diff --git a/star2xml/requirements.txt b/star2xml/requirements.txt
index a8e6384..4511c03 100644
--- a/star2xml/requirements.txt
+++ b/star2xml/requirements.txt
@@ -1,7 +1,7 @@
 pandas==1.2.2
 PyYAML==5.4.1
 argparse==1.4.0
-lxml==4.6.5
+lxml==4.9.1
 datetime==4.3
 openpyxl==3.0.6
 requests==2.25.1