diff --git a/common.php b/common.php
index 633b031f..26ef9398 100644
--- a/common.php
+++ b/common.php
@@ -20,6 +20,8 @@ if(!defined('POSTFIXADMIN')) { # already defined if called from setup.php
     define('POSTFIXADMIN', 1); # checked in included files
 
     if (!defined('POSTFIXADMIN_CLI')) {
+        // this is the default; see also https://sourceforge.net/p/postfixadmin/bugs/347/
+        session_cache_limiter('nocache'); 
         session_start();
 
         if (defined('POSTFIXADMIN_LOGOUT')) {