diff --git a/docs/user/book.css b/docs/user/book.css
index 720e30b0e4..d6102a8646 100644
--- a/docs/user/book.css
+++ b/docs/user/book.css
@@ -350,11 +350,8 @@ div.contents hr {
 	display: none;
 }
 
-div.contents ul {
-	list-style: none;
-}
-
 div.contents li {
+	line-height: 1.3;
 	margin-bottom: 10px;
 	margin-left: 20px;
 }