diff --git a/material_maker/windows/add_node_popup/add_node_popup.gd b/material_maker/windows/add_node_popup/add_node_popup.gd
index 4bc49f29..d6f5719d 100644
--- a/material_maker/windows/add_node_popup/add_node_popup.gd
+++ b/material_maker/windows/add_node_popup/add_node_popup.gd
@@ -82,6 +82,7 @@ func show_popup(node_name : String = "", slot : int = -1, slot_type : int = -1,
 
 
 func update_list(filter_text : String = "") -> void:
+	filter_text = filter_text.to_lower()
 	$PanelContainer/VBoxContainer/ScrollContainer.get_v_scrollbar().value = 0.0
 	list.clear()
 	for i in library_manager.get_items(filter_text, true):