diff --git a/book.json b/book.json
index 769d815..95a9775 100644
--- a/book.json
+++ b/book.json
@@ -1,3 +1,8 @@
 {
-    "lang":"zh-cn"
+    "lang":"zh-cn",
+    "pluginsConfig": {
+	"theme-default": {
+	    "showLevel": true
+	}
+    }
 }