diff --git a/src/root/static/css/tree.css b/src/root/static/css/tree.css
index 71df2f12..e80f6871 100644
--- a/src/root/static/css/tree.css
+++ b/src/root/static/css/tree.css
@@ -9,6 +9,7 @@ ul.tree, ul.subtree {
 ul.subtree > li {
     position: relative;
     padding-left: 2.0em;
+    line-height: 140%;
     border-left: 0.1em solid #6185a0;
 }