diff --git a/docs/requirements.txt b/docs/requirements.txt
index d7fef4eb49..a218ee502b 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,3 +2,4 @@ urllib3
 myst_parser[linkify]
 sphinx-book-theme
 deepmodeling-sphinx>=0.3.0
+