diff --git a/RhSolutions.AddIn/AddIn/RhSolutionsAddIn.cs b/RhSolutions.AddIn/AddIn/RhSolutionsAddIn.cs
index 0ef2d69..40603e8 100644
--- a/RhSolutions.AddIn/AddIn/RhSolutionsAddIn.cs
+++ b/RhSolutions.AddIn/AddIn/RhSolutionsAddIn.cs
@@ -13,8 +13,8 @@ namespace RhSolutions.AddIn;
 public sealed class RhSolutionsAddIn : IExcelAddIn
 {
     public static Application Excel { get; private set; }
-    public static ServiceProvider ServiceProvider { get; set; }
-    public static IAddInConfiguration Configuration { get; set; }
+    public static ServiceProvider ServiceProvider { get; private set; }
+    public static IAddInConfiguration Configuration { get; private set; }
 
     public void AutoOpen()
     {