diff --git a/requirements.txt b/requirements.txt
index f86596f..ccf3550 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ Jinja2==2.8
 jpglitch==0.2
 jsondatabase==0.1.6
 jsonpickle==0.9.3
-lxml==3.7.1
+lxml==4.6.5
 MarkupSafe==0.23
 matplotlib==1.5.3
 more-itertools==2.4.1