diff --git a/composer.json b/composer.json
index 81adca9..c182788 100644
--- a/composer.json
+++ b/composer.json
@@ -16,12 +16,12 @@
         }
     ],
     "require": {
-        "php": "^7.4 || ^8.0"
+        "php": "^8.0"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "^3.0",
+        "friendsofphp/php-cs-fixer": "^3.13",
         "phpunit/phpunit": "^9.5",
-        "spatie/phpunit-snapshot-assertions": "^4.0",
+        "spatie/phpunit-snapshot-assertions": "^4.2",
         "vimeo/psalm": "^5.0"
     },
     "autoload": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 3ecf98e..2b30133 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          backupGlobals="false"
          backupStaticAttributes="false"
@@ -9,15 +9,14 @@
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true">
-    <testsuites>
-        <testsuite name="unit">
-            <directory>tests</directory>
-        </testsuite>
-    </testsuites>
-
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">src</directory>
-        </whitelist>
-    </filter>
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">src</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="unit">
+      <directory>tests</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>