diff --git a/arch.go b/arch.go
index 8867e73..68560fb 100644
--- a/arch.go
+++ b/arch.go
@@ -43,6 +43,8 @@ func Compress(archPath, contentDir string) error {
 
 	toolCmd := exec.Command(
 		toolPath,
+		"-tzip",
+		"-mx=0",
 		"a", archPath,
 		contentDir+string(filepath.Separator)+"*",
 	)
diff --git a/media.go b/media.go
index 3c09fd1..5db4288 100644
--- a/media.go
+++ b/media.go
@@ -37,7 +37,7 @@ func parseVolumeIndex(path string) *int {
 
 func isImagePath(path string) bool {
 	switch strings.ToLower(filepath.Ext(path)) {
-	case ".jpg", ".jpeg", ".png", ".webp", ".bmp", ".gif":
+	case ".jpg", ".jpeg", ".png", ".webp", ".bmp", ".gif", ".avif":
 		return true
 	default:
 		return false