ddns-update-style none;
ignore client-updates;
authoritative;

subnet 192.168.4.0 netmask 255.255.252.0 {
        range 192.168.5.2 192.168.5.250;
        default-lease-time 3600;
        max-lease-time 86400;
        option domain-name "oslo.lan";
        option routers 192.168.4.1;
        option ip-forwarding off;
        option broadcast-address 192.168.7.255;
        option subnet-mask 255.255.252.0;
        option domain-name-servers 192.168.4.1, 8.8.8.8;

	host zed {
		hardware ethernet 00:19:99:6A:1C:BA;
		fixed-address 192.68.4.53;
	}
}


Still i'm getting this:

Feb  7 16:51:22 gateway dhcpd: DHCPRELEASE of 192.168.5.233 from 00:19:99:6a:1c:ba (zed) via eth1 (found)
Feb  7 16:51:24 gateway dhcpd: DHCPDISCOVER from 00:19:99:6a:1c:ba via eth1
Feb  7 16:51:25 gateway dhcpd: DHCPOFFER on 192.168.5.233 to 00:19:99:6a:1c:ba (zed) via eth1
Feb  7 16:51:25 gateway dhcpd: DHCPREQUEST for 192.168.5.233 (192.168.4.1) from 00:19:99:6a:1c:ba (zed) via eth1
Feb  7 16:51:25 gateway dhcpd: DHCPACK on 192.168.5.233 to 00:19:99:6a:1c:ba (zed) via eth1