diff --git a/docker-compose.yml.example b/docker-compose.yml.example
index b8e1622..1369647 100644
--- a/docker-compose.yml.example
+++ b/docker-compose.yml.example
@@ -11,5 +11,5 @@ services:
       - MYSQL_ENV_MYSQL_PASSWORD=phpipamadmin
       - MYSQL_ENV_MySQL_PORT=3306
       - PHPIPAM_AGENT_KEY=2RuQ0rt4Rir29vGN4_1ZOqShcUX7PSUb
-      - CRON_SCHEDULE=*/15 * * * *
+      - SCAN_INTERVAL=15m
       - TZ=UTC
diff --git a/entrypoint.sh b/entrypoint.sh
index 2188272..106831e 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,10 +1,31 @@
 #!/bin/sh
 set -e
 
-[ -z "$CRON_SCHEDULE" ] && CRON_SCHEDULE="*/15 * * * *"
+case "$SCAN_INTERVAL" in
+  5m)  CRON_S="*/5 *"
+  ;;
+  10m) CRON_S="*/10 *"
+  ;;
+  15m) CRON_S="*/15 *"
+  ;;
+  30m) CRON_S="*/30 *"
+  ;;
+  1h)  CRON_S="0 *"
+  ;;
+  2h)  CRON_S="0 */2"
+  ;;
+  4h)  CRON_S="0 */4"
+  ;;
+  6h)  CRON_S="0 */6"
+  ;;
+  12h) CRON_S="0 */12"
+  ;;
+  *)   CRON_S="0 *"
+  ;;
+esac
 
-echo "$CRON_SCHEDULE /usr/local/bin/php /opt/phpipam-agent/index.php update > /proc/self/fd/1 2>/proc/self/fd/2" > $CRONTAB_FILE
-echo "$CRON_SCHEDULE /usr/local/bin/php /opt/phpipam-agent/index.php discover > /proc/self/fd/1 2>/proc/self/fd/2" >> $CRONTAB_FILE
+echo "$CRON_S /usr/local/bin/php /opt/phpipam-agent/index.php update > /proc/self/fd/1 2>/proc/self/fd/2" > $CRONTAB_FILE
+echo "$CRON_S /usr/local/bin/php /opt/phpipam-agent/index.php discover > /proc/self/fd/1 2>/proc/self/fd/2" >> $CRONTAB_FILE
 chmod 0644 $CRONTAB_FILE
 
 exec "$@"