diff --git a/README.md b/README.md
index 0b17a53..35b1cf4 100644
--- a/README.md
+++ b/README.md
@@ -88,6 +88,7 @@ Laravel 5.5+
 
 ## Table of contents
 * [Configuration Options](#configuration-options)
+* [Custom models](#custom-models)
 * [Drivers](#drivers)
 * Using the Package
     * [Cart Management](#cart-management)
@@ -103,38 +104,92 @@ Laravel 5.5+
 
 `cart_manager.php` file contains the following config options for the package:
 
-1. **driver :** *(default: DatabaseDriver)*
+1. **cart_model :** *(default: Cart)*
+The [cart model](#custom-models) that should be used. You can use the existing model or create your own.
+
+2. **cart_item_model :** *(default: CartItem)*
+The [cart item model](#custom-models) that should be used. You can use the existing model or create your own.
+
+3. **driver :** *(default: DatabaseDriver)*
 The [driver](#drivers) that should be used to store and retrieve cart details. You can use existing ones or create your own.
 
-2. **auth_guard :** *(default: web)*
+4. **auth_guard :** *(default: web)*
 The authentication guard that should be used to identify the logged in customer. This package can store carts for guest users as well as logged in users.
 
-3. **shipping_charges :** *(default: 10)*
+5. **shipping_charges :** *(default: 10)*
 The amount that should be applied as shipping of the order.
 
-4. **shipping_charges_threshold :** *(default: 100)*
+6. **shipping_charges_threshold :** *(default: 100)*
 The minimum order amount to avoid the shipping charges. Take a note that order amount is calculated as subtotal of the cart items - discount amount.
 
-5. **tax_percentage :** *(default: 6%)*
+7. **tax_percentage :** *(default: 6%)*
 Tax is applied on subtotal of the cart items - discount amount + shipping charges and rounded to 2 decimals.
 
-6. **round_off_to :** *(default: 0.05)*
+8. **round_off_to :** *(default: 0.05)*
 You may wish to round of the order amount to the nearest decimal point. Options are (0 or 0.05 or 0.1 or 0.5 or 1)
 
-7. **cookie_name :** *(default: cart_identifier)*
+9. **cookie_name :** *(default: cart_identifier)*
 The name of the cookie that this package stores to identify the guests of the web app and store their cart data.
 
-8. **cookie_lifetime :** *(default: 1 week)*
+10. **cookie_lifetime :** *(default: 1 week)*
 Number of minutes for which the cart cookie should be valid in customer's browser.
 
-9. **LC_MONETARY :** *(default: en_US.UTF-8)*
+11. **LC_MONETARY :** *(default: en_US.UTF-8)*
 This option is used to display the various totals of the cart with a currency symbol. We use php's native [money_format()](//php.net/manual/en/function.money-format.php) function to display currency with amount.
 
-10. **cart_data_validity :** *(default: 1 week) (Database driver only)*
+12. **cart_data_validity :** *(default: 1 week) (Database driver only)*
 You may wish to remove old/invalid cart data from the database. You can specify the validity period and run/schedule the [ClearCartDataCommand](#commands) for the same.
 
 **[⬆ back to top](#table-of-contents)**
 
+## Custom models
+
+You can use your own custom Cart and CartItem model that extends the default.
+
+Example for custom Cart model:
+
+```php
+namespace App;
+
+use Freshbitsweb\LaravelCartManager\Models\Cart;
+
+class CustomCart extends Cart
+{
+    // Set table to carts table
+    protected $table = 'carts';
+
+    // User relation
+    public function user()
+    {
+        return $this->belongsTo(User::class, 'auth_user', 'id');
+    }
+
+    // Coupon relation (Coupon class is not included in this package)
+    public function coupon()
+    {
+        return $this->belongsTo(Coupon::class, 'coupon_id', 'id');
+    }
+}
+```
+
+Example for custom CartItem model:
+
+```php
+namespace App;
+
+use Freshbitsweb\LaravelCartManager\Models\CartItem;
+
+class CustomCartItem extends CartItem
+{
+    protected $table = 'cart_items';
+
+    public function cart()
+    {
+        return $this->belongsTo(CustomCart::class, 'cart_id', 'id');
+    }
+}
+```
+
 ## Drivers
 
 You can  set the driver that should be used to store and retrieve cart details in the `cart_manager.php` config file. You can use existing ones or create your own driver.
diff --git a/config/cart_manager.php b/config/cart_manager.php
index 53f2237..2ff7ec6 100644
--- a/config/cart_manager.php
+++ b/config/cart_manager.php
@@ -1,6 +1,12 @@
 <?php
 
 return [
+    // Custom cart class
+    'cart_model' => Freshbitsweb\LaravelCartManager\Models\Cart::class,
+
+    // Custom cart item class
+    'cart_item_model' => Freshbitsweb\LaravelCartManager\Models\CartItem::class,
+
     // The driver that should be used to manage the cart (database/session/custom)
     'driver' => Freshbitsweb\LaravelCartManager\Drivers\DatabaseDriver::class,
 
diff --git a/src/CartManagerServiceProvider.php b/src/CartManagerServiceProvider.php
index 42363ca..87988a6 100644
--- a/src/CartManagerServiceProvider.php
+++ b/src/CartManagerServiceProvider.php
@@ -6,7 +6,7 @@
 use Freshbitsweb\LaravelCartManager\Core\Cart;
 use Freshbitsweb\LaravelCartManager\Contracts\CartDriver;
 use Freshbitsweb\LaravelCartManager\Observers\CartObserver;
-use Freshbitsweb\LaravelCartManager\Models\Cart as CartModel;
+use Freshbitsweb\LaravelCartManager\Contracts\Cart as CartContract;
 use Freshbitsweb\LaravelCartManager\Console\Commands\ClearCartDataCommand;
 
 class CartManagerServiceProvider extends ServiceProvider
@@ -30,7 +30,7 @@ public function boot()
             $this->commands([ClearCartDataCommand::class]);
         }
 
-        CartModel::observe(CartObserver::class);
+        resolve(config('cart_manager.cart_model'))::observe(CartObserver::class);
     }
 
     /**
@@ -48,6 +48,9 @@ public function register()
         // Bind the driver with contract
         $this->app->bind(CartDriver::class, $this->app['config']['cart_manager']['driver']);
 
+        // Bind the custom cart model with contract
+        $this->app->bind(CartContract::class, $this->app['config']['cart_manager']['cart_model']);
+
         // Bind the cart class
         $this->app->bind(Cart::class, function ($app) {
             return new Cart($app->make(CartDriver::class));
diff --git a/src/Console/Commands/ClearCartDataCommand.php b/src/Console/Commands/ClearCartDataCommand.php
index b5dd4bb..7c3b62e 100644
--- a/src/Console/Commands/ClearCartDataCommand.php
+++ b/src/Console/Commands/ClearCartDataCommand.php
@@ -5,8 +5,6 @@
 use Carbon\Carbon;
 use Illuminate\Console\Command;
 use Illuminate\Support\Facades\Schema;
-use Freshbitsweb\LaravelCartManager\Models\Cart;
-use Freshbitsweb\LaravelCartManager\Models\CartItem;
 
 class ClearCartDataCommand extends Command
 {
@@ -40,14 +38,14 @@ public function handle()
 
         $validHours = config('cart_manager.cart_data_validity');
 
-        $query = Cart::where('updated_at', '<', Carbon::now()->subHours($validHours));
+        $query = resolve(config('cart_manager.cart_model'))::where('updated_at', '<', Carbon::now()->subHours($validHours));
 
         $cartIds = $query->get(['id']);
 
         if ($cartIds->isNotEmpty()) {
             $cartsDeleted = $query->delete();
 
-            CartItem::whereIn('cart_id', $cartIds->pluck('id')->toArray())->delete();
+            resolve(config('cart_manager.cart_item_model'))::whereIn('cart_id', $cartIds->pluck('id')->toArray())->delete();
 
             $this->info("$cartsDeleted older cart record(s) removed from the table.");
         } else {
diff --git a/src/Contracts/Cart.php b/src/Contracts/Cart.php
new file mode 100644
index 0000000..bf4fb9c
--- /dev/null
+++ b/src/Contracts/Cart.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Freshbitsweb\LaravelCartManager\Contracts;
+
+interface Cart
+{
+    /**
+     * Get the items of the cart.
+     */
+    public function items();
+}
diff --git a/src/Contracts/CartItem.php b/src/Contracts/CartItem.php
new file mode 100644
index 0000000..3c52fe9
--- /dev/null
+++ b/src/Contracts/CartItem.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Freshbitsweb\LaravelCartManager\Contracts;
+
+interface CartItem
+{
+    /**
+     * Get the cart.
+     */
+    public function cart();
+}
diff --git a/src/Drivers/DatabaseDriver.php b/src/Drivers/DatabaseDriver.php
index b83995d..01ebaac 100644
--- a/src/Drivers/DatabaseDriver.php
+++ b/src/Drivers/DatabaseDriver.php
@@ -5,8 +5,7 @@
 use Illuminate\Support\Str;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Cookie;
-use Freshbitsweb\LaravelCartManager\Models\Cart;
-use Freshbitsweb\LaravelCartManager\Models\CartItem;
+use Freshbitsweb\LaravelCartManager\Contracts\Cart;
 use Freshbitsweb\LaravelCartManager\Contracts\CartDriver;
 
 class DatabaseDriver implements CartDriver
@@ -20,14 +19,14 @@ public function getCartData()
     {
         $selectColumns = ['id', 'subtotal', 'discount', 'discount_percentage', 'coupon_id', 'shipping_charges', 'net_total', 'tax', 'total', 'round_off', 'payable'];
 
-        $cartData = Cart::with($this->cartItemsQuery())
+        $cartData = resolve(config('cart_manager.cart_model'))::with($this->cartItemsQuery())
             ->where($this->cartIdentifier())
             ->first($selectColumns)
         ;
 
         // If there is no cart record for the logged in customer, try with cookie identifier
         if (! $cartData && Auth::guard(config('cart_manager.auth_guard'))->check()) {
-            $cartData = Cart::with($this->cartItemsQuery())
+            $cartData = resolve(config('cart_manager.cart_model'))::with($this->cartItemsQuery())
                 ->where($this->getCookieElement())
                 ->first($selectColumns)
             ;
@@ -68,7 +67,7 @@ protected function cartItemsQuery()
     protected function assignCustomerToCartRecord()
     {
         // Assign the logged in customer to the cart record
-        Cart::where($this->getCookieElement())->update([
+        resolve(config('cart_manager.cart_model'))::where($this->getCookieElement())->update([
             'auth_user' => Auth::guard(config('cart_manager.auth_guard'))->id(),
         ]);
     }
@@ -101,7 +100,7 @@ public function updateCart($cartId, $cartData)
     {
         $cartData = $this->arraySnakeCase($cartData);
 
-        Cart::where('id', $cartId)->update($cartData);
+        resolve(config('cart_manager.cart_model'))::where('id', $cartId)->update($cartData);
     }
 
     /**
@@ -116,7 +115,7 @@ public function addCartItem($cartId, $cartItem)
         $cartItem = $this->arraySnakeCase($cartItem);
 
         $cartItem['cart_id'] = $cartId;
-        CartItem::create($cartItem);
+        resolve(config('cart_manager.cart_item_model'))::create($cartItem);
     }
 
     /**
@@ -127,7 +126,7 @@ public function addCartItem($cartId, $cartItem)
      */
     public function removeCartItem($cartItemId)
     {
-        CartItem::destroy($cartItemId);
+        resolve(config('cart_manager.cart_item_model'))::destroy($cartItemId);
     }
 
     /**
@@ -140,7 +139,7 @@ protected function storeCartDetails($cartData)
     {
         $cartData = $this->arraySnakeCase($cartData);
 
-        $cart = Cart::updateOrCreate(
+        $cart = resolve(config('cart_manager.cart_model'))::updateOrCreate(
             $this->cartIdentifier(),
             array_merge($cartData, $this->getCookieElement())
         );
@@ -199,7 +198,7 @@ protected function getCookieElement()
      */
     public function setCartItemQuantity($cartItemId, $newQuantity)
     {
-        CartItem::where('id', $cartItemId)->update(['quantity' => $newQuantity]);
+        resolve(config('cart_manager.cart_item_model'))::where('id', $cartItemId)->update(['quantity' => $newQuantity]);
     }
 
     /**
@@ -209,7 +208,7 @@ public function setCartItemQuantity($cartItemId, $newQuantity)
      */
     public function clearData()
     {
-        $cart = Cart::where($this->cartIdentifier())->first();
+        $cart = resolve(config('cart_manager.cart_model'))::where($this->cartIdentifier())->first();
 
         if ($cart) {
             $cart->delete();
@@ -242,7 +241,7 @@ private function arraySnakeCase($array)
     public function updateItemsData($items)
     {
         $items->each(function ($item) {
-            CartItem::where('id', $item->id)->update([
+            resolve(config('cart_manager.cart_item_model'))::where('id', $item->id)->update([
                 'name' => $item->name,
                 'price' => $item->price,
                 'image' => $item->image,
diff --git a/src/Drivers/SessionDriver.php b/src/Drivers/SessionDriver.php
index c0af632..1335737 100644
--- a/src/Drivers/SessionDriver.php
+++ b/src/Drivers/SessionDriver.php
@@ -2,6 +2,7 @@
 
 namespace Freshbitsweb\LaravelCartManager\Drivers;
 
+use Freshbitsweb\LaravelCartManager\Contracts\Cart;
 use Freshbitsweb\LaravelCartManager\Contracts\CartDriver;
 
 class SessionDriver implements CartDriver
diff --git a/src/Models/Cart.php b/src/Models/Cart.php
index 9311006..10edf4a 100644
--- a/src/Models/Cart.php
+++ b/src/Models/Cart.php
@@ -3,8 +3,9 @@
 namespace Freshbitsweb\LaravelCartManager\Models;
 
 use Illuminate\Database\Eloquent\Model;
+use Freshbitsweb\LaravelCartManager\Contracts\Cart as CartContract;
 
-class Cart extends Model
+class Cart extends Model implements CartContract
 {
     /**
      * The attributes that are mass assignable.
@@ -21,6 +22,6 @@ class Cart extends Model
      */
     public function items()
     {
-        return $this->hasMany(CartItem::class);
+        return $this->hasMany(config('cart_manager.cart_item_model'));
     }
 }
diff --git a/src/Models/CartItem.php b/src/Models/CartItem.php
index 6c5def4..763fe9f 100644
--- a/src/Models/CartItem.php
+++ b/src/Models/CartItem.php
@@ -32,4 +32,9 @@ public function toArray()
             'quantity' => $this->quantity,
         ];
     }
+
+    public function cart()
+    {
+        return $this->belongsTo();
+    }
 }
diff --git a/src/Observers/CartObserver.php b/src/Observers/CartObserver.php
index 4ef03fd..300f238 100644
--- a/src/Observers/CartObserver.php
+++ b/src/Observers/CartObserver.php
@@ -2,17 +2,17 @@
 
 namespace Freshbitsweb\LaravelCartManager\Observers;
 
-use Freshbitsweb\LaravelCartManager\Models\Cart;
+use Freshbitsweb\LaravelCartManager\Contracts\Cart as CartContract;
 
 class CartObserver
 {
     /**
      * Listen to the Cart deleting event.
      *
-     * @param \Freshbitsweb\LaravelCartManager\Models\Cart $cart
+     * @param \Freshbitsweb\LaravelCartManager\Contracts\Cart $cart
      * @return void
      */
-    public function deleting(Cart $cart)
+    public function deleting(CartContract $cart)
     {
         $cart->items()->delete();
     }
diff --git a/tests/ClearCartDataCommandTest.php b/tests/ClearCartDataCommandTest.php
index 8a76f51..6a970d6 100644
--- a/tests/ClearCartDataCommandTest.php
+++ b/tests/ClearCartDataCommandTest.php
@@ -3,7 +3,6 @@
 namespace Freshbitsweb\LaravelCartManager\Test;
 
 use Carbon\Carbon;
-use Freshbitsweb\LaravelCartManager\Models\Cart;
 
 class ClearCartDataCommandTest extends TestCase
 {
@@ -26,7 +25,7 @@ public function clear_cart_command_removes_invalid_data()
 
         $validHours = config('cart_manager.cart_data_validity') + 1;
 
-        Cart::where('id', 1)->update(['updated_at' => Carbon::now()->subHours($validHours)]);
+        resolve(config('cart_manager.cart_model'))::where('id', 1)->update(['updated_at' => Carbon::now()->subHours($validHours)]);
 
         $this->artisan('lcm_carts:clear_old');