diff --git a/packages/Webkul/Shop/src/Http/Controllers/CartController.php b/packages/Webkul/Shop/src/Http/Controllers/CartController.php
index a996d2fe8..ac88f9e0d 100755
--- a/packages/Webkul/Shop/src/Http/Controllers/CartController.php
+++ b/packages/Webkul/Shop/src/Http/Controllers/CartController.php
@@ -2,24 +2,24 @@
 
 namespace Webkul\Shop\Http\Controllers;
 
+use Cart;
+use Illuminate\Support\Facades\Event;
 use Illuminate\Support\Facades\Log;
+use Webkul\Checkout\Contracts\Cart as CartModel;
 use Webkul\Customer\Repositories\WishlistRepository;
 use Webkul\Product\Repositories\ProductRepository;
-use Webkul\Checkout\Contracts\Cart as CartModel;
-use Illuminate\Support\Facades\Event;
-use Cart;
 
 class CartController extends Controller
 {
     /**
-     * WishlistRepository Repository object
+     * Wishlist repository instance.
      *
      * @var \Webkul\Customer\Repositories\WishlistRepository
      */
     protected $wishlistRepository;
 
     /**
-     * ProductRepository object
+     * Product repository instance.
      *
      * @var \Webkul\Product\Repositories\ProductRepository
      */
@@ -35,9 +35,10 @@ class CartController extends Controller
     public function __construct(
         WishlistRepository $wishlistRepository,
         ProductRepository $productRepository
-    )
-    {
-        $this->middleware('customer')->only(['moveToWishlist']);
+    ) {
+        $this->middleware('throttle:5,1')->only('applyCoupon');
+
+        $this->middleware('customer')->only('moveToWishlist');
 
         $this->wishlistRepository = $wishlistRepository;
 
@@ -86,13 +87,15 @@ class CartController extends Controller
                     return redirect()->route('shop.checkout.onepage.index');
                 }
             }
-        } catch(\Exception $e) {
+        } catch (\Exception $e) {
             session()->flash('warning', __($e->getMessage()));
 
             $product = $this->productRepository->find($id);
 
-            Log::error('Shop CartController: ' . $e->getMessage(),
-                ['product_id' => $id, 'cart_id' => cart()->getCart() ?? 0]);
+            Log::error(
+                'Shop CartController: ' . $e->getMessage(),
+                ['product_id' => $id, 'cart_id' => cart()->getCart() ?? 0]
+            );
 
             return redirect()->route('shop.productOrCategory.index', $product->url_key);
         }
@@ -101,7 +104,7 @@ class CartController extends Controller
     }
 
     /**
-     * Removes the item from the cart if it exists
+     * Removes the item from the cart if it exists.
      *
      * @param  int  $itemId
      * @return \Illuminate\Http\Response
@@ -130,7 +133,7 @@ class CartController extends Controller
             if ($result) {
                 session()->flash('success', trans('shop::app.checkout.cart.quantity.success'));
             }
-        } catch(\Exception $e) {
+        } catch (\Exception $e) {
             session()->flash('error', trans($e->getMessage()));
         }
 
@@ -159,10 +162,10 @@ class CartController extends Controller
     }
 
     /**
-     * Apply coupon to the cart
+     * Apply coupon to the cart.
      *
      * @return \Illuminate\Http\Response
-    */
+     */
     public function applyCoupon()
     {
         $couponCode = request()->get('code');
@@ -194,10 +197,10 @@ class CartController extends Controller
     }
 
     /**
-     * Apply coupon to the cart
+     * Remove applied coupon from the cart.
      *
      * @return \Illuminate\Http\Response
-    */
+     */
     public function removeCoupon()
     {
         Cart::removeCouponCode()->collectTotals();
@@ -210,10 +213,9 @@ class CartController extends Controller
 
     /**
      * Returns true, if result of adding product to cart
-     * is an array and contains a key "warning" or "info"
+     * is an array and contains a key "warning" or "info".
      *
      * @param  array  $result
-     *
      * @return boolean
      */
     private function onFailureAddingToCart($result): bool