diff --git a/foxes.php b/foxes.php
index becebef..1d8a35f 100644
--- a/foxes.php
+++ b/foxes.php
@@ -109,7 +109,7 @@ function mime2ext($mime) {
             'application/x-pkcs7-certreqresp'                                           => 'p7r',
             'application/pkcs7-signature'                                               => 'p7s',
             'application/pdf'                                                           => 'pdf',
-            'application/octet-stream'                                                  => 'pdf',
+            'application/octet-stream'                                                  => 'bin',
             'application/x-x509-user-cert'                                              => 'pem',
             'application/x-pem-file'                                                    => 'pem',
             'application/pgp'                                                           => 'pgp',
@@ -145,6 +145,11 @@ function mime2ext($mime) {
             'application/x-shockwave-flash'                                             => 'swf',
             'application/x-tar'                                                         => 'tar',
             'application/x-gzip-compressed'                                             => 'tgz',
+            'application/x-gzip'                                                        => 'gz',
+            'application/gzip'                                                          => 'gz',
+            'application/x-xz'                                                          => 'xz',
+            'application/xz'                                                            => 'xz',
+            'application/zstd'                                                          => 'zstd',
             'image/tiff'                                                                => 'tiff',
             'text/plain'                                                                => 'txt',
             'text/x-vcard'                                                              => 'vcf',