diff --git a/run-restic.sh b/run-restic.sh
index 109908b..a9022ca 100755
--- a/run-restic.sh
+++ b/run-restic.sh
@@ -51,7 +51,7 @@ fi
 # run the snapshot
 ARGS="-r $DST --password-file $PW backup --tag $TAG --exclude-file=/restic.excludes --files-from /restic.files"
 # clean up old snapshots
-CLEAN="-r $DST --password-file $PW forget --prune --tag $TAG --keep-daily 4 --keep-weekly 3 --keep-monthly 6 --keep-yearly 3"
+CLEAN="-r $DST --password-file $PW forget --prune --cleanup-cache --tag $TAG --keep-daily 4 --keep-weekly 3 --keep-monthly 6 --keep-yearly 3"
 # prune 'forgotten' snapshots
 PRUNE="-r $DST --password-file $PW prune 
 # create a snapshot