diff --git a/requirements.txt b/requirements.txt
index 2610bbf..f963285 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 jieba==0.38
 BeautifulSoup4==4.6.0
 EbookLib==0.15
-lxml==4.6.3
+lxml==4.9.1