diff --git a/README.md b/README.md
index d13b200..5844f24 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@ return new class implements ConfigInterface
 };
 ```
 
-### Configuration with Twig Extension
+### Usage with Twig Extension
 If you're using Twig, register the extension and enable Twig integration:
 
 ```php
diff --git a/composer.json b/composer.json
index 9c5294c..5f1b3cd 100644
--- a/composer.json
+++ b/composer.json
@@ -17,6 +17,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^v3.93",
         "phpstan/phpstan": "^2.1",
+        "phpstan/phpstan-strict-rules": "^2.0",
         "phpunit/phpunit": "^13",
         "twig/twig": "^3"
     },
diff --git a/phpstan.neon b/phpstan.neon
index f1c72f5..22a4ef6 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,3 +1,6 @@
+includes:
+  - vendor/phpstan/phpstan-strict-rules/rules.neon
+
 parameters:
   level: 8
   tmpDir: var/phpstan
@@ -6,6 +9,11 @@ parameters:
     - tests
 
   reportUnmatchedIgnoredErrors: true
+  checkDynamicProperties: true
+  reportNonIntStringArrayKey: true
+  checkMissingOverrideMethodAttribute: true
+  checkStrictPrintfPlaceholderTypes: true
+
   ignoreErrors:
     - identifier: missingType.iterableValue
       path: tests/*Test.php
diff --git a/tests/Asset/AssetFactoryTest.php b/tests/Asset/AssetFactoryTest.php
index 3dc4e8f..c17fe0f 100644
--- a/tests/Asset/AssetFactoryTest.php
+++ b/tests/Asset/AssetFactoryTest.php
@@ -13,6 +13,7 @@ final class AssetFactoryTest extends TestCase
 {
     private AssetFactory $factory;
 
+    #[\Override]
     protected function setUp(): void
     {
         $this->factory = new AssetFactory();
diff --git a/tests/Integration/TwigExtensionTest.php b/tests/Integration/TwigExtensionTest.php
index b4ee604..2101928 100644
--- a/tests/Integration/TwigExtensionTest.php
+++ b/tests/Integration/TwigExtensionTest.php
@@ -17,6 +17,7 @@ final class TwigExtensionTest extends TestCase
     private TwigExtension $extension;
     private AssetMapperInterface&MockObject $assetMapper;
 
+    #[\Override]
     public function setUp(): void
     {
         $this->assetMapper = $this->createMock(AssetMapperInterface::class);
diff --git a/tests/Manifest/ManifestTest.php b/tests/Manifest/ManifestTest.php
index bd71cc9..8d1f179 100644
--- a/tests/Manifest/ManifestTest.php
+++ b/tests/Manifest/ManifestTest.php
@@ -12,6 +12,7 @@ final class ManifestTest extends TestCase
 {
     private Manifest $manifest;
 
+    #[\Override]
     protected function setUp(): void
     {
         $this->manifest = new Manifest(__DIR__ . '/../manifest.json');
diff --git a/tests/Mapper/AssetMapperFactoryTest.php b/tests/Mapper/AssetMapperFactoryTest.php
index 102b2db..e75f803 100644
--- a/tests/Mapper/AssetMapperFactoryTest.php
+++ b/tests/Mapper/AssetMapperFactoryTest.php
@@ -15,7 +15,7 @@ final class AssetMapperFactoryTest extends TestCase
     public function testCreateManifest(): void
     {
         $manifestPath = __DIR__ . '/../manifest.json';
-        $referenceParser = $this->createStub(ReferenceParserInterface::class);
+        $referenceParser = self::createStub(ReferenceParserInterface::class);
         $assetMapper = AssetMapperFactory::create($manifestPath, $referenceParser);
         self::assertInstanceOf(ManifestAssetMapper::class, $assetMapper);
     }
@@ -24,7 +24,7 @@ public function testCreateDev(): void
     {
         putenv('APP_ENV=dev');
         $manifestPath = __DIR__ . '/../manifest.json';
-        $referenceParser = $this->createStub(ReferenceParserInterface::class);
+        $referenceParser = self::createStub(ReferenceParserInterface::class);
         $assetMapper = AssetMapperFactory::create($manifestPath, $referenceParser);
         putenv('APP_ENV');
         self::assertInstanceOf(DevAssetMapper::class, $assetMapper);
diff --git a/tests/Mapper/DevAssetMapperTest.php b/tests/Mapper/DevAssetMapperTest.php
index 38698bf..36507a1 100644
--- a/tests/Mapper/DevAssetMapperTest.php
+++ b/tests/Mapper/DevAssetMapperTest.php
@@ -16,6 +16,7 @@ final class DevAssetMapperTest extends TestCase
     private MockObject&ReferenceParserInterface $referenceParser;
     private DevAssetMapper $mapper;
 
+    #[\Override]
     protected function setUp(): void
     {
         $this->referenceParser = $this->createMock(ReferenceParserInterface::class);
diff --git a/tests/Mapper/ManifestAssetMapperTest.php b/tests/Mapper/ManifestAssetMapperTest.php
index d1b3237..0491aac 100644
--- a/tests/Mapper/ManifestAssetMapperTest.php
+++ b/tests/Mapper/ManifestAssetMapperTest.php
@@ -17,6 +17,7 @@ final class ManifestAssetMapperTest extends TestCase
     private MockObject&ReferenceParserInterface $referenceParser;
     private ManifestAssetMapper $mapper;
 
+    #[\Override]
     protected function setUp(): void
     {
         $this->referenceParser = $this->createMock(ReferenceParserInterface::class);
diff --git a/tests/Mapper/TagProviderTest.php b/tests/Mapper/TagProviderTest.php
index ec405f2..6b8f990 100644
--- a/tests/Mapper/TagProviderTest.php
+++ b/tests/Mapper/TagProviderTest.php
@@ -11,6 +11,7 @@ class TagProviderTest extends TestCase
 {
     private TagProvider $provider;
 
+    #[\Override]
     protected function setUp(): void
     {
         $this->provider = new TagProvider();
diff --git a/tests/StasisViteExtensionTest.php b/tests/StasisViteExtensionTest.php
index 176144d..2df7d4e 100644
--- a/tests/StasisViteExtensionTest.php
+++ b/tests/StasisViteExtensionTest.php
@@ -29,7 +29,7 @@ public function testCreate(): void
 
     public function testCreateWithReferenceParser(): void
     {
-        $referenceParser = $this->createStub(ReferenceParserInterface::class);
+        $referenceParser = self::createStub(ReferenceParserInterface::class);
 
         $extension = StasisViteExtension::createWithReferenceParser(
             assetsSourcePath: __DIR__ . '/dist_assets',
@@ -48,7 +48,7 @@ public function testWithTwig(): void
         $twig
             ->expects($this->once())
             ->method('addExtension')
-            ->with($this->isInstanceOf(AbstractExtension::class));
+            ->with(self::isInstanceOf(AbstractExtension::class));
 
         $extension = StasisViteExtension::create(
             assetsSourcePath: __DIR__ . '/dist_assets',