diff --git a/src/Cache/ChainCache.php b/src/Cache/ChainCache.php
index 18c66f35f..c94afdb43 100644
--- a/src/Cache/ChainCache.php
+++ b/src/Cache/ChainCache.php
@@ -21,14 +21,12 @@ namespace Twig\Cache;
  */
 final class ChainCache implements CacheInterface
 {
-    private $caches;
-
     /**
      * @param iterable<CacheInterface> $caches The ordered list of caches used to store and fetch cached items
      */
-    public function __construct(iterable $caches)
-    {
-        $this->caches = $caches;
+    public function __construct(
+        private iterable $caches,
+    ) {
     }
 
     public function generateKey(string $name, string $className): string
diff --git a/src/Compiler.php b/src/Compiler.php
index 1e7ed04c6..1a43aa7f6 100644
--- a/src/Compiler.php
+++ b/src/Compiler.php
@@ -22,7 +22,6 @@ class Compiler
     private $lastLine;
     private $source;
     private $indentation;
-    private $env;
     private $debugInfo = [];
     private $sourceOffset;
     private $sourceLine;
@@ -30,9 +29,9 @@ class Compiler
     private $didUseEcho = false;
     private $didUseEchoStack = [];
 
-    public function __construct(Environment $env)
-    {
-        $this->env = $env;
+    public function __construct(
+        private Environment $env,
+    ) {
     }
 
     public function getEnvironment(): Environment
diff --git a/src/Environment.php b/src/Environment.php
index 237d59803..bb4bc09ae 100644
--- a/src/Environment.php
+++ b/src/Environment.php
@@ -107,7 +107,7 @@ class Environment
      *               false (default): allows templates to use a mix of "yield" and "echo" calls to allow for a progressive migration
      *               Switch to "true" when possible as this will be the only supported mode in Twig 4.0
      */
-    public function __construct(LoaderInterface $loader, $options = [])
+    public function __construct(LoaderInterface $loader, array $options = [])
     {
         $this->setLoader($loader);
 
diff --git a/src/ExpressionParser.php b/src/ExpressionParser.php
index 28b556ccc..bfc1a1d04 100644
--- a/src/ExpressionParser.php
+++ b/src/ExpressionParser.php
@@ -47,18 +47,16 @@ class ExpressionParser
     public const OPERATOR_LEFT = 1;
     public const OPERATOR_RIGHT = 2;
 
-    private $parser;
-    private $env;
     /** @var array<string, array{precedence: int, class: class-string<AbstractUnary>}> */
     private $unaryOperators;
     /** @var array<string, array{precedence: int, class: class-string<AbstractBinary>, associativity: self::OPERATOR_*}> */
     private $binaryOperators;
     private $readyNodes = [];
 
-    public function __construct(Parser $parser, Environment $env)
-    {
-        $this->parser = $parser;
-        $this->env = $env;
+    public function __construct(
+        private Parser $parser,
+        private Environment $env,
+    ) {
         $this->unaryOperators = $env->getUnaryOperators();
         $this->binaryOperators = $env->getBinaryOperators();
     }
diff --git a/src/Extension/OptimizerExtension.php b/src/Extension/OptimizerExtension.php
index 965bfdb04..d3fe46a67 100644
--- a/src/Extension/OptimizerExtension.php
+++ b/src/Extension/OptimizerExtension.php
@@ -15,11 +15,9 @@ use Twig\NodeVisitor\OptimizerNodeVisitor;
 
 final class OptimizerExtension extends AbstractExtension
 {
-    private $optimizers;
-
-    public function __construct(int $optimizers = -1)
-    {
-        $this->optimizers = $optimizers;
+    public function __construct(
+        private int $optimizers = -1,
+    ) {
     }
 
     public function getNodeVisitors(): array
diff --git a/src/Extension/YieldNotReadyExtension.php b/src/Extension/YieldNotReadyExtension.php
index 2503c8d81..49dfb8085 100644
--- a/src/Extension/YieldNotReadyExtension.php
+++ b/src/Extension/YieldNotReadyExtension.php
@@ -18,11 +18,9 @@ use Twig\NodeVisitor\YieldNotReadyNodeVisitor;
  */
 final class YieldNotReadyExtension extends AbstractExtension
 {
-    private $useYield;
-
-    public function __construct(bool $useYield)
-    {
-        $this->useYield = $useYield;
+    public function __construct(
+        private bool $useYield,
+    ) {
     }
 
     public function getNodeVisitors(): array
diff --git a/src/Loader/ArrayLoader.php b/src/Loader/ArrayLoader.php
index ce613c9cc..2bb54b7a8 100644
--- a/src/Loader/ArrayLoader.php
+++ b/src/Loader/ArrayLoader.php
@@ -28,14 +28,12 @@ use Twig\Source;
  */
 final class ArrayLoader implements LoaderInterface
 {
-    private $templates = [];
-
     /**
      * @param array $templates An array of templates (keys are the names, and values are the source code)
      */
-    public function __construct(array $templates = [])
-    {
-        $this->templates = $templates;
+    public function __construct(
+        private array $templates = [],
+    ) {
     }
 
     public function setTemplate(string $name, string $template): void
diff --git a/src/Loader/ChainLoader.php b/src/Loader/ChainLoader.php
index 90f798db3..6e4f9511c 100644
--- a/src/Loader/ChainLoader.php
+++ b/src/Loader/ChainLoader.php
@@ -21,11 +21,6 @@ use Twig\Source;
  */
 final class ChainLoader implements LoaderInterface
 {
-    /**
-     * @var \Traversable<LoaderInterface>|LoaderInterface[]
-     */
-    private $loaders;
-
     /**
      * @var array<string, bool>
      */
@@ -34,9 +29,9 @@ final class ChainLoader implements LoaderInterface
     /**
      * @param iterable<LoaderInterface> $loaders
      */
-    public function __construct(iterable $loaders = [])
-    {
-        $this->loaders = $loaders;
+    public function __construct(
+        private iterable $loaders = [],
+    ) {
     }
 
     public function addLoader(LoaderInterface $loader): void
diff --git a/src/Markup.php b/src/Markup.php
index 1788acc4f..3020c60c4 100644
--- a/src/Markup.php
+++ b/src/Markup.php
@@ -19,7 +19,7 @@ namespace Twig;
 class Markup implements \Countable, \JsonSerializable
 {
     private $content;
-    private $charset;
+    private ?string $charset;
 
     public function __construct($content, $charset)
     {
diff --git a/src/NodeVisitor/OptimizerNodeVisitor.php b/src/NodeVisitor/OptimizerNodeVisitor.php
index 0d2dc02d5..a943f45c3 100644
--- a/src/NodeVisitor/OptimizerNodeVisitor.php
+++ b/src/NodeVisitor/OptimizerNodeVisitor.php
@@ -47,13 +47,13 @@ final class OptimizerNodeVisitor implements NodeVisitorInterface
 
     private $loops = [];
     private $loopsTargets = [];
-    private $optimizers;
 
     /**
      * @param int $optimizers The optimizer mode
      */
-    public function __construct(int $optimizers = -1)
-    {
+    public function __construct(
+        private int $optimizers = -1,
+    ) {
         if ($optimizers > (self::OPTIMIZE_FOR | self::OPTIMIZE_RAW_FILTER | self::OPTIMIZE_TEXT_NODES)) {
             throw new \InvalidArgumentException(\sprintf('Optimizer mode "%s" is not valid.', $optimizers));
         }
@@ -65,8 +65,6 @@ final class OptimizerNodeVisitor implements NodeVisitorInterface
         if (-1 !== $optimizers && self::OPTIMIZE_TEXT_NODES === (self::OPTIMIZE_TEXT_NODES & $optimizers)) {
             trigger_deprecation('twig/twig', '3.12', 'The "Twig\NodeVisitor\OptimizerNodeVisitor::OPTIMIZE_TEXT_NODES" option is deprecated and does nothing.');
         }
-
-        $this->optimizers = $optimizers;
     }
 
     public function enterNode(Node $node, Environment $env): Node
diff --git a/src/NodeVisitor/YieldNotReadyNodeVisitor.php b/src/NodeVisitor/YieldNotReadyNodeVisitor.php
index 6470bdabc..4b190b414 100644
--- a/src/NodeVisitor/YieldNotReadyNodeVisitor.php
+++ b/src/NodeVisitor/YieldNotReadyNodeVisitor.php
@@ -21,12 +21,11 @@ use Twig\Node\Node;
  */
 final class YieldNotReadyNodeVisitor implements NodeVisitorInterface
 {
-    private $useYield;
     private $yieldReadyNodes = [];
 
-    public function __construct(bool $useYield)
-    {
-        $this->useYield = $useYield;
+    public function __construct(
+        private bool $useYield,
+    ) {
     }
 
     public function enterNode(Node $node, Environment $env): Node
diff --git a/src/Parser.php b/src/Parser.php
index 28cc8a0e1..cd8da2b8e 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -40,15 +40,14 @@ class Parser
     private $blocks;
     private $blockStack;
     private $macros;
-    private $env;
     private $importedSymbols;
     private $traits;
     private $embeddedTemplates = [];
     private $varNameSalt = 0;
 
-    public function __construct(Environment $env)
-    {
-        $this->env = $env;
+    public function __construct(
+        private Environment $env,
+    ) {
     }
 
     public function getVarName(): string
diff --git a/src/Profiler/NodeVisitor/ProfilerNodeVisitor.php b/src/Profiler/NodeVisitor/ProfilerNodeVisitor.php
index 4d2a58105..1458bc5fc 100644
--- a/src/Profiler/NodeVisitor/ProfilerNodeVisitor.php
+++ b/src/Profiler/NodeVisitor/ProfilerNodeVisitor.php
@@ -27,12 +27,11 @@ use Twig\Profiler\Profile;
  */
 final class ProfilerNodeVisitor implements NodeVisitorInterface
 {
-    private $extensionName;
     private $varName;
 
-    public function __construct(string $extensionName)
-    {
-        $this->extensionName = $extensionName;
+    public function __construct(
+        private string $extensionName,
+    ) {
         $this->varName = \sprintf('__internal_%s', hash(\PHP_VERSION_ID < 80100 ? 'sha256' : 'xxh128', $extensionName));
     }
 
diff --git a/src/Profiler/Profile.php b/src/Profiler/Profile.php
index 72506b7c8..2928e1646 100644
--- a/src/Profiler/Profile.php
+++ b/src/Profiler/Profile.php
@@ -20,18 +20,15 @@ final class Profile implements \IteratorAggregate, \Serializable
     public const BLOCK = 'block';
     public const TEMPLATE = 'template';
     public const MACRO = 'macro';
-
-    private $template;
-    private $name;
-    private $type;
     private $starts = [];
     private $ends = [];
     private $profiles = [];
 
-    public function __construct(string $template = 'main', string $type = self::ROOT, string $name = 'main')
-    {
-        $this->template = $template;
-        $this->type = $type;
+    public function __construct(
+        private string $template = 'main',
+        private string $type = self::ROOT,
+        private string $name = 'main',
+    ) {
         $this->name = str_starts_with($name, '__internal_') ? 'INTERNAL' : $name;
         $this->enter();
     }
diff --git a/src/Runtime/EscaperRuntime.php b/src/Runtime/EscaperRuntime.php
index b1dac9640..e4aee629a 100644
--- a/src/Runtime/EscaperRuntime.php
+++ b/src/Runtime/EscaperRuntime.php
@@ -26,11 +26,9 @@ final class EscaperRuntime implements RuntimeExtensionInterface
     /** @internal */
     public $safeLookup = [];
 
-    private $charset;
-
-    public function __construct($charset = 'UTF-8')
-    {
-        $this->charset = $charset;
+    public function __construct(
+        private $charset = 'UTF-8',
+    ) {
     }
 
     /**
diff --git a/src/RuntimeLoader/ContainerRuntimeLoader.php b/src/RuntimeLoader/ContainerRuntimeLoader.php
index b360d7bea..05106680c 100644
--- a/src/RuntimeLoader/ContainerRuntimeLoader.php
+++ b/src/RuntimeLoader/ContainerRuntimeLoader.php
@@ -23,11 +23,9 @@ use Psr\Container\ContainerInterface;
  */
 class ContainerRuntimeLoader implements RuntimeLoaderInterface
 {
-    private $container;
-
-    public function __construct(ContainerInterface $container)
-    {
-        $this->container = $container;
+    public function __construct(
+        private ContainerInterface $container,
+    ) {
     }
 
     public function load(string $class)
diff --git a/src/RuntimeLoader/FactoryRuntimeLoader.php b/src/RuntimeLoader/FactoryRuntimeLoader.php
index 130648392..5d4e70b92 100644
--- a/src/RuntimeLoader/FactoryRuntimeLoader.php
+++ b/src/RuntimeLoader/FactoryRuntimeLoader.php
@@ -18,14 +18,12 @@ namespace Twig\RuntimeLoader;
  */
 class FactoryRuntimeLoader implements RuntimeLoaderInterface
 {
-    private $map;
-
     /**
      * @param array $map An array where keys are class names and values factory callables
      */
-    public function __construct(array $map = [])
-    {
-        $this->map = $map;
+    public function __construct(
+        private array $map = [],
+    ) {
     }
 
     public function load(string $class)
diff --git a/src/Source.php b/src/Source.php
index 3cb02403c..0f626b62d 100644
--- a/src/Source.php
+++ b/src/Source.php
@@ -18,20 +18,16 @@ namespace Twig;
  */
 final class Source
 {
-    private $code;
-    private $name;
-    private $path;
-
     /**
      * @param string $code The template source code
      * @param string $name The template logical name
      * @param string $path The filesystem path of the template if any
      */
-    public function __construct(string $code, string $name, string $path = '')
-    {
-        $this->code = $code;
-        $this->name = $name;
-        $this->path = $path;
+    public function __construct(
+        private string $code,
+        private string $name,
+        private string $path = '',
+    ) {
     }
 
     public function getCode(): string
diff --git a/src/Template.php b/src/Template.php
index d3c0c229d..498c35a6d 100644
--- a/src/Template.php
+++ b/src/Template.php
@@ -35,7 +35,6 @@ abstract class Template
 
     protected $parent;
     protected $parents = [];
-    protected $env;
     protected $blocks = [];
     protected $traits = [];
     protected $extensions = [];
@@ -43,9 +42,9 @@ abstract class Template
 
     private $useYield;
 
-    public function __construct(Environment $env)
-    {
-        $this->env = $env;
+    public function __construct(
+        protected Environment $env,
+    ) {
         $this->useYield = $env->useYield();
         $this->extensions = $env->getExtensions();
     }
diff --git a/src/TemplateWrapper.php b/src/TemplateWrapper.php
index fcfb070c7..c31f50161 100644
--- a/src/TemplateWrapper.php
+++ b/src/TemplateWrapper.php
@@ -18,19 +18,16 @@ namespace Twig;
  */
 final class TemplateWrapper
 {
-    private $env;
-    private $template;
-
     /**
      * This method is for internal use only and should never be called
      * directly (use Twig\Environment::load() instead).
      *
      * @internal
      */
-    public function __construct(Environment $env, Template $template)
-    {
-        $this->env = $env;
-        $this->template = $template;
+    public function __construct(
+        private Environment $env,
+        private Template $template,
+    ) {
     }
 
     public function render(array $context = []): string
diff --git a/src/Token.php b/src/Token.php
index 5be39bdc7..237634ad1 100644
--- a/src/Token.php
+++ b/src/Token.php
@@ -17,10 +17,6 @@ namespace Twig;
  */
 final class Token
 {
-    private $value;
-    private $type;
-    private $lineno;
-
     public const EOF_TYPE = -1;
     public const TEXT_TYPE = 0;
     public const BLOCK_START_TYPE = 1;
@@ -37,11 +33,11 @@ final class Token
     public const ARROW_TYPE = 12;
     public const SPREAD_TYPE = 13;
 
-    public function __construct(int $type, $value, int $lineno)
-    {
-        $this->type = $type;
-        $this->value = $value;
-        $this->lineno = $lineno;
+    public function __construct(
+        private int $type,
+        private $value,
+        private int $lineno,
+    ) {
     }
 
     public function __toString()
diff --git a/src/TokenStream.php b/src/TokenStream.php
index 32357f931..c91701bfe 100644
--- a/src/TokenStream.php
+++ b/src/TokenStream.php
@@ -21,13 +21,12 @@ use Twig\Error\SyntaxError;
  */
 final class TokenStream
 {
-    private $tokens;
     private $current = 0;
-    private $source;
 
-    public function __construct(array $tokens, ?Source $source = null)
-    {
-        $this->tokens = $tokens;
+    public function __construct(
+        private array $tokens,
+        private ?Source $source = null,
+    ) {
         $this->source = $source ?: new Source('', '');
     }
 
diff --git a/src/Util/DeprecationCollector.php b/src/Util/DeprecationCollector.php
index ad5310617..0ea26ed4b 100644
--- a/src/Util/DeprecationCollector.php
+++ b/src/Util/DeprecationCollector.php
@@ -20,11 +20,9 @@ use Twig\Source;
  */
 final class DeprecationCollector
 {
-    private $twig;
-
-    public function __construct(Environment $twig)
-    {
-        $this->twig = $twig;
+    public function __construct(
+        private Environment $twig,
+    ) {
     }
 
     /**