diff --git a/chb.md b/chb.md
index 2b0647f..69f3ef1 100644
--- a/chb.md
+++ b/chb.md
@@ -42,6 +42,7 @@ header-includes:
   \lhead{Course Handbook}
   \rfoot{Page \thepage}
   \cfoot{}
+  \renewcommand{\footrulewidth}{0.4pt}
 ---