diff --git a/Helper/Data.php b/Helper/Data.php
index 1ffac69..fde2a88 100644
--- a/Helper/Data.php
+++ b/Helper/Data.php
@@ -71,6 +71,8 @@ class Data extends AbstractHelper
      */
     protected $_escaper;
 
+    protected $_serializer;
+
     public function __construct(
         \Magento\Framework\App\Helper\Context $context,
         \Magento\Store\Model\StoreManagerInterface $storeManager,
@@ -80,8 +82,8 @@ public function __construct(
         Encryptor $encryptor,
         \Magento\Framework\Escaper $_escaper,
         ProductFactory $productFactory,
-        CategoryFactory $categoryFactory
-
+        CategoryFactory $categoryFactory,
+        \GhoSter\AutoInstagramPost\Model\Serialize\Serializer $serializer
     )
     {
         $this->_storeManager = $storeManager;
@@ -92,6 +94,7 @@ public function __construct(
         $this->productFactory = $productFactory;
         $this->categoryFactory = $categoryFactory;
         $this->_escaper = $_escaper;
+        $this->_serializer = $serializer;
         parent::__construct($context);
     }
 
@@ -307,7 +310,7 @@ public function getCustomHashHashtags($store = null)
         );
 
         if ($hashTagConfig && $this->isEnableHashtag() && $this->isEnableCustomHashtag()) {
-            $hashTags = unserialize($hashTagConfig);
+            $hashTags = $this->_serializer->unserialize($hashTagConfig);
 
             if (is_array($hashTags)) {
                 foreach ($hashTags as $key => $hashTag) {
diff --git a/Model/Serialize/Serializer.php b/Model/Serialize/Serializer.php
new file mode 100644
index 0000000..051b9f3
--- /dev/null
+++ b/Model/Serialize/Serializer.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace GhoSter\AutoInstagramPost\Model\Serialize;
+
+class Serializer
+{
+    /**
+     * {@inheritDoc}
+     * @since 100.2.0
+     */
+    public function unserialize($string)
+    {
+        if ($this->is_serialized($string)) {
+            $string = $this->serialize($string);
+        }
+        $result = json_decode($string, true);
+        if (json_last_error() !== JSON_ERROR_NONE) {
+            throw new \InvalidArgumentException('Unable to unserialize value.');
+
+        }
+        return $result;
+    }
+
+
+    function is_serialized($value, &$result = null)
+    {
+        // Bit of a give away this one
+        if (!is_string($value)) {
+            return false;
+        }
+        // Serialized false, return true. unserialize() returns false on an
+        // invalid string or it could return false if the string is serialized
+        // false, eliminate that possibility.
+        if ($value === 'b:0;') {
+            $result = false;
+            return true;
+        }
+        $length = strlen($value);
+        $end = '';
+        switch ($value[0]) {
+            case 's':
+                if ($value[$length - 2] !== '"') {
+                    return false;
+                }
+            case 'b':
+            case 'i':
+            case 'd':
+                // This looks odd but it is quicker than isset()ing
+                $end .= ';';
+            case 'a':
+            case 'O':
+                $end .= '}';
+                if ($value[1] !== ':') {
+                    return false;
+                }
+                switch ($value[2]) {
+                    case 0:
+                    case 1:
+                    case 2:
+                    case 3:
+                    case 4:
+                    case 5:
+                    case 6:
+                    case 7:
+                    case 8:
+                    case 9:
+                        break;
+                    default:
+                        return false;
+                }
+            case 'N':
+                $end .= ';';
+                if ($value[$length - 1] !== $end[0]) {
+                    return false;
+                }
+                break;
+            default:
+                return false;
+        }
+        if (($result = @unserialize($value)) === false) {
+            $result = null;
+            return false;
+        }
+        return true;
+    }
+}
\ No newline at end of file