diff --git a/pxtarget.json b/pxtarget.json
index fb824398..8f1f9f3a 100644
--- a/pxtarget.json
+++ b/pxtarget.json
@@ -108,6 +108,7 @@
             "zh-CN"
         ],
         "highContrast": true,
+        "lightToc": true,
         "docMenu": [
             {
                 "name": "Support",