diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0cf0e238c..5dd7d837d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
         strategy:
             matrix:
                 os: [ubuntu-latest, windows-latest]
-                php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+                php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
 
             fail-fast: false
 
diff --git a/composer.json b/composer.json
index ec4efb0e4..7e881052c 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
 		}
 	],
 	"require": {
-		"php": ">=7.2 <8.3"
+		"php": ">=7.2 <8.4"
 	},
 	"require-dev": {
 		"nette/tester": "~2.0",
diff --git a/readme.md b/readme.md
index 430cc7359..5317b8e65 100644
--- a/readme.md
+++ b/readme.md
@@ -39,7 +39,7 @@ The recommended way to install is via Composer:
 composer require nette/utils
 ```
 
-- Nette Utils 3.2 is compatible with PHP 7.2 to 8.2
+- Nette Utils 3.2 is compatible with PHP 7.2 to 8.3
 - Nette Utils 3.1 is compatible with PHP 7.1 to 8.0
 - Nette Utils 3.0 is compatible with PHP 7.1 to 8.0
 - Nette Utils 2.5 is compatible with PHP 5.6 to 8.0
diff --git a/src/Utils/Reflection.php b/src/Utils/Reflection.php
index 275775830..1ee207a4c 100644
--- a/src/Utils/Reflection.php
+++ b/src/Utils/Reflection.php
@@ -316,7 +316,8 @@ private static function parseUseStatements(string $code, ?string $forClass = nul
 			$tokens = [];
 		}
 
-		$namespace = $class = $classLevel = $level = null;
+		$namespace = $class = null;
+		$classLevel = $level = 0;
 		$res = $uses = [];
 
 		$nameTokens = PHP_VERSION_ID < 80000
@@ -387,7 +388,7 @@ private static function parseUseStatements(string $code, ?string $forClass = nul
 
 				case '}':
 					if ($level === $classLevel) {
-						$class = $classLevel = null;
+						$class = $classLevel = 0;
 					}
 
 					$level--;