diff --git a/debian/templates/zebra-biblios-site.cfg.in b/debian/templates/zebra-biblios-site.cfg.in
index 5402f37b9d..fea467fe39 100644
--- a/debian/templates/zebra-biblios-site.cfg.in
+++ b/debian/templates/zebra-biblios-site.cfg.in
@@ -44,8 +44,8 @@ lockDir: /var/lock/koha/__KOHASITE__/biblios
 perm.anonymous:ar
 perm.kohauser:rw
 passwd: /etc/koha/sites/__KOHASITE__/zebra.passwd
-register: /var/lib/koha/__KOHASITE__/biblios/register:4G
-shadow: /var/lib/koha/__KOHASITE__/biblios/shadow:4G
+register: /var/lib/koha/__KOHASITE__/biblios/register:20G
+shadow: /var/lib/koha/__KOHASITE__/biblios/shadow:20G
 
 # Temp File area for result sets
 setTmpDir: /var/lib/koha/__KOHASITE__/biblios/tmp