diff --git a/bin/backuptool b/bin/backuptool
index 3c21e3d..0ec0d5e 100755
--- a/bin/backuptool
+++ b/bin/backuptool
@@ -172,22 +172,22 @@ backup_allservices() {
       rm /federated/apps/pdnsadmin/dump_$i.sql.gz
     elif [ "$i" = "castopod" ]; then
       docker exec pdnsmysql mysqldump -uroot -p${MYSQL_PASSWORD} castopod | gzip -9 > /federated/apps/castopod/dump_$i.sql.gz
-      PASSPHRASE=$GPG_PASSPHRASE duplicity /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
+      PASSPHRASE=$GPG_PASSPHRASE duplicity --full-if-older-than 1M /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
       [ $? -ne 0 ] && failcheck "* Couldn't backup files"
       rm /federated/apps/castopod/dump_$i.sql.gz
     elif [ "$i" = "wordpress" ]; then
       docker exec pdnsmysql mysqldump -uroot -p${MYSQL_PASSWORD} wordpress | gzip -9 > /federated/apps/wordpress/dump_$i.sql.gz
-      PASSPHRASE=$GPG_PASSPHRASE duplicity /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
+      PASSPHRASE=$GPG_PASSPHRASE duplicity --full-if-older-than 1M /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
       [ $? -ne 0 ] && failcheck "* Couldn't backup files"
       rm /federated/apps/wordpress/dump_$i.sql.gz
     elif [ "$i" = "bookstack" ]; then
       docker exec pdnsmysql mysqldump -uroot -p${MYSQL_PASSWORD} bookstack | gzip -9 > /federated/apps/bookstack/dump_$i.sql.gz
-      PASSPHRASE=$GPG_PASSPHRASE duplicity /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
+      PASSPHRASE=$GPG_PASSPHRASE duplicity --full-if-older-than 1M /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
       [ $? -ne 0 ] && failcheck "* Couldn't backup files"
       rm /federated/apps/bookstack/dump_$i.sql.gz
     elif [ "$i" = "espocrm" ]; then
       docker exec pdnsmysql mysqldump -uroot -p${MYSQL_PASSWORD} espocrm | gzip -9 > /federated/apps/espocrm/dump_$i.sql.gz
-      PASSPHRASE=$GPG_PASSPHRASE duplicity /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
+      PASSPHRASE=$GPG_PASSPHRASE duplicity --full-if-older-than 1M /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
       [ $? -ne 0 ] && failcheck "* Couldn't backup files"
       rm /federated/apps/espocrm/dump_$i.sql.gz
     else
@@ -197,7 +197,7 @@ backup_allservices() {
         [ $? -ne 0 ] && failcheck "* Couldn't pg_dump files"
         mv /federated/apps/postgresql/data/docker-entrypoint-initdb.d/dump_$i.sql.gz /federated/apps/$i/
       fi
-      PASSPHRASE=$GPG_PASSPHRASE duplicity /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
+      PASSPHRASE=$GPG_PASSPHRASE duplicity --full-if-older-than 1M /federated/apps/$i b2://$B2_APPLICATION_KEY_ID:$B2_APPLICATION_KEY@fed-customers/$UUID/federated/apps/$i/
       [ $? -ne 0 ] && failcheck "* Couldn't backup files"
       [ -f "/federated/apps/$i/dump_$i.sql.gz" ] && rm /federated/apps/$i/dump_$i.sql.gz
     fi