diff --git a/Settings.md b/Settings.md
index 32d3523..b18b987 100644
--- a/Settings.md
+++ b/Settings.md
@@ -148,6 +148,9 @@ Action which is called (with the IAppBuilder or IApplicationBuilder) before the
 ### PostWireMockMiddlewareInit
 Action which is called (with the IAppBuilder or IApplicationBuilder) after the internal WireMockMiddleware is initialized. [Optional]
 
+### AdditionalServiceRegistration
+Action which is called with IServiceCollection when ASP.NET Core DI is being configured. [Optional]
+
 ### Logger
 The [IWireMockLogger](https://github.com/WireMock-Net/WireMock.Net/blob/master/src/WireMock.Net/Logging/IWireMockLogger.cs) interface which logs Debug, Info, Warning or Error.