diff --git a/src/lib/GraphQL/Schema/MatrixFieldDefinitionMapper.php b/src/lib/GraphQL/Schema/MatrixFieldDefinitionMapper.php
index ed8ba4e..034d94d 100644
--- a/src/lib/GraphQL/Schema/MatrixFieldDefinitionMapper.php
+++ b/src/lib/GraphQL/Schema/MatrixFieldDefinitionMapper.php
@@ -13,7 +13,6 @@
 use Ibexa\Contracts\Core\Repository\Values\ContentType\FieldDefinition;
 use Ibexa\Contracts\GraphQL\Schema\Domain\Content\Mapper\FieldDefinition\FieldDefinitionMapper;
 use Ibexa\Core\Base\Exceptions\NotFoundException;
-use Ibexa\FieldTypeMatrix\FieldType\Mapper\FieldTypeToContentTypeStrategyInterface;
 use Ibexa\GraphQL\Schema\Domain\Content\Mapper\FieldDefinition\DecoratingFieldDefinitionMapper;
 use Ibexa\GraphQL\Schema\Domain\Content\Mapper\FieldDefinition\FieldDefinitionInputMapper;
 
@@ -38,7 +37,7 @@ public function __construct(
         iterable $strategies
     ) {
         parent::__construct($innerMapper);
-        
+
         $this->nameHelper = $nameHelper;
         $this->contentTypeService = $contentTypeService;
         $this->strategies = $strategies;