diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 705d16c..eb9c9fd 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -43,7 +43,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
+        php-versions: ['7.4', '8.0', '8.1', '8.2', '8.3']
     steps:
       - uses: actions/checkout@v3
 
diff --git a/LICENSE b/LICENSE
index 09878cf..b6633c5 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 - 2022 Fabian Meyer and contributors
+Copyright (c) 2015 - 2024 Fabian Meyer and contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index a8f79d1..7435710 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ Contributions are very welcome. [Find out how to contribute](#contributing).
 
 PHP-SVG is free of dependencies. All it needs is a PHP installation satisfying the following requirements:
 
-* PHP version 7.3 or newer. This library is tested against all versions up to (and including) PHP 8.3.
+* PHP version 7.4 or newer. This library is tested against all versions up to (and including) PHP 8.3.
 * If you wish to load SVG files, or strings containing SVG code, you need to have the
   ['simplexml' PHP extension](https://www.php.net/manual/en/book.simplexml.php).
 * If you wish to use the rasterization feature for converting SVGs to raster images (PNGs, JPEGs, ...), you need to
diff --git a/composer.json b/composer.json
index 9aaffcc..5dd96ff 100644
--- a/composer.json
+++ b/composer.json
@@ -12,12 +12,12 @@
         }
     ],
     "require": {
-        "php": ">=7.3.0"
+        "php": ">=7.4.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5.26",
+        "phpunit/phpunit": "^9.6.16",
         "meyfa/phpunit-assert-gd": "^v3.0.0",
-        "phpmd/phpmd" : "^2.13.0"
+        "phpmd/phpmd" : "^2.15.0"
     },
     "suggest": {
         "ext-gd": "Needed to rasterize images",
diff --git a/phpcs.xml b/phpcs.xml
index f709ad5..0fbc43f 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -2,7 +2,7 @@
 <ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="PHP_CodeSniffer" xsi:noNamespaceSchemaLocation="phpcs.xsd">
     <description>The coding standard for meyfa/php-svg</description>
 
-    <config name="php_version" value="70300" />
+    <config name="php_version" value="70400" />
 
     <file>autoloader.php</file>
     <file>src</file>