diff --git a/requirements.txt b/requirements.txt
index 394587f..fdc456b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ EasyProcess==0.2.3
 idna==2.7
 imagesize==1.0.0
 Jinja2==2.10
-lxml==4.4.2
+lxml==4.9.1
 MarkupSafe==1.0
 packaging==17.1
 Paver==1.3.4