diff --git a/book/source/_static/epub/css/custom.css b/book/source/_static/epub/css/custom.css
index e1791ca..31ee04f 100644
--- a/book/source/_static/epub/css/custom.css
+++ b/book/source/_static/epub/css/custom.css
@@ -50,4 +50,13 @@ Text in glossary links
 span.std-term {
   color: black;
   border-bottom: 1px dotted black;
+}
+
+/*
+Footnote list
+*/
+aside.footnote-list {
+  border-top: 1px solid black;
+  margin-top: 2em;
+  padding-top: 2em;
 }
\ No newline at end of file