diff --git a/Helper/Data.php b/Helper/Data.php
index 23b071b..5ba48c4 100644
--- a/Helper/Data.php
+++ b/Helper/Data.php
@@ -33,6 +33,11 @@ class Data extends \Magento\Framework\App\Helper\AbstractHelper
      */
     protected $_priceHelper;
 
+    /**
+     * @var \Magento\Framework\Serialize\SerializerInterface
+     */
+    private $_serializer;
+
     /**
      * Constructor
      *
@@ -41,9 +46,11 @@ class Data extends \Magento\Framework\App\Helper\AbstractHelper
      */
     public function __construct(
         \Magento\Framework\App\Helper\Context $context,
-        \Magento\Framework\Pricing\Helper\Data $priceHelper
+        \Magento\Framework\Pricing\Helper\Data $priceHelper,
+        \Magento\Framework\Serialize\SerializerInterface $serializer
     ){
         $this->_priceHelper = $priceHelper;
+        $this->_serializer = $serializer;
         parent::__construct($context);
     }
 
@@ -58,7 +65,7 @@ public function getConversion($product)
         $productUnit = $product->getData('baseprice_product_unit');
         $referenceUnit = $product->getData('baseprice_reference_unit');
 
-        $configArray = unserialize($this->scopeConfig->getValue(
+        $configArray = $this->_serializer->unserialize($this->scopeConfig->getValue(
             self::CONVERSION_CONFIG_PATH,
             \Magento\Store\Model\ScopeInterface::SCOPE_STORE
         ));
diff --git a/Setup/InstallData.php b/Setup/InstallData.php
index 33b7ca2..20e237b 100644
--- a/Setup/InstallData.php
+++ b/Setup/InstallData.php
@@ -48,6 +48,11 @@ class InstallData implements InstallDataInterface
      */
     protected $_eavConfig;
 
+    /**
+     * @var \Magento\Framework\Serialize\SerializerInterface
+     */
+    private $_serializer;
+
     /**
      * Constructor
      *
@@ -60,12 +65,14 @@ public function __construct(
         \Magento\Eav\Setup\EavSetupFactory $eavSetupFactory,
         \Magento\Catalog\Api\ProductAttributeOptionManagementInterface $productAttributeOptionManagementInterface,
         \Magento\Config\Model\ResourceModel\Config $configResource,
-        \Magento\Eav\Model\Config $eavConfig
+        \Magento\Eav\Model\Config $eavConfig,
+        \Magento\Framework\Serialize\SerializerInterface $serializer
     ){
         $this->_eavSetupFactory = $eavSetupFactory;
         $this->_productAttributeOptionManagementInterface = $productAttributeOptionManagementInterface;
         $this->_configResource = $configResource;
         $this->_eavConfig = $eavConfig;
+        $this->_serializer = $serializer;
     }
 
     /**
@@ -268,7 +275,7 @@ protected function _setSystemConfiguration()
         // save system configuration
         $this->_configResource->saveConfig(
             \Magenerds\BasePrice\Helper\Data::CONVERSION_CONFIG_PATH,
-            serialize($data),
+            $this->_serializer->serialize($data),
             \Magento\Framework\App\Config\ScopeConfigInterface::SCOPE_TYPE_DEFAULT,
             0
         );