diff --git a/composer.json b/composer.json
index 1a4398f..4282077 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "csfix": "vendor/bin/phpcbf --standard=Solido lib/"
   },
   "require-dev": {
-    "doctrine/annotations": "~1.2",
+    "doctrine/annotations": "^1.2 | ^2.0",
     "doctrine/cache": "^1.4",
     "kcs/class-finder": "^0.2 | ^0.3 | ^1.0@dev",
     "phpspec/prophecy-phpunit": "^2.0",
diff --git a/lib/ClassMetadata.php b/lib/ClassMetadata.php
index 8c1e970..d309ea5 100644
--- a/lib/ClassMetadata.php
+++ b/lib/ClassMetadata.php
@@ -96,7 +96,7 @@ public function getAttributeMetadata(string $name): MetadataInterface
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     public function getAttributesMetadata(): array
     {
diff --git a/lib/Exception/InvalidArgumentException.php b/lib/Exception/InvalidArgumentException.php
index 77c295c..622c354 100644
--- a/lib/Exception/InvalidArgumentException.php
+++ b/lib/Exception/InvalidArgumentException.php
@@ -21,7 +21,7 @@ class InvalidArgumentException extends \InvalidArgumentException
     public const INVALID_PROCESSOR_INTERFACE_CLASS = 5;
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     final public function __construct(string $message = '', int $code = 0, Throwable|null $previous = null)
     {
diff --git a/lib/Factory/AbstractMetadataFactory.php b/lib/Factory/AbstractMetadataFactory.php
index 5b2ffa5..40041c1 100644
--- a/lib/Factory/AbstractMetadataFactory.php
+++ b/lib/Factory/AbstractMetadataFactory.php
@@ -46,7 +46,7 @@ public function setMetadataFor(string $className, ClassMetadataInterface $class)
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     public function getMetadataFor($value): ClassMetadataInterface
     {
@@ -96,7 +96,7 @@ public function getMetadataFor($value): ClassMetadataInterface
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     public function hasMetadataFor($value): bool
     {
diff --git a/lib/Loader/AnnotationProcessorLoader.php b/lib/Loader/AnnotationProcessorLoader.php
index ba6b3b8..9a5def1 100644
--- a/lib/Loader/AnnotationProcessorLoader.php
+++ b/lib/Loader/AnnotationProcessorLoader.php
@@ -22,7 +22,7 @@ public function setReader(Reader $reader): void
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     protected function getClassDescriptors(ReflectionClass $reflectionClass): array
     {
@@ -30,7 +30,7 @@ protected function getClassDescriptors(ReflectionClass $reflectionClass): array
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     protected function getMethodDescriptors(ReflectionMethod $reflectionMethod): array
     {
@@ -38,7 +38,7 @@ protected function getMethodDescriptors(ReflectionMethod $reflectionMethod): arr
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     protected function getPropertyDescriptors(ReflectionProperty $reflectionProperty): array
     {
diff --git a/lib/Loader/AttributesProcessorLoader.php b/lib/Loader/AttributesProcessorLoader.php
index e990655..460618f 100644
--- a/lib/Loader/AttributesProcessorLoader.php
+++ b/lib/Loader/AttributesProcessorLoader.php
@@ -27,7 +27,7 @@ public function __construct(ProcessorFactoryInterface $processorFactory)
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     protected function getClassDescriptors(ReflectionClass $reflectionClass): array
     {
@@ -35,7 +35,7 @@ protected function getClassDescriptors(ReflectionClass $reflectionClass): array
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     protected function getMethodDescriptors(ReflectionMethod $reflectionMethod): array
     {
@@ -43,7 +43,7 @@ protected function getMethodDescriptors(ReflectionMethod $reflectionMethod): arr
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     protected function getPropertyDescriptors(ReflectionProperty $reflectionProperty): array
     {
diff --git a/lib/Loader/FilesLoader.php b/lib/Loader/FilesLoader.php
index b117734..402a276 100644
--- a/lib/Loader/FilesLoader.php
+++ b/lib/Loader/FilesLoader.php
@@ -9,7 +9,7 @@
 class FilesLoader extends ChainLoader
 {
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      *
      * @phpstan-param class-string<LoaderInterface>|null $loaderClass
      */
diff --git a/lib/Loader/Locator/FinderFileLocator.php b/lib/Loader/Locator/FinderFileLocator.php
index 04cf7a0..3231d5e 100644
--- a/lib/Loader/Locator/FinderFileLocator.php
+++ b/lib/Loader/Locator/FinderFileLocator.php
@@ -14,7 +14,7 @@
 class FinderFileLocator implements FileLocatorInterface
 {
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     public function locate(string $basePath, string $extension): array
     {
diff --git a/lib/Loader/Locator/IteratorFileLocator.php b/lib/Loader/Locator/IteratorFileLocator.php
index b86c556..bdcd29d 100644
--- a/lib/Loader/Locator/IteratorFileLocator.php
+++ b/lib/Loader/Locator/IteratorFileLocator.php
@@ -18,7 +18,7 @@
 class IteratorFileLocator implements FileLocatorInterface
 {
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     public function locate(string $basePath, string $extension): array
     {
diff --git a/lib/MetadataPropertiesTrait.php b/lib/MetadataPropertiesTrait.php
index 314245e..ed3f43b 100644
--- a/lib/MetadataPropertiesTrait.php
+++ b/lib/MetadataPropertiesTrait.php
@@ -12,7 +12,7 @@
 trait MetadataPropertiesTrait
 {
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     public function __sleep(): array
     {
diff --git a/lib/NullMetadata.php b/lib/NullMetadata.php
index 38a0b6d..28b63e8 100644
--- a/lib/NullMetadata.php
+++ b/lib/NullMetadata.php
@@ -23,7 +23,7 @@ public function getName(): string
     }
 
     /**
-     * {@inheritdoc}
+     * {@inheritDoc}
      */
     public function __sleep(): array
     {
diff --git a/tests/Loader/Processor/ProcessorFactoryTest.php b/tests/Loader/Processor/ProcessorFactoryTest.php
index 9ae5048..089bd86 100644
--- a/tests/Loader/Processor/ProcessorFactoryTest.php
+++ b/tests/Loader/Processor/ProcessorFactoryTest.php
@@ -15,7 +15,11 @@
 use Kcs\Metadata\Tests\Fixtures\AnnotationProcessorLoader\Processor\ClassAttribProcessor;
 use PHPUnit\Framework\TestCase;
 
-AnnotationRegistry::registerLoader('class_exists');
+use function method_exists;
+
+if (method_exists(AnnotationRegistry::class, 'registerLoader')) {
+    AnnotationRegistry::registerLoader('class_exists');
+}
 
 class FakeProcessor implements ProcessorInterface
 {