diff --git a/lib/Poet/Manual/Subclassing.pod b/lib/Poet/Manual/Subclassing.pod
index b1fab59..8451c58 100644
--- a/lib/Poet/Manual/Subclassing.pod
+++ b/lib/Poet/Manual/Subclassing.pod
@@ -12,7 +12,9 @@ You can subclass the following Poet classes for your application:
     Poet::Log
     Poet::Mason
     Poet::Import
-    
+    Poet::Plack::Request
+    Poet::Plack::Response
+
 and arrange things so that Poet always uses your subclass instead of its
 default class.