diff --git a/json-grid.css b/json-grid.css
index 37b12c9..b032f33 100644
--- a/json-grid.css
+++ b/json-grid.css
@@ -44,3 +44,7 @@
 .json-grid-container span.boolean {
   color: #0000ff;
 }
+
+.json-grid-container span.expander {
+  cursor: pointer;
+}