diff --git a/src/Cart.php b/src/Cart.php
index fc33359..95e1a06 100644
--- a/src/Cart.php
+++ b/src/Cart.php
@@ -646,7 +646,7 @@ class Cart
         $this->getConnection()->table($this->getTableName())->insert([
             'identifier' => $identifier,
             'instance'   => $instance,
-            'content'    => serialize($content),
+            'content'    => json_encode(serialize($content)),
             'created_at' => $this->createdAt ?: Carbon::now(),
             'updated_at' => Carbon::now(),
         ]);
@@ -676,7 +676,7 @@ class Cart
         $stored = $this->getConnection()->table($this->getTableName())
             ->where(['identifier'=> $identifier, 'instance' => $currentInstance])->first();
 
-        $storedContent = unserialize(data_get($stored, 'content'));
+        $storedContent = unserialize(json_decode(data_get($stored, 'content')));
 
         $this->instance(data_get($stored, 'instance'));
 
@@ -741,7 +741,7 @@ class Cart
         $stored = $this->getConnection()->table($this->getTableName())
             ->where(['identifier'=> $identifier, 'instance'=> $instance])->first();
 
-        $storedContent = unserialize($stored->content);
+        $storedContent = unserialize(json_decode($stored->content));
 
         foreach ($storedContent as $cartItem) {
             $this->addCartItem($cartItem, $keepDiscount, $keepTax, $dispatchAdd);