diff --git a/lib/widgets/desktop/desktop_shopping_cart_widget.dart b/lib/widgets/desktop/desktop_shopping_cart_widget.dart
index 3ba5179..adb564e 100644
--- a/lib/widgets/desktop/desktop_shopping_cart_widget.dart
+++ b/lib/widgets/desktop/desktop_shopping_cart_widget.dart
@@ -24,7 +24,7 @@ class DesktopShoppingCartWidgetState extends State<DesktopShoppingCartWidget> {
   @override
   Widget build(BuildContext context) {
     totalPrice = 0.0;
-    cartInfo = Utils.getCartInfoByBusiness(store.state.cartInfos, widget.business)!;
+    cartInfo = Utils.getCartInfoByBusiness(store.state.cartInfos, widget.business);
     if (cartInfo != null && cartInfo!.businessInfo!.id == widget.business.id) {
       totalPrice = cartInfo!.getTotalPrice();
     }
diff --git a/lib/widgets/desktop/shop_products.dart b/lib/widgets/desktop/shop_products.dart
index 1ce77d6..6119628 100644
--- a/lib/widgets/desktop/shop_products.dart
+++ b/lib/widgets/desktop/shop_products.dart
@@ -114,7 +114,7 @@ class ShopProductsState extends State<ShopProducts> {
           itemBuilder: (BuildContext context, int i) {
             CategoryProducts cp = _categoryProducts[i];
             int qtyInCategory = 0;
-            CartInfo cartInfo = Utils.getCartInfoByBusiness(store.state.cartInfos, _business)!;
+            CartInfo? cartInfo = Utils.getCartInfoByBusiness(store.state.cartInfos, _business);
             if (cartInfo != null &&
                 cartInfo.businessInfo!.id == _business.id &&
                 cartInfo.productList != null) {
diff --git a/lib/widgets/desktop/shopping_cart_widget.dart b/lib/widgets/desktop/shopping_cart_widget.dart
index 353ed96..67b472c 100644
--- a/lib/widgets/desktop/shopping_cart_widget.dart
+++ b/lib/widgets/desktop/shopping_cart_widget.dart
@@ -25,7 +25,7 @@ class ShoppingCartWidgetState extends State<ShoppingCartWidget> {
   @override
   Widget build(BuildContext context) {
     totalPrice = 0.0;
-    cartInfo = Utils.getCartInfoByBusiness(store.state.cartInfos, widget.business)!;
+    cartInfo = Utils.getCartInfoByBusiness(store.state.cartInfos, widget.business);
     if (cartInfo != null && cartInfo!.businessInfo!.id == widget.business.id) {
       totalPrice = cartInfo!.getTotalPrice();
     }
diff --git a/lib/widgets/mobile/shop.dart b/lib/widgets/mobile/shop.dart
index 5edf2af..3d6c23b 100644
--- a/lib/widgets/mobile/shop.dart
+++ b/lib/widgets/mobile/shop.dart
@@ -1136,8 +1136,8 @@ class ShopState extends State<Shop>
             itemBuilder: (BuildContext context, int i) {
               CategoryProducts cp = _categoryProducts![i];
               int qtyInCategory = 0;
-              CartInfo cartInfo =
-              Utils.getCartInfoByBusiness(store.state.cartInfos, _business!)!;
+              CartInfo? cartInfo =
+              Utils.getCartInfoByBusiness(store.state.cartInfos, _business!);
               if (cartInfo != null &&
                   cartInfo.businessInfo!.id == _business!.id &&
                   cartInfo.productList != null) {
diff --git a/lib/widgets/mobile/shopping_cart_bar.dart b/lib/widgets/mobile/shopping_cart_bar.dart
index 215fd1f..3fa6457 100644
--- a/lib/widgets/mobile/shopping_cart_bar.dart
+++ b/lib/widgets/mobile/shopping_cart_bar.dart
@@ -41,7 +41,7 @@ class ShoppingCartBarState extends State<ShoppingCartBar> {
   @override
   Widget build(BuildContext context) {
     totalPrice = 0.0;
-    cartInfo = Utils.getCartInfoByBusiness(store.state.cartInfos, widget.business)!;
+    cartInfo = Utils.getCartInfoByBusiness(store.state.cartInfos, widget.business);
     if (cartInfo != null && cartInfo!.businessInfo!.id == widget.business.id) {
       totalPrice = cartInfo!.getTotalPrice();
     }