diff --git a/conf.pre.json b/conf.pre.json
index f1272e8..0e09801 100644
--- a/conf.pre.json
+++ b/conf.pre.json
@@ -19,8 +19,8 @@
   },
   "menu": {
     "toc": {
-      "startLevel": "1",
-      "overLevel": "1"
+      "startLevel": "0",
+      "overLevel": "0"
     },
     "items": [
       {