diff --git a/src/functions.php b/src/functions.php
index 957bfb42..8e6dafe6 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -724,6 +724,7 @@ function mimetype_from_extension($extension)
         'txt' => 'text/plain',
         'wav' => 'audio/x-wav',
         'webm' => 'video/webm',
+        'webp' => 'image/webp',
         'wma' => 'audio/x-ms-wma',
         'wmv' => 'video/x-ms-wmv',
         'woff' => 'application/x-font-woff',