diff --git a/requirements.txt b/requirements.txt
index 477b26a..cdc19e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-lxml==4.9.2
+lxml==6.1.0
 markdown2dita==0.3
 mistune==0.8.1
 tomd==0.1.3