diff --git a/src/etc/cron.d/alternc-certbot b/src/etc/cron.d/alternc-certbot
new file mode 100755
index 0000000..d72a740
--- /dev/null
+++ b/src/etc/cron.d/alternc-certbot
@@ -0,0 +1,5 @@
+# Every day at 2am, compute web, mail and db space usage per account.
+# You may put this computing every week only or on your filer on busy services.
+0 */12 * * *  root /usr/lib/alternc/install.d/alternc-certbot
+
+