diff --git a/defaults/main.yml b/defaults/main.yml
index 1870587..f97a546 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -52,6 +52,8 @@ blocky__custom_domain: {}
 
 # Add hosts from inventory to blocky custom dns (default=false)
 blocky__hosts_dns_enabled: false
+# Which inventory group for adding hosts
+blocky__hosts_dns_invenory_group: all
 # NOTE: to ignore an host, add `blocky__hosts_dns_ignore=true` to its host_vars
 blocky__hosts_dns_ignore: false
 # Optional domain to append to the custom DNS entry.
diff --git a/templates/config.yaml.j2 b/templates/config.yaml.j2
index 3b59480..8263421 100644
--- a/templates/config.yaml.j2
+++ b/templates/config.yaml.j2
@@ -1,7 +1,7 @@
 # {{ ansible_managed }}
 {% if blocky__hosts_dns_enabled -%}
 # Added to blocky__custom_dns from inventory due to blocky__hosts_dns_enabled=true
-{% for host in groups["all"] -%}
+{% for host in groups[blocky__hosts_dns_invenory_group] -%}
 {% set fqdn = host + blocky__hosts_dns_domain %}
 {% if (hostvars[host]["blocky__hosts_dns_ignore"] is undefined or not hostvars[host]["blocky__hosts_dns_ignore"])
   and fqdn not in blocky__custom_dns