diff --git a/_Sidebar.md b/_Sidebar.md
index 3a66961..7cc5ff7 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -1,3 +1,4 @@
 ## Contents
 ### [Home](https://github.com/yokoffing/Betterfox/wiki)
+### [Optional Hardening](https://github.com/yokoffing/Betterfox/wiki/Optional-Hardening)
 ### [Extension Recommendations](https://github.com/yokoffing/Betterfox/wiki/Extension-Recommendations)
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