diff --git a/readme.txt b/readme.txt
index 19df30b..b05bbb3 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: m_uysl, handyplugins
 Tags: wonder, cache, speed, performance, load, server, batcache
 Requires at least: 4.7
 Requires PHP: 5.6
-Tested up to: 6.4
+Tested up to: 6.6
 Stable tag: 0.5
 License: GPLv2 or later
 License URI: https://www.gnu.org/licenses/gpl-2.0.html