diff --git a/src/ApacheMimetypeHelper.php b/src/ApacheMimetypeHelper.php
index fdb19a8..764dd7c 100644
--- a/src/ApacheMimetypeHelper.php
+++ b/src/ApacheMimetypeHelper.php
@@ -91,6 +91,7 @@ public function getMimetypeFromExtension($extension)
             'pbm' => 'image/x-portable-bitmap',
             'pdf' => 'application/pdf',
             'pgm' => 'image/x-portable-graymap',
+            'pkpass' => 'application/vnd.apple.pkpass',
             'png' => 'image/png',
             'pnm' => 'image/x-portable-anymap',
             'ppm' => 'image/x-portable-pixmap',