diff --git a/group_vars/all.yaml b/group_vars/all.yaml
index c5fb21f..8f535da 100644
--- a/group_vars/all.yaml
+++ b/group_vars/all.yaml
@@ -7,7 +7,7 @@ trusted_ranges:
   - { v: ipv4, cidr: 10.0.0.0/8 }
   - { v: ipv4, cidr: 192.168.0.0/16 }
   - { v: ipv4, cidr: 100.64.0.0/10 }
-  - { v: ipv4, cidr: 172.16.0.0/21 }
+  - { v: ipv4, cidr: 172.16.0.0/12 }
   - { v: ipv4, cidr: 185.205.52.194/32 }
   - { v: ipv6, cidr: "::1" }
   - { v: ipv6, cidr: "fe80::/10" }