diff --git a/Alerting/Sample Watches/requirements.txt b/Alerting/Sample Watches/requirements.txt
index c0ecfb44..23a7c417 100644
--- a/Alerting/Sample Watches/requirements.txt	
+++ b/Alerting/Sample Watches/requirements.txt	
@@ -3,7 +3,7 @@ cryptography==2.2.2
 elasticsearch==6.0.0
 elasticsearch-xpack==6.0.0
 idna==2.1
-lxml==3.6.4
+lxml==4.9.1
 ndg-httpsclient==0.4.4
 ordereddict==1.1
 protobuf==3.1.0.post1