diff --git a/README.md b/README.md
index 0d0f347..ddf7e2e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,11 @@
 # debuntu-toolkit
 Miscellaneous scripts for system admin
+
+### cfddnsv6
+This script updates CloudFlare IPv6 DNS records with your current IP address, as pulled from the interface directly. Best use case is having an ISP who arbitrarily changes your prefix.  For safety, we do not create records, we only update records that match the hostname in the zone, so you must log in to CloudFlare and create your records first!
+Right now we run this from cron--- at reboot and every so often after. This example runs it at reboot and every half hour, adjust to taste.
+```
+@reboot /usr/local/bin/cfddnsv6.sh >/dev/null 2>&1
+*/30 * * * * /usr/local/bin/cfddnsv6.sh >/dev/null 2>&1
+```
+