diff --git a/README.md b/README.md
index db360efc..ba1e0644 100644
--- a/README.md
+++ b/README.md
@@ -12,14 +12,31 @@ This extension provides following features:
 * Provides correct return type for `Doctrine\ORM\EntityManager::find`, `getReference` and `getPartialReference` when `Foo::class` entity class name is provided as the first argument
 * Adds missing `matching` method on `Doctrine\Common\Collections\Collection`. This can be turned off by setting `parameters.doctrine.allCollectionsSelectable` to `false`.
 
-This extension does not yet support custom `repositoryClass` specified for each entity class. However, if your repositories have a common base class, you can configure it in your `phpstan.neon` and PHPStan will see additional methods you define in it:
+If your repositories have a common base class, you can configure it in your `phpstan.neon` and PHPStan will see additional methods you define in it:
 
-```
+```neon
 parameters:
 	doctrine:
 		repositoryClass: MyApp\Doctrine\BetterEntityRepository
 ```
 
+Alternatively, you can provide your object manager and all custom repositories will be loaded
+
+```neon
+parameters:
+	doctrine:
+		objectManagerLoader: tests/object-manager.php
+```
+
+For example, in a Symfony project, `object-manager.php` would look something like this:
+
+```php
+require dirname(__DIR__).'/../config/bootstrap.php';
+$kernel = new Kernel($_SERVER['APP_ENV'], (bool) $_SERVER['APP_DEBUG']);
+$kernel->boot();
+return $kernel->getContainer()->get('doctrine')->getManager();
+```
+
 ## Usage
 
 To use this extension, require it in [Composer](https://getcomposer.org/):
diff --git a/extension.neon b/extension.neon
index 4a8c5099..9c117320 100644
--- a/extension.neon
+++ b/extension.neon
@@ -1,7 +1,8 @@
 parameters:
 	doctrine:
-		repositoryClass: Doctrine\ORM\EntityRepository
+		repositoryClass: null
 		allCollectionsSelectable: true
+		objectManagerLoader: null
 
 conditionalTags:
 	PHPStan\Reflection\Doctrine\DoctrineSelectableClassReflectionExtension:
@@ -20,8 +21,6 @@ services:
 			- phpstan.broker.dynamicMethodReturnTypeExtension
 	-
 		class: PHPStan\Type\Doctrine\ObjectManagerGetRepositoryDynamicReturnTypeExtension
-		arguments:
-			repositoryClass: %doctrine.repositoryClass%
 		tags:
 			- phpstan.broker.dynamicMethodReturnTypeExtension
 	-
@@ -34,7 +33,10 @@ services:
 			- phpstan.broker.dynamicMethodReturnTypeExtension
 	-
 		class: PHPStan\Type\Doctrine\ManagerRegistryGetRepositoryDynamicReturnTypeExtension
-		arguments:
-			repositoryClass: %doctrine.repositoryClass%
 		tags:
 			- phpstan.broker.dynamicMethodReturnTypeExtension
+	-
+		class: PHPStan\Type\Doctrine\ObjectMetadataResolver
+		arguments:
+			objectManagerLoader: %doctrine.objectManagerLoader%
+			repositoryClass: %doctrine.repositoryClass%
diff --git a/src/Type/Doctrine/GetRepositoryDynamicReturnTypeExtension.php b/src/Type/Doctrine/GetRepositoryDynamicReturnTypeExtension.php
index ffac342b..f8412a49 100644
--- a/src/Type/Doctrine/GetRepositoryDynamicReturnTypeExtension.php
+++ b/src/Type/Doctrine/GetRepositoryDynamicReturnTypeExtension.php
@@ -13,12 +13,12 @@
 abstract class GetRepositoryDynamicReturnTypeExtension implements \PHPStan\Type\DynamicMethodReturnTypeExtension
 {
 
-	/** @var string */
-	private $repositoryClass;
+	/** @var ObjectMetadataResolver */
+	private $metadataResolver;
 
-	public function __construct(string $repositoryClass)
+	public function __construct(ObjectMetadataResolver $metadataResolver)
 	{
-		$this->repositoryClass = $repositoryClass;
+		$this->metadataResolver = $metadataResolver;
 	}
 
 	public function isMethodSupported(MethodReflection $methodReflection): bool
@@ -42,7 +42,10 @@ public function getTypeFromMethodCall(
 			return new MixedType();
 		}
 
-		return new ObjectRepositoryType($argType->getValue(), $this->repositoryClass);
+		$objectName = $argType->getValue();
+		$repositoryClass = $this->metadataResolver->getRepositoryClass($objectName);
+
+		return new ObjectRepositoryType($objectName, $repositoryClass);
 	}
 
 }
diff --git a/src/Type/Doctrine/ObjectMetadataResolver.php b/src/Type/Doctrine/ObjectMetadataResolver.php
new file mode 100644
index 00000000..acb9a578
--- /dev/null
+++ b/src/Type/Doctrine/ObjectMetadataResolver.php
@@ -0,0 +1,72 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Type\Doctrine;
+
+use Doctrine\Common\Persistence\ObjectManager;
+use RuntimeException;
+use function file_exists;
+use function is_readable;
+
+final class ObjectMetadataResolver
+{
+
+	/** @var ?ObjectManager */
+	private $objectManager;
+
+	/** @var string */
+	private $repositoryClass;
+
+	public function __construct(?string $objectManagerLoader, ?string $repositoryClass)
+	{
+		if ($objectManagerLoader !== null) {
+			$this->objectManager = $this->getObjectManager($objectManagerLoader);
+		}
+		if ($repositoryClass !== null) {
+			$this->repositoryClass = $repositoryClass;
+		} elseif ($this->objectManager !== null && get_class($this->objectManager) === 'Doctrine\ODM\MongoDB\DocumentManager') {
+			$this->repositoryClass = 'Doctrine\ODM\MongoDB\DocumentRepository';
+		} else {
+			$this->repositoryClass = 'Doctrine\ORM\EntityRepository';
+		}
+	}
+
+	/**
+	 * @phpcsSuppress SlevomatCodingStandard.TypeHints.TypeHintDeclaration.MissingReturnTypeHint
+	 * @param string $objectManagerLoader
+	 * @return ObjectManager
+	 */
+	private function getObjectManager(string $objectManagerLoader)
+	{
+		if (! file_exists($objectManagerLoader) && ! is_readable($objectManagerLoader)) {
+			throw new RuntimeException('Object manager could not be loaded');
+		}
+
+		return require $objectManagerLoader;
+	}
+
+	public function getRepositoryClass(string $className): string
+	{
+		if ($this->objectManager === null) {
+			return $this->repositoryClass;
+		}
+
+		$metadata = $this->objectManager->getClassMetadata($className);
+
+		$ormMetadataClass = 'Doctrine\ORM\Mapping\ClassMetadata';
+		if ($metadata instanceof $ormMetadataClass) {
+			/** @var \Doctrine\ORM\Mapping\ClassMetadata $ormMetadata */
+			$ormMetadata = $metadata;
+			return $ormMetadata->customRepositoryClassName ?? $this->repositoryClass;
+		}
+
+		$odmMetadataClass = 'Doctrine\ODM\MongoDB\Mapping\ClassMetadata';
+		if ($metadata instanceof $odmMetadataClass) {
+			/** @var \Doctrine\ODM\MongoDB\Mapping\ClassMetadata $odmMetadata */
+			$odmMetadata = $metadata;
+			return $odmMetadata->customRepositoryClassName ?? $this->repositoryClass;
+		}
+
+		return $this->repositoryClass;
+	}
+
+}
diff --git a/tests/DoctrineIntegration/ODM/DocumentManagerIntegrationTest.php b/tests/DoctrineIntegration/ODM/DocumentManagerIntegrationTest.php
index f46b795b..fccbceb4 100644
--- a/tests/DoctrineIntegration/ODM/DocumentManagerIntegrationTest.php
+++ b/tests/DoctrineIntegration/ODM/DocumentManagerIntegrationTest.php
@@ -16,6 +16,7 @@ public function dataTopics(): array
 			['documentManagerDynamicReturn'],
 			['documentRepositoryDynamicReturn'],
 			['documentManagerMergeReturn'],
+			['customRepositoryUsage'],
 		];
 	}
 
diff --git a/tests/DoctrineIntegration/ODM/data/customRepositoryUsage-2.json b/tests/DoctrineIntegration/ODM/data/customRepositoryUsage-2.json
new file mode 100644
index 00000000..47d27e81
--- /dev/null
+++ b/tests/DoctrineIntegration/ODM/data/customRepositoryUsage-2.json
@@ -0,0 +1,7 @@
+[
+    {
+        "message": "Call to an undefined method PHPStan\\DoctrineIntegration\\ODM\\CustomRepositoryUsage\\MyRepository::nonexistant().",
+        "line": 31,
+        "ignorable": true
+    }
+]
\ No newline at end of file
diff --git a/tests/DoctrineIntegration/ODM/data/customRepositoryUsage.php b/tests/DoctrineIntegration/ODM/data/customRepositoryUsage.php
new file mode 100644
index 00000000..72c4e498
--- /dev/null
+++ b/tests/DoctrineIntegration/ODM/data/customRepositoryUsage.php
@@ -0,0 +1,64 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\DoctrineIntegration\ODM\CustomRepositoryUsage;
+
+use Doctrine\ODM\MongoDB\DocumentManager;
+use Doctrine\ODM\MongoDB\DocumentRepository;
+use Doctrine\ODM\MongoDB\Mapping\Annotations\Document;
+use Doctrine\ODM\MongoDB\Mapping\Annotations\Id;
+use RuntimeException;
+
+class Example
+{
+	/**
+	 * @var MyRepository
+	 */
+	private $repository;
+
+	public function __construct(DocumentManager $documentManager)
+	{
+		$this->repository = $documentManager->getRepository(MyDocument::class);
+	}
+
+	public function get(): void
+	{
+		$test = $this->repository->get('testing');
+		$test->doSomethingElse();
+	}
+
+	public function nonexistant(): void
+	{
+		$this->repository->nonexistant();
+	}
+}
+
+/**
+ * @Document(repositoryClass=MyRepository::class)
+ */
+class MyDocument
+{
+	/**
+	 * @Id(strategy="NONE", type="string")
+	 *
+	 * @var string
+	 */
+	private $id;
+
+	public function doSomethingElse(): void
+	{
+	}
+}
+
+class MyRepository extends DocumentRepository
+{
+	public function get(string $id): MyDocument
+	{
+		$document = $this->find($id);
+
+		if ($document === null) {
+			throw new RuntimeException('Not found...');
+		}
+
+		return $document;
+	}
+}
diff --git a/tests/DoctrineIntegration/ODM/document-manager.php b/tests/DoctrineIntegration/ODM/document-manager.php
new file mode 100644
index 00000000..403a6ab6
--- /dev/null
+++ b/tests/DoctrineIntegration/ODM/document-manager.php
@@ -0,0 +1,29 @@
+<?php declare(strict_types = 1);
+
+use Doctrine\Common\Annotations\AnnotationReader;
+use Doctrine\Common\Annotations\AnnotationRegistry;
+use Doctrine\Common\Cache\ArrayCache;
+use Doctrine\ODM\MongoDB\Configuration;
+use Doctrine\ODM\MongoDB\DocumentManager;
+use Doctrine\ODM\MongoDB\Mapping\Driver\AnnotationDriver;
+
+AnnotationRegistry::registerUniqueLoader('class_exists');
+
+$config = new Configuration();
+$config->setProxyDir(__DIR__);
+$config->setProxyNamespace('PHPstan\Doctrine\OdmProxies');
+$config->setMetadataCacheImpl(new ArrayCache());
+$config->setHydratorDir(__DIR__);
+$config->setHydratorNamespace('PHPstan\Doctrine\OdmHydrators');
+
+$config->setMetadataDriverImpl(
+	new AnnotationDriver(
+		new AnnotationReader(),
+		[__DIR__ . '/data']
+	)
+);
+
+return DocumentManager::create(
+	null,
+	$config
+);
diff --git a/tests/DoctrineIntegration/ODM/phpstan.neon b/tests/DoctrineIntegration/ODM/phpstan.neon
index 446f214a..c83c9fb1 100644
--- a/tests/DoctrineIntegration/ODM/phpstan.neon
+++ b/tests/DoctrineIntegration/ODM/phpstan.neon
@@ -3,4 +3,4 @@ includes:
 
 parameters:
 	doctrine:
-		repositoryClass: Doctrine\ODM\MongoDB\DocumentRepository
+		objectManagerLoader: tests/DoctrineIntegration/ODM/document-manager.php
diff --git a/tests/DoctrineIntegration/ORM/EntityManagerIntegrationTest.php b/tests/DoctrineIntegration/ORM/EntityManagerIntegrationTest.php
index a6353a59..ab226b07 100644
--- a/tests/DoctrineIntegration/ORM/EntityManagerIntegrationTest.php
+++ b/tests/DoctrineIntegration/ORM/EntityManagerIntegrationTest.php
@@ -16,6 +16,7 @@ public function dataTopics(): array
 			['entityManagerDynamicReturn'],
 			['entityRepositoryDynamicReturn'],
 			['entityManagerMergeReturn'],
+			['customRepositoryUsage'],
 		];
 	}
 
diff --git a/tests/DoctrineIntegration/ORM/data/customRepositoryUsage-2.json b/tests/DoctrineIntegration/ORM/data/customRepositoryUsage-2.json
new file mode 100644
index 00000000..c89ab944
--- /dev/null
+++ b/tests/DoctrineIntegration/ORM/data/customRepositoryUsage-2.json
@@ -0,0 +1,7 @@
+[
+    {
+        "message": "Call to an undefined method PHPStan\\DoctrineIntegration\\ORM\\CustomRepositoryUsage\\MyRepository::nonexistant().",
+        "line": 30,
+        "ignorable": true
+    }
+]
\ No newline at end of file
diff --git a/tests/DoctrineIntegration/ORM/data/customRepositoryUsage.php b/tests/DoctrineIntegration/ORM/data/customRepositoryUsage.php
new file mode 100644
index 00000000..8580916f
--- /dev/null
+++ b/tests/DoctrineIntegration/ORM/data/customRepositoryUsage.php
@@ -0,0 +1,65 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\DoctrineIntegration\ORM\CustomRepositoryUsage;
+
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityRepository;
+use Doctrine\ORM\Mapping as ORM;
+use RuntimeException;
+
+class Example
+{
+	/**
+	 * @var MyRepository
+	 */
+	private $repository;
+
+	public function __construct(EntityManagerInterface $entityManager)
+	{
+		$this->repository = $entityManager->getRepository(MyEntity::class);
+	}
+
+	public function get(): void
+	{
+		$test = $this->repository->get(1);
+		$test->doSomethingElse();
+	}
+
+	public function nonexistant(): void
+	{
+		$this->repository->nonexistant();
+	}
+}
+
+/**
+ * @ORM\Entity(repositoryClass=MyRepository::class)
+ */
+class MyEntity
+{
+	/**
+	 * @ORM\Id()
+	 * @ORM\GeneratedValue()
+	 * @ORM\Column(type="integer")
+	 *
+	 * @var int
+	 */
+	private $id;
+
+	public function doSomethingElse(): void
+	{
+	}
+}
+
+class MyRepository extends EntityRepository
+{
+	public function get(int $id): MyEntity
+	{
+		$entity = $this->find($id);
+
+		if ($entity === null) {
+			throw new RuntimeException('Not found...');
+		}
+
+		return $entity;
+	}
+}
diff --git a/tests/DoctrineIntegration/ORM/entity-manager.php b/tests/DoctrineIntegration/ORM/entity-manager.php
new file mode 100644
index 00000000..45e13b3a
--- /dev/null
+++ b/tests/DoctrineIntegration/ORM/entity-manager.php
@@ -0,0 +1,30 @@
+<?php declare(strict_types = 1);
+
+use Doctrine\Common\Annotations\AnnotationReader;
+use Doctrine\Common\Annotations\AnnotationRegistry;
+use Doctrine\Common\Cache\ArrayCache;
+use Doctrine\ORM\Configuration;
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\Mapping\Driver\AnnotationDriver;
+
+AnnotationRegistry::registerUniqueLoader('class_exists');
+
+$config = new Configuration();
+$config->setProxyDir(__DIR__);
+$config->setProxyNamespace('PHPstan\Doctrine\OrmProxies');
+$config->setMetadataCacheImpl(new ArrayCache());
+
+$config->setMetadataDriverImpl(
+	new AnnotationDriver(
+		new AnnotationReader(),
+		[__DIR__ . '/data']
+	)
+);
+
+return EntityManager::create(
+	[
+		'driver' => 'pdo_sqlite',
+		'memory' => true,
+	],
+	$config
+);
diff --git a/tests/DoctrineIntegration/ORM/phpstan.neon b/tests/DoctrineIntegration/ORM/phpstan.neon
index e6dd2808..80883c95 100644
--- a/tests/DoctrineIntegration/ORM/phpstan.neon
+++ b/tests/DoctrineIntegration/ORM/phpstan.neon
@@ -1,2 +1,6 @@
 includes:
 	- ../../../extension.neon
+
+parameters:
+	doctrine:
+		objectManagerLoader: tests/DoctrineIntegration/ORM/entity-manager.php