diff --git a/sshdyndns b/sshdyndns
index 7c0ed28..91ffaa1 100755
--- a/sshdyndns
+++ b/sshdyndns
@@ -27,6 +27,7 @@ use Pod::Usage;
 my $port = 53;
 my $ttl = 3600;
 my $help = 0;
+my $tsigalgo = 'hmac-md5';
 my ($tsigname, $tsigkey, $server, $verbose, $tsig);
 my ($old_rr, $new_rr, $update, $resolver, $reply, $ip);
 
@@ -36,7 +37,8 @@ GetOptions("help|?" => \$help,
 	   "server=s" => \$server,
 	   "ttl=i" => \$ttl,
 	   "tsigname=s" => \$tsigname,
-	   "tsigkey=s" => \$tsigkey)
+	   "tsigkey=s" => \$tsigkey,
+	   "tsigalgo=s" => \$tsigalgo)
     or die("Error in command line arguments\n");
 
 pod2usage(1) if ($help or scalar(@ARGV) != 2);
@@ -72,6 +74,7 @@ if (defined $old_rr && defined $new_rr) {
 
 if (defined $tsigname && defined $tsigkey) {
     $tsig =  Net::DNS::RR::TSIG->create($tsigname, $tsigkey);
+    $tsig->algorithm($tsigalgo);
     say $tsig->string if ($verbose);
     $update->push( additional => $tsig);
 }
@@ -114,6 +117,7 @@ dnsupdate_tlsa [options] zone dnsname
     -port	DNS port
     -tsigname	Name of tsig key
     -tsigkey	tsig key
+    -tsigalgo	tsig algorithm
 
 =head1 OPTIONS