diff --git a/requirements.txt b/requirements.txt
index 73a98d2..9c1de69 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ itsdangerous==0.24
 Jinja2==2.10
 jsonify==0.5
 kiwisolver==1.0.1
-lxml==4.2.5
+lxml==4.6.3
 macholib==1.11
 MarkupSafe==1.0
 matplotlib==3.0.1