diff --git a/requirements.txt b/requirements.txt
index 79d6f67..ca833a7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ gpiozero==1.5.1
 iso8601==0.1.12
 itsdangerous==1.1.0
 Jinja2==2.11.2
-lxml==4.5.2
+lxml==4.6.5
 MarkupSafe==1.1.1
 pigpio==1.46
 pygments