diff --git a/install/dist/conf/centos70.conf.php b/install/dist/conf/centos70.conf.php
index 84b90b732a25209fbead179a09aed4deba76b4a5..ec59c754cb3c93ead89f61738982bd9f4ba5756f 100644
--- a/install/dist/conf/centos70.conf.php
+++ b/install/dist/conf/centos70.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "5.4";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/centos72.conf.php b/install/dist/conf/centos72.conf.php
index 9f2c84140c47e168ff69b37501b90cd871cb0686..a00b9b53e023de33e1bed3d0bb01027171a3b772 100644
--- a/install/dist/conf/centos72.conf.php
+++ b/install/dist/conf/centos72.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "5.4";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/centos80.conf.php b/install/dist/conf/centos80.conf.php
index b69e578d40e089368bf17d0c33b0086c3a1fd314..9e702b0b7442ad7526a63864a5a75892b410e3c4 100644
--- a/install/dist/conf/centos80.conf.php
+++ b/install/dist/conf/centos80.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "7.2";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/debian100.conf.php b/install/dist/conf/debian100.conf.php
index c98a2677ec2f1f89f4294a4d5118df77c43bcfe7..b23bbbf32c3a64a8fc949e4a347ee5c8555b1b7d 100644
--- a/install/dist/conf/debian100.conf.php
+++ b/install/dist/conf/debian100.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "7.3";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/debian110.conf.php b/install/dist/conf/debian110.conf.php
index 8b81c8680c0b015ece0ae42ef96647aa4591c1dc..a1754722e56f773f20dbd3cb61391bc74e7be659 100644
--- a/install/dist/conf/debian110.conf.php
+++ b/install/dist/conf/debian110.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "7.4";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/debian90.conf.php b/install/dist/conf/debian90.conf.php
index 906fda1c0e09eecbb0f1a223a9aea7a13b07433a..64e22fea285a6a014027c531cdc9ca9b152d97ee 100644
--- a/install/dist/conf/debian90.conf.php
+++ b/install/dist/conf/debian90.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "7.0";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/debiantesting.conf.php b/install/dist/conf/debiantesting.conf.php
index 03f2612377330d50b7f5614693008d8982b5fcd0..e2fa04f8ab9bf5b6b63ce234d941b65af3e32c91 100644
--- a/install/dist/conf/debiantesting.conf.php
+++ b/install/dist/conf/debiantesting.conf.php
@@ -32,7 +32,7 @@ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 //* Main
 $conf['language'] = 'en';
-$conf['distname'] = 'debian110';
+$conf['distname'] = 'debian120';
 $conf['hostname'] = 'server1.domain.tld'; // Full hostname
 $conf['ispconfig_install_dir'] = '/usr/local/ispconfig';
 $conf['ispconfig_config_dir'] = '/usr/local/ispconfig';
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "8.1";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/ubuntu1604.conf.php b/install/dist/conf/ubuntu1604.conf.php
index b7c68c7bbf9c78eded96adfda2977ed1d53cd6fe..3758eeff30619b46dfdaef8eb8ae1e152a695238 100644
--- a/install/dist/conf/ubuntu1604.conf.php
+++ b/install/dist/conf/ubuntu1604.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "7.0";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/ubuntu1804.conf.php b/install/dist/conf/ubuntu1804.conf.php
index 319930698b81d4c5708b530afc7bfac462c312f8..6dc51a13c77a776389002b1ed4485372b462eb31 100644
--- a/install/dist/conf/ubuntu1804.conf.php
+++ b/install/dist/conf/ubuntu1804.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "7.2";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/dist/conf/ubuntu2004.conf.php b/install/dist/conf/ubuntu2004.conf.php
index 546e2f57d7df7c472d9c0c2862d8a45fcbdb48f9..2cde7e3200f0366aabe5fffd1d0f453dac7a8e94 100644
--- a/install/dist/conf/ubuntu2004.conf.php
+++ b/install/dist/conf/ubuntu2004.conf.php
@@ -43,6 +43,7 @@ $conf['init_scripts'] = '/etc/init.d';
 $conf['runlevel'] = '/etc';
 $conf['shells'] = '/etc/shells';
 $conf['pam'] = '/etc/pam.d';
+$conf['default_php'] = "7.4";
 
 //* Services provided by this server, this selection will be overridden by the expert mode
 $conf['services']['mail'] = true;
diff --git a/install/lib/installer_base.lib.php b/install/lib/installer_base.lib.php
index 05312093120cce474839bce6775a40393bb8cc05..6cc4de996ab17a97bcbc827c372b87110a6a06ef 100644
--- a/install/lib/installer_base.lib.php
+++ b/install/lib/installer_base.lib.php
@@ -248,8 +248,11 @@ class installer_base {
 	public function check_prerequisites() {
 		$msg = '';
 
-		if(version_compare(phpversion(), '5.4', '<')) $msg .= "PHP Version 5.4 or newer is required. The currently used PHP version is ".phpversion().".\n";
-		if(version_compare(phpversion(), '8.2', '>=')) $msg .= "PHP Version 8.2+ is not supported yet. Change PHP version back to the default version of the OS. The currently used PHP version is ".phpversion().".\n";
+		if ($conf['default_php'] != '') {
+			if(version_compare(phpversion('tidy'), $conf['default_php'], '==')) $msg .= "Your PHP version is not the OS default. Change the PHP version back to the default version of the OS. The currently used PHP version is " . phpversion() . "The default version for your OS is PHP " . $conf['default_php'] . ".\n";
+		}
+		if(version_compare(phpversion(), '5.4', '<')) $msg .= "PHP Version 5.4 or newer is required. The currently used PHP version is " . phpversion() . ".\n";
+		//if(version_compare(phpversion(), '8.2', '>=')) $msg .= "PHP Version 8.2+ is not supported yet. Change the PHP version back to the default version of the OS. The currently used PHP version is " . phpversion() . ".\n";
 		if(!function_exists('curl_init')) $msg .= "PHP Curl Module is missing.\n";
 		if(!function_exists('mysqli_connect')) $msg .= "PHP MySQLi Module is nmissing.\n";
 		if(!function_exists('mb_detect_encoding')) $msg .= "PHP Multibyte Module (MB) is missing.\n";