diff --git a/ddns/update.sh b/ddns/update.sh
new file mode 100644
index 0000000..50f96fd
--- /dev/null
+++ b/ddns/update.sh
@@ -0,0 +1,67 @@
+#!/bin/bash
+
+INTERVAL=60
+
+dnsrecord="$DNS_RECORD"
+zone="$DNS_ZONE"
+
+cloudflare_token="$CLOUDFLARE_API_TOKEN"
+
+# get the zone id for the requested zone
+zoneid=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones?name=$zone&status=active" \
+  -H "Authorization: Bearer $cloudflare_token" \
+  -H "Content-Type: application/json" | jq -r '{"result"}[] | .[0] | .id')
+
+if [ "$zoneid" == "null" ]; then
+  echo "Zone not found, is your CloudFlare API key correct?"
+  exit 1
+fi
+
+while true
+do
+
+wan_ip4=`dig @resolver4.opendns.com A myip.opendns.com +short -4`
+wan_ip6=`dig @resolver1.ipv6-sandbox.opendns.com AAAA myip.opendns.com +short -6`
+
+# update IPV4 record
+published_ip4=`dig $dnsrecord A +short`
+published_ip6=`dig $dnsrecord AAAA +short`
+
+if [ "$published_ip4" != "$wan_ip4" ]; then
+  echo "Updating $dnsrecord (zone $zoneid) A record from [$published_ip4] to [$wan_ip4]..."
+  dnsrecordid=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zoneid/dns_records?type=A&name=$dnsrecord" \
+    -H "Authorization: Bearer $cloudflare_token" \
+    -H "Content-Type: application/json" | jq -r '{"result"}[] | .[0] | .id')
+  if [ "$dnsrecordid" == "null" ]; then
+    curl -s -X POST "https://api.cloudflare.com/client/v4/zones/$zoneid/dns_records" \
+      -H "Authorization: Bearer $cloudflare_token" \
+      -H "Content-Type: application/json" \
+      --data "{\"type\":\"A\",\"name\":\"$dnsrecord\",\"content\":\"$wan_ip4\",\"ttl\":1,\"proxied\":false}" | jq
+  else
+    curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$zoneid/dns_records/$dnsrecordid" \
+      -H "Authorization: Bearer $cloudflare_token" \
+      -H "Content-Type: application/json" \
+      --data "{\"type\":\"A\",\"name\":\"$dnsrecord\",\"content\":\"$wan_ip4\",\"ttl\":1,\"proxied\":false}" | jq
+  fi
+fi
+
+if [ "$published_ip6" != "$wan_ip6" ]; then
+  echo "Updating $dnsrecord (zone $zoneid) AAAA record from [$published_ip6] to [$wan_ip6]..."
+  dnsrecordid=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zoneid/dns_records?type=AAAA&name=$dnsrecord" \
+    -H "Authorization: Bearer $cloudflare_token" \
+    -H "Content-Type: application/json" | jq -r '{"result"}[] | .[0] | .id')
+  if [ "$dnsrecordid" == "null" ]; then
+    curl -s -X POST "https://api.cloudflare.com/client/v4/zones/$zoneid/dns_records" \
+      -H "Authorization: Bearer $cloudflare_token" \
+      -H "Content-Type: application/json" \
+      --data "{\"type\":\"AAAA\",\"name\":\"$dnsrecord\",\"content\":\"$wan_ip6\",\"ttl\":1,\"proxied\":false}" | jq
+  else
+    curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$zoneid/dns_records/$dnsrecordid" \
+      -H "Authorization: Bearer $cloudflare_token" \
+      -H "Content-Type: application/json" \
+      --data "{\"type\":\"AAAA\",\"name\":\"$dnsrecord\",\"content\":\"$wan_ip6\",\"ttl\":1,\"proxied\":false}" | jq
+  fi
+fi
+
+sleep $INTERVAL
+done