storage/bolt-piece-completion.go | 2 +-
 storage/mmap.go                  | 2 +-

diff --git a/storage/bolt-piece-completion.go b/storage/bolt-piece-completion.go
index 43417f20c476b1f116f01542b0ce8906752952af..52713ea8c10f726e629aedca392186fc4a9c09f9 100644
--- a/storage/bolt-piece-completion.go
+++ b/storage/bolt-piece-completion.go
@@ -30,7 +30,7 @@
 var _ PieceCompletion = (*boltPieceCompletion)(nil)
 
 func NewBoltPieceCompletion(dir string) (ret PieceCompletion, err error) {
-	os.MkdirAll(dir, 0770)
+	os.MkdirAll(dir, 0750)
 	p := filepath.Join(dir, ".torrent.bolt.db")
 	db, err := bbolt.Open(p, 0660, &bbolt.Options{
 		Timeout: time.Second,
diff --git a/storage/mmap.go b/storage/mmap.go
index 9c9e84710137f73a662c2def304316badaea0470..1b1423f7a9e73904e4a7e9fcd44cb462ef9f2878 100644
--- a/storage/mmap.go
+++ b/storage/mmap.go
@@ -132,7 +132,7 @@ }
 
 func mmapFile(name string, size int64) (ret mmap.MMap, err error) {
 	dir := filepath.Dir(name)
-	err = os.MkdirAll(dir, 0777)
+	err = os.MkdirAll(dir, 0750)
 	if err != nil {
 		err = fmt.Errorf("making directory %q: %s", dir, err)
 		return