diff --git a/src/Dropbox/DropboxFile.php b/src/Dropbox/DropboxFile.php
index 551aa6a..4b9c225 100644
--- a/src/Dropbox/DropboxFile.php
+++ b/src/Dropbox/DropboxFile.php
@@ -331,6 +331,6 @@ public function getSize()
      */
     public function getMimetype()
     {
-        return \GuzzleHttp\Psr7\mimetype_from_filename($this->path) ?: 'text/plain';
+        return \GuzzleHttp\Psr7\MimeType::fromFilename($this->path) ?: 'text/plain';
     }
 }