diff --git a/dnscrypt-proxy/dnscrypt-proxy.toml b/dnscrypt-proxy/dnscrypt-proxy.toml
index 96465768..411a1051 100644
--- a/dnscrypt-proxy/dnscrypt-proxy.toml
+++ b/dnscrypt-proxy/dnscrypt-proxy.toml
@@ -66,6 +66,7 @@ format = "tsv"
 #   *sex*
 #   ads.*
 #   ads*.example.*
+#   ads*.example[0-9]*.com
 [block_name]
 ## Full path to the file of blocking rules
 file = "blacklist.txt"