diff --git a/app/bin/home/backup b/app/bin/home/backup
index c0cf4fe..fc7ee4a 100755
--- a/app/bin/home/backup
+++ b/app/bin/home/backup
@@ -36,7 +36,7 @@ builtin cd "$path_src"
 
 # backup docker.
 rm $path_docker/${dow}_*.tgz
-/usr/bin/tar --exclude-from=docker/.tarignore -c docker | /usr/bin/gzip -1 > $path_docker/docker.tar.gz && mv $path_docker/docker.tar.gz $path_docker/${dow}_${date}-$(/usr/bin/sha1sum $path_docker/docker.tar.gz | cut -d\  -f1).tar.gz || notify 'backup : docker failed'
+/usr/bin/tar --exclude-from=docker/.tarignore -c docker | /usr/bin/gzip -1 > $path_docker/docker.tgz && mv $path_docker/docker.tgz $path_docker/${dow}_${date}-$(/usr/bin/sha1sum $path_docker/docker.tgz | cut -d\  -f1).tgz || notify 'backup : docker failed'
 
 # copy media.
 /usr/bin/rsync -a --delete /var/mnt/storage/hot/media/music/  /var/mnt/backup/backup/music/  || notify 'backup : copy music failed'
@@ -50,6 +50,6 @@ rm $path_docker/${dow}_*.tgz
 #/usr/bin/rsync -ahP -e 'ssh -p 143 -i /var/roothome/document/key/ssh/pi.key' /var/mnt/backup/ root@192.168.1.6:/var/mnt/backup/ || notify 'backup : failed upload'
 
 # notify completion & size.
-bupsize=$(/usr/bin/du -h $path_docker/${dow}_*.tar.gz | awk '{print $1}')
+bupsize=$(/usr/bin/du -h $path_docker/${dow}_*.tgz | awk '{print $1}')
 notify_silent "backup : complete : $bupsize"
 echo "backup : complete : $bupsize"