diff --git a/requirements.txt b/requirements.txt
index e96ecb1..cdf16aa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 attrs==19.3.0
 importlib-metadata==1.5.0
-lxml==4.5.0
+lxml==4.9.1
 more-itertools==8.2.0
 packaging==20.3
 pdfminer3k==1.3.1