diff --git a/requirements.txt b/requirements.txt
index 1185141..b2aa9cc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ djangorestframework==3.11.2
 elementpath==1.4.5
 eulxml==1.1.3
 idna==2.10
-lxml==4.5.1
+lxml==4.9.1
 nose==1.3.7
 ply==3.11
 py4j==0.10.9.1