diff --git a/DI/XDIHelperExtension.cs b/DI/XDIHelperExtension.cs
index 52559e8..098c50d 100644
--- a/DI/XDIHelperExtension.cs
+++ b/DI/XDIHelperExtension.cs
@@ -204,6 +204,9 @@ namespace xIds.DI
         {
             //
             source.AddXApiKeyConfiguration(configuration);
+            
+            //
+            source.AddMemoryCache();
             source.AddScoped<IXApplicationProvider, XApplicationProvider>();
         }