diff --git a/ImGui/IPersistableWindowConfig.cs b/ImGui/IPersistableWindowConfig.cs
index 9e19cc6..0ed099a 100644
--- a/ImGui/IPersistableWindowConfig.cs
+++ b/ImGui/IPersistableWindowConfig.cs
@@ -6,3 +6,11 @@ public interface IPersistableWindowConfig
 
     void SaveWindowConfig();
 }
+
+public interface IPersistableWindowConfig<out T> : IPersistableWindowConfig
+    where T : WindowConfig
+{
+    new T? WindowConfig { get; }
+
+    WindowConfig? IPersistableWindowConfig.WindowConfig => WindowConfig;
+}
diff --git a/ImGui/WindowConfig.cs b/ImGui/WindowConfig.cs
index 63e6a62..97e32cd 100644
--- a/ImGui/WindowConfig.cs
+++ b/ImGui/WindowConfig.cs
@@ -1,6 +1,6 @@
 namespace LLib.ImGui;
 
-public sealed class WindowConfig
+public class WindowConfig
 {
     public bool IsPinned { get; set; }
     public bool IsClickthrough { get; set; }