handler.go | 2 +-

diff --git a/handler.go b/handler.go
index 0cfb5cff43694208de1f0f86a5327a1bec517e09151266527d7edfd14efe42b9..56e24cbcb708a64d642269f9903e6ad999c811139d4d668466df8c491caf04e7 100644
--- a/handler.go
+++ b/handler.go
@@ -307,7 +307,7 @@
 	if contentType == "" {
 		contentType = mediaType(path.Base(pth), cfg.MIMEs)
 	}
-	contentTypeBase := strings.SplitN(contentType, ";", 2)[0]
+	contentTypeBase, _, _ := strings.Cut(contentType, ";")
 	w.Header().Set("Content-Type", contentType)
 
 	if etag != "" {