diff --git a/jquery.mjs.nestedSortable.js b/jquery.mjs.nestedSortable.js
index e6c0d62..e4a399f 100644
--- a/jquery.mjs.nestedSortable.js
+++ b/jquery.mjs.nestedSortable.js
@@ -22,7 +22,7 @@
 			doNotClear: false,
 			listType: 'ol',
 			maxLevels: 0,
-			protectRoot: false,
+			protectRoots: false,
 			rootID: null,
 			rtl: false,
 			isAllowed: function(item, parent) { return true; }