diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index a8d303edf..231b39da3 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -17,14 +17,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
+        php: ['7.2', '7.3', '7.4', '8.0']
         os: ['ubuntu-latest']
-        include:
-          - php: '5.6'
-            allow_failure: true
-            phplint_options: "--exclude='{(?>.*/)?test/php/.*}' --exclude=library/Icinga/Test/BaseTestCase.php"
-          - php: '7.0'
-            allow_failure: true
 
     steps:
       - name: Checkout code base
@@ -61,7 +55,7 @@ jobs:
         os: ['ubuntu-latest']
         include:
           - php: '7.2'
-            phpunit-version: 8.5.15
+            phpunit-version: 8.5
 
     services:
       mysql:
diff --git a/README.md b/README.md
index 3949a99a8..bc1fc77c0 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Icinga Web 2
 
-[![PHP Support](https://img.shields.io/badge/php-%3E%3D%205.6-777BB4?logo=PHP)](https://php.net/)
+[![PHP Support](https://img.shields.io/badge/php-%3E%3D%207.2-777BB4?logo=PHP)](https://php.net/)
 ![Build Status](https://github.com/icinga/icingaweb2/workflows/PHP%20Tests/badge.svg?branch=master)
 [![Github Tag](https://img.shields.io/github/tag/Icinga/icingaweb2.svg)](https://github.com/Icinga/icingaweb2)
 
diff --git a/doc/02-Installation.md b/doc/02-Installation.md
index d0301b723..6c80d1672 100644
--- a/doc/02-Installation.md
+++ b/doc/02-Installation.md
@@ -38,8 +38,7 @@ thoroughly.
 
 * [Icinga 2](https://icinga.com/products/icinga-2/) with the IDO database backend (MySQL or PostgreSQL)
 * A web server, e.g. Apache or Nginx
-* PHP version >= 7.3
-  * Older versions (5.6+) are only supported up until Icinga Web v2.11
+* PHP version >= 7.2
 
 ### Optional Requirements
 * For exports to PDF also the following PHP modules are required: mbstring, GD, Imagick
@@ -388,8 +387,7 @@ You will need to install certain dependencies depending on your setup:
 
 * [Icinga 2](https://icinga.com/products/icinga-2/) with the IDO database backend (MySQL or PostgreSQL)
 * A web server, e.g. Apache or Nginx
-* PHP version >= 7.3
-  * Older versions (5.6+) are only supported up until version 2.11
+* PHP version >= 7.2
 * [Icinga PHP Library (ipl)](https://github.com/Icinga/icinga-php-library) (>= 0.8)
 * [Icinga PHP Thirdparty](https://github.com/Icinga/icinga-php-thirdparty) (>= 0.10)
 * The following PHP modules must be installed: cURL, json, gettext, fileinfo, intl, dom, OpenSSL and xml
diff --git a/modules/setup/library/Setup/WebWizard.php b/modules/setup/library/Setup/WebWizard.php
index 2b6321d4a..0b49381ed 100644
--- a/modules/setup/library/Setup/WebWizard.php
+++ b/modules/setup/library/Setup/WebWizard.php
@@ -566,29 +566,14 @@ class WebWizard extends Wizard implements SetupWizard
     public function getRequirements($skipModules = false)
     {
         $set = new RequirementSet();
-        $phpVersion = Platform::getPhpVersion();
 
-        if (version_compare($phpVersion, '5.6', '>=')
-            && version_compare($phpVersion, '7.3', '<')
-        ) {
-            $set->add(new PhpVersionRequirement(array(
-                'optional'      => true,
-                'condition'     => array('>=', '7.3'),
-                'description'   => mt(
-                    'setup',
-                    'Running Icinga Web 2 requires PHP version 7.3.'
-                    . ' Older versions are only supported up until version 2.11.'
-                )
-            )));
-        } else {
-            $set->add(new PhpVersionRequirement(array(
-                'condition'     => array('>=', '7.3'),
-                'description'   => mt(
-                    'setup',
-                    'Running Icinga Web 2 requires PHP version 7.3.'
-                )
-            )));
-        }
+        $set->add(new PhpVersionRequirement(array(
+            'condition'     => array('>=', '7.2'),
+            'description'   => sprintf(mt(
+                'setup',
+                'Running Icinga Web 2 requires PHP version %s.'
+            ), '7.2')
+        )));
 
         $set->add(new OSRequirement(array(
             'optional'      => true,