diff --git a/requirements.txt b/requirements.txt
index ef70acd..9625127 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 beautifulsoup4==4.7.1
-lxml==4.6.5
+lxml==4.9.1
 PyMuPDF==1.14.8
 PyQt5==5.11.3
 PyQt5-sip==4.19.13