diff --git a/requirements.lock.txt b/requirements.lock.txt
index f1ec065..081b745 100644
--- a/requirements.lock.txt
+++ b/requirements.lock.txt
@@ -38,7 +38,7 @@ iniconfig==1.1.1
 itsdangerous==1.1.0
 Jinja2==2.11.3
 kombu==5.0.2
-lxml==4.6.3
+lxml==4.6.5
 Mako==1.1.4
 Markdown==3.3.3
 MarkupSafe==1.1.1