diff --git a/docs/requirements.txt b/docs/requirements.txt
index 84f1cc2..d5efff2 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,4 +2,5 @@ mkdocs==1.4.0
 mkdocs-exclude-search==0.6.4
 mkdocs-jupyter==0.21.0
 mkdocstrings[python]==0.23.0
-Pygments==2.13.0
\ No newline at end of file
+Pygments==2.13.0
+lxml[html_clean]
\ No newline at end of file