diff --git a/src/Blazor.Diagrams.Core/Models/GroupModel.cs b/src/Blazor.Diagrams.Core/Models/GroupModel.cs
index 041d872e..54437d99 100644
--- a/src/Blazor.Diagrams.Core/Models/GroupModel.cs
+++ b/src/Blazor.Diagrams.Core/Models/GroupModel.cs
@@ -111,7 +111,7 @@ private void OnNodeChanged(NodeModel node)
         }
     }
 
-    private bool UpdateDimensions()
+    protected virtual bool UpdateDimensions()
     {
         if (Children.Count == 0)
             return true;