diff --git a/composer.json b/composer.json
index c46d2a0..6ff5c70 100644
--- a/composer.json
+++ b/composer.json
@@ -39,7 +39,7 @@
         "sebastian/recursion-context": "^4.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.2",
+        "phpunit/phpunit": "^9.3",
         "ext-mbstring": "*"
     },
     "autoload": {
diff --git a/phpunit.xml b/phpunit.xml
index e842220..7be976b 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.2/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          executionOrder="depends,defects"
          forceCoversAnnotation="true"
          beStrictAboutCoversAnnotation="true"
          beStrictAboutOutputDuringTests="true"
          beStrictAboutTodoAnnotatedTests="true"
+         failOnRisky="true"
+         failOnWarning="true"
          verbose="true">
     <testsuites>
         <testsuite name="default">
@@ -14,9 +16,9 @@
         </testsuite>
     </testsuites>
 
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
+    <coverage processUncoveredFiles="true">
+        <include>
             <directory suffix=".php">src</directory>
-        </whitelist>
-    </filter>
+        </include>
+    </coverage>
 </phpunit>