diff --git a/assets/js/index.js b/assets/js/index.js
index 1520ad5e0..28808a862 100644
--- a/assets/js/index.js
+++ b/assets/js/index.js
@@ -67,8 +67,6 @@ Source:
   var index = new FlexSearch({
     preset: 'score',
     cache: true,
-    async: true,
-    worker: 4,
     doc: {
         id: 'id',
         field: [