diff --git a/debian/combo.cron.hourly b/debian/combo.cron.hourly
index 0ca14028..e1d253d8 100644
--- a/debian/combo.cron.hourly
+++ b/debian/combo.cron.hourly
@@ -2,4 +2,5 @@
 
 /sbin/runuser -u combo /usr/bin/combo-manage -- tenant_command cron --all-tenants
 /sbin/runuser -u combo /usr/bin/combo-manage -- tenant_command clearsessions --all-tenants
-/sbin/runuser -u combo /usr/bin/combo-manage -- tenant_command update_index --remove --all-tenants -v0
+# update_index cannot be used due to some bug in haystack/whoosh (#30509)
+/sbin/runuser -u combo /usr/bin/combo-manage -- tenant_command rebuild_index --noinput --remove --all-tenants -v0