diff --git a/README.md b/README.md
index a42a4ea7b98212c161d027a93e0d97225bc27c42..25f6428be09c3cf6779787b6ff2e98cd47a5b4d4 100755
--- a/README.md
+++ b/README.md
@@ -15,7 +15,8 @@ to be able to display javascript quickly and correctly.
 
 ## Branches
  - MASTER: Current development release
- - 1.5: Productional branch for 1.5.x release
+ - 1.6: Productional branch for 1.6.x release
+ - 1.5: Productional branch for 1.5.x release (obsolete)
  - 1.4: Productional branch for 1.4.x release (obsolete)
  - 1.3: Productional branch for 1.3.x release (obsolete)
  - 1.2: Productional branch for 1.2.x release (obsolete)
@@ -26,7 +27,8 @@ to be able to display javascript quickly and correctly.
 phpIPAM has been developed and tested on the following PHP versions.\
 The use of untested PHP versions is unsupported and may result in compatibility issues.
 
-- MASTER: PHP versions 5.4 to 8.1 (8.x support work-in-progress)
+- MASTER: PHP versions 7.2 to 8.3
+- 1.6.x: PHP versions 7.2 to 8.3
 - 1.5.x: PHP versions 5.4 to 7.4
 - 1.4.x: PHP versions 5.4 to 7.4
 - 1.3.x: PHP versions 5.4 to 7.1
diff --git a/functions/checks/check_php_build.php b/functions/checks/check_php_build.php
index a3237bb5b118709c28688a388b8e925b737c557f..612f0618e5be43a49656111265d79ac7e744eb95 100755
--- a/functions/checks/check_php_build.php
+++ b/functions/checks/check_php_build.php
@@ -12,10 +12,10 @@ $requiredExt  = array("session", "sockets", "filter", "openssl", "gmp", "json",
 $requiredFns  = array("simplexml_load_string");
 
 if(!defined('PHPIPAM_PHP_MIN'))
-define('PHPIPAM_PHP_MIN', "5.4");
+define('PHPIPAM_PHP_MIN', "7.2");
 
 if(!defined('PHPIPAM_PHP_UNTESTED'))
-define('PHPIPAM_PHP_UNTESTED', "9.0");  // PHP 8.2 or greater is untested & unsupported
+define('PHPIPAM_PHP_UNTESTED', "8.4");  // PHP 8.4 or greater is untested, use at own risk and expect issues
 
 if (phpversion() >= PHPIPAM_PHP_UNTESTED) {
     $_SESSION['footer_warnings']['php_version'] = _('Unsupported PHP version ') . phpversion();