diff --git a/config.toml b/config.toml
index 765ce456a76c..23e21d80d9fa 100644
--- a/config.toml
+++ b/config.toml
@@ -1,6 +1,6 @@
-[TOC] 
+[TOC]
 main_font_size = "13px"
-main_indent = "1em"
+main_indent = "0.8em"
 main_margin = "0.5em"
 
 chapter_font_size = "18px"