diff --git a/README.md b/README.md
index 1f018d9..556a641 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 * Contributors:      stklcode
 * Requires at least: 5.1
 * Tested up to:      6.9
-* Requires PHP:      7.2
+* Requires PHP:      7.4
 * Stable tag:        1.7.2
 * License:           GPLv2 or later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
@@ -55,7 +55,7 @@ The plugin is capable of handling multisite installations.
 * Goto _Settings_ -> _Statify Filter_ to configure the plugin
 
 ### Requirements ###
-* PHP 7.2 or above
+* PHP 7.4 or above
 * WordPress 5.1 or above
 * _Statify_ plugin installed and activated (1.5 or above)
 
diff --git a/composer.json b/composer.json
index a7f02aa..200e280 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
   ],
   "type": "wordpress-plugin",
   "require": {
-    "php": ">=7.2",
+    "php": ">=7.4",
     "composer/installers": "~v2.3"
   },
   "require-dev": {
diff --git a/inc/class-statifyblacklist.php b/inc/class-statifyblacklist.php
index 9b13d5d..3e07ea3 100644
--- a/inc/class-statifyblacklist.php
+++ b/inc/class-statifyblacklist.php
@@ -326,7 +326,7 @@ private static function get_referer(): string {
 	private static function get_referer_domain(): string {
 		$referer = wp_parse_url( self::get_referer() );
 
-		return strtolower( ( isset( $referer['host'] ) ? $referer['host'] : '' ) );
+		return strtolower( $referer['host'] ?? '' );
 	}
 
 	/**
diff --git a/phpcs.xml b/phpcs.xml
index 22dbc28..a146c36 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -26,6 +26,6 @@
 	</rule>
 
 	<!-- PHP compatibility level -->
-	<config name="testVersion" value="7.2-"/>
+	<config name="testVersion" value="7.4-"/>
 	<rule ref="PHPCompatibilityWP"/>
 </ruleset>
diff --git a/statify-blacklist.php b/statify-blacklist.php
index 5d7505b..98bdc2d 100644
--- a/statify-blacklist.php
+++ b/statify-blacklist.php
@@ -12,7 +12,7 @@
  * Description:       Extension for the Statify plugin to add customizable filters. (formerly "Statify Blacklist")
  * Version:           1.7.2
  * Requires at least: 5.1
- * Requires PHP:      7.2
+ * Requires PHP:      7.4
  * Requires Plugins:  statify
  * Author:            Stefan Kalscheuer (@stklcode)
  * Author URI:        https://www.stklcode.de