diff --git a/composer.json b/composer.json
index fe5766f6..67298cb6 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
   },
   "require-dev": {
     "doctrine/annotations": "^2.0",
-    "doctrine/orm": "^2.9",
+    "doctrine/orm": "^2.9|^3.0",
     "matthiasnoback/symfony-dependency-injection-test": "^4.3 || ^5.0",
     "nyholm/psr7": "^1.5.1",
     "php-cs-fixer/shim": "^3.14",
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 5246556d..28e5679a 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -5,3 +5,5 @@ parameters:
 	paths:
 		- src
 		- tests
+	ignoreErrors:
+		- '#Call to static method getClass\(\) on an unknown class Doctrine\\Common\\Util\\ClassUtils#'
diff --git a/src/Services/MeilisearchService.php b/src/Services/MeilisearchService.php
index 4325388e..c899e212 100644
--- a/src/Services/MeilisearchService.php
+++ b/src/Services/MeilisearchService.php
@@ -5,6 +5,7 @@
 namespace Meilisearch\Bundle\Services;
 
 use Doctrine\Common\Util\ClassUtils;
+use Doctrine\ORM\Proxy\DefaultProxyClassNameResolver;
 use Doctrine\Persistence\ObjectManager;
 use Meilisearch\Bundle\Collection;
 use Meilisearch\Bundle\Engine;
@@ -236,7 +237,7 @@ private function getBaseClassName($objectOrClass): string
         }
 
         if (is_object($objectOrClass)) {
-            return ClassUtils::getClass($objectOrClass);
+            return self::resolveClass($objectOrClass);
         }
 
         return $objectOrClass;
@@ -306,7 +307,7 @@ private function getAggregatorsFromEntities(ObjectManager $objectManager, array
         $aggregators = [];
 
         foreach ($entities as $entity) {
-            $entityClassName = ClassUtils::getClass($entity);
+            $entityClassName = self::resolveClass($entity);
             if (array_key_exists($entityClassName, $this->entitiesAggregators)) {
                 foreach ($this->entitiesAggregators[$entityClassName] as $aggregator) {
                     $aggregators[] = new $aggregator(
@@ -367,4 +368,21 @@ private function assertIsSearchable(string $className): void
             throw new Exception('Class '.$className.' is not searchable.');
         }
     }
+
+    private static function resolveClass(object $object): string
+    {
+        static $resolver;
+
+        $resolver ??= (function () {
+            // Doctrine ORM v3+ compatibility
+            if (\class_exists(DefaultProxyClassNameResolver::class)) {
+                return fn (object $object) => DefaultProxyClassNameResolver::getClass($object);
+            }
+
+            // Legacy Doctrine ORM compatibility
+            return fn (object $object) => ClassUtils::getClass($object); // @codeCoverageIgnore
+        })();
+
+        return $resolver($object);
+    }
 }
diff --git a/tests/Dbal/Type/DummyObjectIdType.php b/tests/Dbal/Type/DummyObjectIdType.php
index 160f7f02..66f10d14 100644
--- a/tests/Dbal/Type/DummyObjectIdType.php
+++ b/tests/Dbal/Type/DummyObjectIdType.php
@@ -28,7 +28,9 @@ public function convertToPHPValue($value, AbstractPlatform $platform): ?DummyObj
         }
 
         if (!\is_string($value) && !is_int($value)) {
-            throw ConversionException::conversionFailedInvalidType($value, $this->getName(), ['null', 'string', 'int', DummyObjectId::class]);
+            $actualType = \get_debug_type($value);
+            $possibleTypes = ['null', 'string', 'int', self::class];
+            throw new ConversionException(\sprintf("Could not convert PHP value '%s' of type '%s' to type '%s'. Expected one of the following types: %s", $value, $actualType, $this->getName(), \implode(', ', $possibleTypes)));
         }
 
         return new DummyObjectId((int) $value);
@@ -48,7 +50,9 @@ public function convertToDatabaseValue($value, AbstractPlatform $platform): ?int
         }
 
         if (!\is_string($value) && !is_int($value)) {
-            throw ConversionException::conversionFailedInvalidType($value, $this->getName(), ['null', 'string', 'int', DummyObjectId::class]);
+            $actualType = \get_debug_type($value);
+            $possibleTypes = ['null', 'string', 'int', self::class];
+            throw new ConversionException(\sprintf("Could not convert PHP value '%s' of type '%s' to type '%s'. Expected one of the following types: %s", $value, $actualType, $this->getName(), \implode(', ', $possibleTypes)));
         }
 
         return (int) $value;