diff --git a/apps/snapshots.go b/apps/snapshots.go
index 743262e..4c00507 100644
--- a/apps/snapshots.go
+++ b/apps/snapshots.go
@@ -147,7 +147,7 @@ func (s *SnapshotProcessor) CreateSnapshot(appName string, labels []string) (str
 		return snapshot.KeyName(s.IndexLabel), fmt.Errorf("saving metadata error: %v", err)
 	}
 
-	tmpSnapshotArchivePath := path.Join(s.TmpSnapshotPath, snapshot.KeyName(s.IndexLabel)+".zip")
+	tmpSnapshotArchivePath := path.Join(s.TmpSnapshotPath, snapshot.KeyName(s.IndexLabel)+".tar.zst")
 
 	err = os.Chdir(path.Join(s.AppsPath, appName))
 	if err != nil {
@@ -186,7 +186,7 @@ func (s *SnapshotProcessor) CreateSnapshot(appName string, labels []string) (str
 // If you need a new app from existing snapshot just create it.
 // This restores only content on the disk, doesn't create the container.
 func (s *SnapshotProcessor) RestoreSnapshot(key string, newAppName string) error {
-	tmpSnapshotArchivePath := path.Join(s.TmpSnapshotPath, key+".zip")
+	tmpSnapshotArchivePath := path.Join(s.TmpSnapshotPath, key+".tar.zst")
 
 	err := os.MkdirAll(path.Join(s.AppsPath, newAppName), 0755)
 	if err != nil {