diff --git a/composer.json b/composer.json
index 06333f4..29a74ff 100644
--- a/composer.json
+++ b/composer.json
@@ -18,8 +18,8 @@
         "react/promise": "^3 || ^2.7"
     },
     "require-dev": {
-        "phpstan/phpstan": "1.9.2 || 1.4.10",
-        "phpunit/phpunit": "^9.5 || ^7.5",
+        "phpstan/phpstan": "1.10.6 || 1.4.10",
+        "phpunit/phpunit": "^9.6 || ^7.5",
         "psr/container": "^2 || ^1"
     },
     "autoload": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 2c828a1..26708a1 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<!-- PHPUnit configuration file with new format for PHPUnit 9.5+ -->
+<!-- PHPUnit configuration file with new format for PHPUnit 9.6+ -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.6/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          cacheResult="false"
          colors="true"
@@ -21,7 +21,7 @@
     <php>
         <ini name="error_reporting" value="-1" />
         <!-- Evaluate assertions, requires running with "php -d zend.assertions=1 vendor/bin/phpunit" -->
-        <!-- <ini name="zend.assertions=1" value="1" /> -->
+        <!-- <ini name="zend.assertions" value="1" /> -->
         <ini name="assert.active" value="1" />
         <ini name="assert.exception" value="1" />
         <ini name="assert.bail" value="0" />
diff --git a/phpunit.xml.legacy b/phpunit.xml.legacy
index 8b1885e..5bab1e8 100644
--- a/phpunit.xml.legacy
+++ b/phpunit.xml.legacy
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<!-- PHPUnit configuration file with old PHPUnit 7 format for PHP < 7.3 -->
+<!-- PHPUnit configuration file with old format for legacy PHPUnit -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/7.5/phpunit.xsd"
          bootstrap="vendor/autoload.php"
@@ -19,7 +19,7 @@
     <php>
         <ini name="error_reporting" value="-1" />
         <!-- Evaluate assertions, requires running with "php -d zend.assertions=1 vendor/bin/phpunit" -->
-        <!-- <ini name="zend.assertions=1" value="1" /> -->
+        <!-- <ini name="zend.assertions" value="1" /> -->
         <ini name="assert.active" value="1" />
         <ini name="assert.exception" value="1" />
         <ini name="assert.bail" value="0" />