diff --git a/src/CoreShop/Component/Core/Model/ProductStoreValues.php b/src/CoreShop/Component/Core/Model/ProductStoreValues.php
index 14f33706e9..3756fa4b09 100644
--- a/src/CoreShop/Component/Core/Model/ProductStoreValues.php
+++ b/src/CoreShop/Component/Core/Model/ProductStoreValues.php
@@ -46,7 +46,7 @@ class ProductStoreValues extends AbstractResource implements ProductStoreValuesI
     protected $product;
 
     /**
-     * @var Collection|ProductUnitDefinitionPriceInterface[]
+     * @var Collection<int, ProductUnitDefinitionPriceInterface>|ProductUnitDefinitionPriceInterface[]
      */
     protected $productUnitDefinitionPrices;
 
diff --git a/src/CoreShop/Component/Product/Model/ProductUnitDefinitions.php b/src/CoreShop/Component/Product/Model/ProductUnitDefinitions.php
index 33eb7b1fe6..85ebd947b0 100644
--- a/src/CoreShop/Component/Product/Model/ProductUnitDefinitions.php
+++ b/src/CoreShop/Component/Product/Model/ProductUnitDefinitions.php
@@ -43,7 +43,7 @@ class ProductUnitDefinitions extends AbstractResource implements ProductUnitDefi
     protected $defaultUnitDefinition;
 
     /**
-     * @var Collection|ProductUnitDefinitionInterface[]
+     * @var Collection<int, ProductUnitDefinitionInterface>|ProductUnitDefinitionInterface[]
      */
     protected $unitDefinitions;