diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed97fedb..6b692f91 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## [0.8.6-dev - 05.07.2021]
+This update contains security fix.
+
+Please update your AACs to this version.
+
 ## [0.8.5 - 08.06.2021]
 
 ### Changed
diff --git a/VERSION b/VERSION
index bbde4bee..f6db2227 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.8.5
\ No newline at end of file
+0.8.6-dev
diff --git a/common.php b/common.php
index bf10df26..852fc40a 100644
--- a/common.php
+++ b/common.php
@@ -27,7 +27,7 @@ if (version_compare(phpversion(), '5.6', '<')) die('PHP version 5.6 or higher is
 session_start();
 
 define('MYAAC', true);
-define('MYAAC_VERSION', '0.8.5');
+define('MYAAC_VERSION', '0.8.6-dev');
 define('DATABASE_VERSION', 32);
 define('TABLE_PREFIX', 'myaac_');
 define('START_TIME', microtime(true));