diff --git a/home/update.sh b/home/update.sh
index 9f5d09c..ff58d53 100755
--- a/home/update.sh
+++ b/home/update.sh
@@ -4,6 +4,6 @@ OSM_DUMP_FILE=${OSM_DUMP_FILE:-/home/data.osm.pbf}
 
 cd /home/valhalla
 valhalla_build_tiles -c /home/valhalla.json $OSM_DUMP_FILE
-find valhalla_tiles | sort -n | tar cf valhalla_tiles2.tar --no-recursion -T -
+find valhalla_tiles | sort -n | tar cf valhalla_tiles.$$.tar --no-recursion -T -
 rm -rf valhalla_tiles *.bin *.txt
-mv valhalla_tiles2.tar valhalla_tiles.tar
+mv valhalla_tiles.$$.tar valhalla_tiles.tar