diff --git a/spec.rst b/spec.rst
index 7c505eff..93ff8c18 100644
--- a/spec.rst
+++ b/spec.rst
@@ -188,6 +188,8 @@ Chapter 4 Installing, Updating, and Removing  Software
 
 4.3 Software Sources
 
+4.4 Lubuntu Update Notifier
+
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 Chapter 5 Panel Desktop and Runner
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