diff --git a/ebitenutil/file_js.go b/ebitenutil/file_js.go
index 9c6be7eb4..d477eb795 100644
--- a/ebitenutil/file_js.go
+++ b/ebitenutil/file_js.go
@@ -40,6 +40,7 @@ func OpenFile(path string) (ReadSeekCloser, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer res.Body.Close()
 	body, err := io.ReadAll(res.Body)
 	if err != nil {
 		return nil, err