diff --git a/Libraries/src/Amazon.Lambda.AspNetCoreServer.Hosting/README.md b/Libraries/src/Amazon.Lambda.AspNetCoreServer.Hosting/README.md
index bf3455a65..0276e1f2b 100644
--- a/Libraries/src/Amazon.Lambda.AspNetCoreServer.Hosting/README.md
+++ b/Libraries/src/Amazon.Lambda.AspNetCoreServer.Hosting/README.md
@@ -48,4 +48,8 @@ app.MapControllers();
 
 app.Run();
 
-```
\ No newline at end of file
+```
+
+## Handler Configuration
+
+The Lambda function handler must be set to the assembly name (e.g., `MyLambdaProject`). The `AddAWSLambdaHosting` method sets up the Lambda runtime client and registers the callback for processing Lambda events, so the handler should not use the class library format (`<assembly-name>::<full-type-name>::<method-name>`).