diff --git a/toolbar/hermes_bridge.shelf b/toolbar/hermes_bridge.shelf
index 16e727b..ef8e905 100644
--- a/toolbar/hermes_bridge.shelf
+++ b/toolbar/hermes_bridge.shelf
@@ -152,3 +152,6 @@ class HermesBridgeWindow(QtWidgets.QWidget):
 # ── Per SideFX docs: parent to main window to keep alive ──
 win = HermesBridgeWindow(hou.ui.mainQtWindow())
 win.show()
+]]></script>
+  </tool>
+</shelfDocument>