diff --git a/README.md b/README.md
index 7d195aa..ab08075 100644
--- a/README.md
+++ b/README.md
@@ -4,12 +4,13 @@
 
 ## Sample pillars
 
-ISC DHCP server
+ISC DHCP server with defined host and subnet (client must use the same key)
 
     isc_dhcp:
       server:
         enabled: true
         omapi_port: 7911
+        omapi_key: iFdQ0kvpUo+3gzXGJTpjk7/dl9DI5SuDqMzasDUhBRGEg6VfNYUX+MAU14WoJJZDQbrvC4Pgsdfdsfdsfdsdf==
         authoritative: true
         interfaces:
         - name: eth0
@@ -22,7 +23,15 @@
             mac: 00:11:22:33:44:55:66
             address: 192.168.0.1
             hostname: domain.com
+        subnet:
+          testsubnet:
+            range: 10.0.0.1 10.0.0.100
+            netmask: 255.255.255.0
+            network: 10.0.0.0
+            pxeserver: 10.1.1.1
+
+
 
 ## Read more
 
-* http://chschneider.eu/linux/server/tftpd-hpa.shtml
\ No newline at end of file
+* http://chschneider.eu/linux/server/tftpd-hpa.shtml
diff --git a/isc_dhcp/files/dhcpd.conf b/isc_dhcp/files/dhcpd.conf
index ec97e4c..8cfe205 100644
--- a/isc_dhcp/files/dhcpd.conf
+++ b/isc_dhcp/files/dhcpd.conf
@@ -5,6 +5,14 @@
 omapi-port {{ server.omapi_port }};
 {% endif -%}
 
+{- if server.omapi_key and server.omapi_port is defined %}
+key omapi_key {
+ algorithm HMAC-MD5;
+ secret "{{ server.omapi_key }}";
+};
+omapi-key omapi_key;
+{%- endif %}
+
 {%- if server.ddns_updates is defined %}
 
 ddns-updates on;
@@ -91,4 +99,4 @@
 include "{{ server.config_dir }}/dhcpd.hosts";
 include "{{ server.config_dir }}/dhcpd.subnets";
 
-{%- endif %}
\ No newline at end of file
+{%- endif %}