diff --git a/readme.txt b/readme.txt
index d937e0d..90990e7 100644
--- a/readme.txt
+++ b/readme.txt
@@ -9,8 +9,8 @@ Contributors:      johnjamesjacoby, flixos90, rmccue, spacedmonkey
 Tags:              network, sites, domains, global, admin
 Requires PHP:      5.2
 Requires at least: 4.9
-Tested up to:      5.9
-Stable tag:        2.5.1
+Tested up to:      6.1
+Stable tag:        2.5.2
 
 == Description ==
 
@@ -122,6 +122,10 @@ please follow the steps in https://paulund.co.uk/wordpress-multisite-nested-path
 Not much to talk about really. Check the code for details!
 
 == Changelog ==
+= 2.5.2 =
+* Use get_main_site_id function instead of get_main_site_for_network.
+* Tested against WordPress 6.1.
+
 = 2.5.1 =
 * Save main site on network as network option. 
 
diff --git a/wpmn-loader.php b/wpmn-loader.php
index 98864dd..11d970f 100644
--- a/wpmn-loader.php
+++ b/wpmn-loader.php
@@ -17,8 +17,8 @@
  * Network:           true
  * Requires at least: 4.9
  * Requires PHP:      5.2
- * Tested up to:      5.8
- * Version:           2.5.1
+ * Tested up to:      6.1
+ * Version:           2.5.2
  */
 
 // Exit if accessed directly.