diff --git a/README.md b/README.md
index bc3f8ed56..c6734a812 100644
--- a/README.md
+++ b/README.md
@@ -693,6 +693,8 @@ For example,
             font-size: 20pt;
         }
     }`;
+* Notice: CSS child selector > will be normalized, please use `SPACE` instead.
+  * example: `.sk_theme #sk_omnibarSearchResult ul li:nth-child(odd)`
 
 ## API Documentation