diff --git a/less/tree.less b/less/tree.less
index e59a00a87..56a5ee38e 100644
--- a/less/tree.less
+++ b/less/tree.less
@@ -4,6 +4,9 @@
 .resourceTree {
     height: 100%;
     flex: 0 0 auto;
+    .main {
+        height: 100%;
+    }
 }
 
 .resourceTreeScroll {