diff --git a/bin/rector.php b/bin/rector.php
index d42541061cd..07eea9a09cc 100755
--- a/bin/rector.php
+++ b/bin/rector.php
@@ -6,12 +6,10 @@
 use Rector\Bootstrap\AutoloadFileParameterResolver;
 use Rector\Bootstrap\RectorConfigsResolver;
 use Rector\ChangesReporting\Output\JsonOutputFormatter;
-use Rector\Config\RectorConfig;
 use Rector\Configuration\Option;
 use Rector\Console\Style\SymfonyStyleFactory;
 use Rector\DependencyInjection\LazyContainerFactory;
 use Rector\DependencyInjection\RectorContainerFactory;
-use Rector\NodeTypeResolver\DependencyInjection\PHPStanServicesFactory;
 use Rector\Util\Reflection\PrivatesAccessor;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Command\Command;
diff --git a/composer.json b/composer.json
index ed7fce6bd1f..268e11782ec 100644
--- a/composer.json
+++ b/composer.json
@@ -42,7 +42,7 @@
         "webmozart/assert": "^2.4"
     },
     "require-dev": {
-        "boundwize/structarmed": "^0.14",
+        "boundwize/structarmed": "^0.15",
         "nette/robot-loader": "^4.1",
         "php-parallel-lint/php-parallel-lint": "^1.4",
         "phpstan/extension-installer": "^1.4",
diff --git a/rules-tests/Renaming/Rector/Name/RenameClassRector/FixtureAutoImportNames/SomeShort.php b/rules-tests/Renaming/Rector/Name/RenameClassRector/FixtureAutoImportNames/SomeShort.php
index a9bbd6152d3..81c22f6cfc2 100644
--- a/rules-tests/Renaming/Rector/Name/RenameClassRector/FixtureAutoImportNames/SomeShort.php
+++ b/rules-tests/Renaming/Rector/Name/RenameClassRector/FixtureAutoImportNames/SomeShort.php
@@ -4,6 +4,6 @@
 
 namespace Rector\Tests\Renaming\Rector\Name\RenameClassRector\FixtureAutoImportNames;
 
-class SomeShort
+final class SomeShort
 {
 }
diff --git a/rules/Php81/Rector/Array_/ArrayToFirstClassCallableRector.php b/rules/Php81/Rector/Array_/ArrayToFirstClassCallableRector.php
index 30609679dce..6512455c472 100644
--- a/rules/Php81/Rector/Array_/ArrayToFirstClassCallableRector.php
+++ b/rules/Php81/Rector/Array_/ArrayToFirstClassCallableRector.php
@@ -31,7 +31,7 @@
  * @see RFC https://wiki.php.net/rfc/first_class_callable_syntax
  * @see \Rector\Tests\Php81\Rector\Array_\ArrayToFirstClassCallableRector\ArrayToFirstClassCallableRectorTest
  */
-class ArrayToFirstClassCallableRector extends AbstractRector implements MinPhpVersionInterface
+final class ArrayToFirstClassCallableRector extends AbstractRector implements MinPhpVersionInterface
 {
     public function __construct(
         private readonly ArrayCallableMethodMatcher $arrayCallableMethodMatcher,
diff --git a/src/PhpParser/Node/FileNode.php b/src/PhpParser/Node/FileNode.php
index c39b2d0c27b..4611c641578 100644
--- a/src/PhpParser/Node/FileNode.php
+++ b/src/PhpParser/Node/FileNode.php
@@ -22,7 +22,7 @@
 /**
  * Inspired by https://github.com/phpstan/phpstan-src/commit/ed81c3ad0b9877e6122c79b4afda9d10f3994092
  */
-class FileNode extends Stmt
+final class FileNode extends Stmt
 {
     /**
      * Imports queued to be added on the next UseAddingPostRector run; scoped to this file
diff --git a/structarmed.php b/structarmed.php
index 61913483c8d..4a668b365fc 100644
--- a/structarmed.php
+++ b/structarmed.php
@@ -5,8 +5,13 @@
 use Boundwize\StructArmed\Architecture;
 use Boundwize\StructArmed\Preset\Preset;
 use Boundwize\StructArmed\Preset\Presets\Psr4Preset;
+use Boundwize\StructArmed\Rule\Rules\Class_\MustBeFinalRule;
 
 return Architecture::define()
+    ->rule(
+        'source.must_be_final',
+        new MustBeFinalRule(layer: 'Source'),
+    )
     ->skip([
         Psr4Preset::CLASSES_MUST_MATCH_COMPOSER => [
             // the namespace different is on purpose
@@ -19,5 +24,8 @@
             // simulate under phpstan.phar
             __DIR__ . '/rules-tests/Php71/Rector/FuncCall/RemoveExtraParametersRector/Source/phpstan.phar',
         ],
+        'source.must_be_final' => [
+            '*/Source/*',
+        ],
     ])
     ->withPreset(Preset::PSR4());