CAA RR type

[rams]

Hi.
I have zone file as follows

$ORIGIN rameshtest-caa.com.
$TTL 86400      ; 1 day
@                       IN      SOA     ns1.rameshtest-caa.com.
root.rameshtest-caa.com. (
                                2009040114 ; serial
                                3600       ; refresh (1 hour)
                                900        ; retry (15 minutes)
                                1814400    ; expire (3 weeks)
                                900        ; minimum (15 minutes)
                                                )
                IN      NS      ns1.rameshtest-caa.com.
                IN      A       1.1.1.1
ns1             IN      A       1.2.3.4
a               IN      A       2.2.2.2
aaaa            IN      AAAA    3FFE:0B80:0444:0004:0000:0000:0000:0004
caa             IN      CAA     0 issue "ca.example.net"
caa1            IN     CAA     0 iodef "mailto:security at example.com"
caa2            IN     CAA     0 iodef "http://iodef.example.com/"

When I start named, getting the following error:

/var/named/zones/rameshtest-caa.com:15: unknown RR type 'CAA'
/var/named/zones/rameshtest-caa.com:16: unknown RR type 'CAA'
/var/named/zones/rameshtest-caa.com:17: unknown RR type 'CAA'
zone rameshtest-caa.com/IN: loading from master file /var/named/zones/
rameshtest-caa.com failed: unknown class/type
_default/rameshtest-caa.com/IN: unknown class/type
                                                           [FAILED]


I am using bind 9.6. Did I miss/mistake  anything here? Could you please
guide me to work for CAA.

Thanks & Regards,
Ramesh
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