diff --git a/images/fetch-course-emails/Dockerfile b/images/fetch-course-emails/Dockerfile
index 0fe097e2..939af1d7 100644
--- a/images/fetch-course-emails/Dockerfile
+++ b/images/fetch-course-emails/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:19.04
+FROM ubuntu:20.04
 
 RUN apt-get update && \
 	apt-get install -y --no-install-recommends \
@@ -15,5 +15,6 @@ ADD requirements.txt /tmp/requirements.txt
 RUN pip3 install --no-cache-dir -r /tmp/requirements.txt
 
 ADD course-emails.py /usr/local/bin/
+ADD save-course-emails.sh /usr/local/bin/
 
-CMD ["/usr/local/bin/course-emails.py", "-v"]
+CMD ["/usr/local/bin/save-course-emails.sh"]
diff --git a/images/fetch-course-emails/requirements.txt b/images/fetch-course-emails/requirements.txt
index 0b8af2e5..de1cb65b 100644
--- a/images/fetch-course-emails/requirements.txt
+++ b/images/fetch-course-emails/requirements.txt
@@ -1,4 +1,5 @@
-aiohttp==3.5.4
-ruamel.yaml==0.16.0
+aiohttp==3.7.3
+ruamel.yaml==0.16.12
+yq==2.12.0
 git+https://github.com/ryanlovett/sis-cli.git@1635650
 git+https://github.com/ryanlovett/ucbhr.git@48975fb
diff --git a/images/fetch-course-emails/save-course-emails.sh b/images/fetch-course-emails/save-course-emails.sh
new file mode 100755
index 00000000..d0d9645f
--- /dev/null
+++ b/images/fetch-course-emails/save-course-emails.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# set -e
+
+# all hub configuration
+config_values="/etc/jupyterhub/config/values.yaml"
+
+# output location
+profile_dir="/srv/jupyterhub/profiles.d"
+
+course_emails="/usr/local/bin/course-emails.py"
+
+# space 24 hours apart; TODO: guessing k8s can loop this for us somehow
+sleep_time=86400
+
+while true ; do
+
+	if [ ! -f $custom_profiles ]; then
+		echo "No such file: $custom_profiles"
+	else
+
+		if [ ! -d $profile_dir ]; then mkdir -p $profile_dir ; fi
+
+		profiles=`cat ${config_values} | yq .custom.profiles | jq -r 'keys[]'`
+		echo profiles: ${profiles}
+
+		# write out email lists for each profile
+		for profile in ${profiles} ; do
+			for people in students instructors ; do
+				filename="${profile_dir}/${profile}-${people}.txt"
+				# write to tempfile because gathering addresses takes time
+				# and we don't want the hub to read an abbreviated list
+				outfile=`mktemp`
+				echo $profile $people $outfile
+				$course_emails $profile $people > $outfile
+				if [ -f $outfile ]; then mv $outfile $filename ; fi
+			done
+		done
+	fi
+
+	sleep $sleep_time
+done