diff --git a/requirements.txt b/requirements.txt
index 83a72a8..5416c00 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ numpy==1.17.1
 matplotlib==3.1.1
 scikit_image==0.16.2
 opencv_python==3.4.1.15
-lxml==4.2.1
+lxml==4.9.1
 torch==1.1.0
 urllib3==1.22
 imageio==2.6.1