diff --git a/requirements.txt b/requirements.txt
index 654ffa7..46ea79a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ huey==0.4.2
 ipython==2.1.0
 itsdangerous==0.24
 jsmin==2.0.11
-lxml==3.4.0
+lxml==4.6.3
 macholib==1.5.1
 matplotlib==1.3.1
 mitmproxy==0.10.1