diff --git a/app/cdap/components/NamespacesPicker/NamespacesPicker.scss b/app/cdap/components/NamespacesPicker/NamespacesPicker.scss
index de5da9d9382..30655211576 100644
--- a/app/cdap/components/NamespacesPicker/NamespacesPicker.scss
+++ b/app/cdap/components/NamespacesPicker/NamespacesPicker.scss
@@ -39,7 +39,7 @@ $monitor-more-color: $blue-02;
 
     .popper {
       width: 300px;
-      z-index: 1; // need to be on top of the svg graph
+      z-index: 999; // need to be on top of the svg graph
       text-align: left;
 
       .popover-content {