diff --git a/middleware/blocker.js b/middleware/blocker.js
index 8b3b13ee..915a6d91 100644
--- a/middleware/blocker.js
+++ b/middleware/blocker.js
@@ -9,7 +9,7 @@ exports.preventCiscoRequest = (req, res, next) => {
   
   // CIDRs for Cisco Umbrella
   // See https://support.umbrella.com/hc/en-us/articles/360059292052-Additional-Egress-IP-Address-Range
-  const cidrs = ['146.112.0.0/16', '155.190.0.0/16'];
+  const cidrs = ['146.112.0.0/16', '155.190.0.0/16', '151.186.0.0/16'];
   
   // Check if IP is in cidr
   const isIpInCidr = cidrs.some(cidr => {