diff --git a/src/index.js b/src/index.js
index 6713a9a..ddb92f3 100644
--- a/src/index.js
+++ b/src/index.js
@@ -16,11 +16,13 @@ export {
 export installDemo from './demo';
 
 const applyConfig = (config) => {
-  config.widgets.widget.object_list_popup = ObjectListWidget;
-  config.widgets.widget.object_list_inline = ObjectListInlineWidget;
-  config.widgets.widget.object_by_type = ObjectByTypeWidget;
-  config.widgets.widget.option_mapping = MappingWidget;
-  config.widgets.widget.attachedimage = AttachedImageWidget;
+  if (config.widgets?.widget) {
+    config.widgets.widget.object_list_popup = ObjectListWidget;
+    config.widgets.widget.object_list_inline = ObjectListInlineWidget;
+    config.widgets.widget.object_by_type = ObjectByTypeWidget;
+    config.widgets.widget.option_mapping = MappingWidget;
+    config.widgets.widget.attachedimage = AttachedImageWidget;
+  }
 
   return config;
 };