diff --git a/requirements.txt b/requirements.txt
index 3dc0d71..0b090b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ decorator==4.3.0
 deepdiff==3.2.1
 idna==2.7
 jsonpickle==0.9.4
-lxml==4.2.5
+lxml==4.9.1
 matplotlib
 mwoauth==0.3.2
 networkx==2.1