diff --git a/Alerting/Sample Watches/requirements.txt b/Alerting/Sample Watches/requirements.txt
index c0ecfb44..0cccadf0 100644
--- a/Alerting/Sample Watches/requirements.txt	
+++ b/Alerting/Sample Watches/requirements.txt	
@@ -6,7 +6,7 @@ idna==2.1
 lxml==3.6.4
 ndg-httpsclient==0.4.4
 ordereddict==1.1
-protobuf==3.1.0.post1
+protobuf==3.18.3
 pyasn1==0.1.9
 pycparser==2.14
 pyOpenSSL==17.5.0