diff --git a/cloudflare.check.php b/cloudflare.check.php
index a78967bb7..ae3365f07 100644
--- a/cloudflare.check.php
+++ b/cloudflare.check.php
@@ -17,7 +17,7 @@ class G5CloudflareRequestHandler {
             '197.234.240.0/22',
             '198.41.128.0/17',
             '162.158.0.0/15',
-            '104.16.0.0/12',
+            '104.16.0.0/13',
             '104.24.0.0/14',
             '172.64.0.0/13',
             '131.0.72.0/22',