diff --git a/mods/outliner/app.css b/mods/outliner/app.css
index f18c4e0..7095dc4 100644
--- a/mods/outliner/app.css
+++ b/mods/outliner/app.css
@@ -11,6 +11,7 @@
 }
 
 .outline-header {
+  position: relative;
   display: flex;
   align-items: center;
   height: 2.2em;