diff --git a/fogcutter/docker/firefly.sh b/fogcutter/docker/firefly.sh
index d6c9a6b..ed646b3 100755
--- a/fogcutter/docker/firefly.sh
+++ b/fogcutter/docker/firefly.sh
@@ -2,6 +2,9 @@
 
 set -e
 
+# Don't forget cron!
+# https://docs.firefly-iii.org/firefly-iii/advanced-installation/cron/
+
 up () {
   docker network create pew-net || true