attribute("BorderBrush") != null || xmlElement.Attribute("BorderThickness") != null)
                 dialog.DefaultBorderEnabled = false;