diff --git a/.phpstan/init.php b/.phpstan/init.php
index 73640957..47cb7444 100644
--- a/.phpstan/init.php
+++ b/.phpstan/init.php
@@ -7,6 +7,7 @@ require '/usr/share/php/phpseclib/autoload.php';
 require 'CAS.php';
 require 'Mail.php';
 require 'Mail/mime.php';
+require 'Html2Text.php';
 
 spl_autoload_register(array('LSsession', 'loadLSclass'));
 LSsession :: initialize();