diff --git a/README.md b/README.md
index 83189bf9efa9e37285c2aadbd610919da97d5e42..c528f71b48846e10413e512dd974dd59219d6a3f 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ With the credentials, you can update the TXT response in the service to match th
     "allowfrom": [
         "192.168.100.1/24",
         "1.2.3.4/32",
-        "2002:c0a8:2a01::0/32",
+        "2002:c0a8:2a00::0/40",
 }
 ```