diff --git a/app/Models/DelayedGood.php b/app/Models/DelayedGood.php
index e61e508..d40023f 100644
--- a/app/Models/DelayedGood.php
+++ b/app/Models/DelayedGood.php
@@ -16,15 +16,18 @@ class DelayedGood extends Model
 
     protected $guarded = ['id'];
 
-    protected $casts = [
-        'stored_date' => 'date',
-        'payment_date' => 'date',
-        'quantity' => 'integer',
-        'unit_price' => 'integer',
-        'total_amount' => 'integer',
-        'paid_amount' => 'integer',
-        'is_paid' => 'boolean',
-    ];
+    protected function casts(): array
+    {
+        return [
+            'stored_date' => 'date',
+            'payment_date' => 'date',
+            'quantity' => 'integer',
+            'unit_price' => 'integer',
+            'total_amount' => 'integer',
+            'paid_amount' => 'integer',
+            'is_paid' => 'boolean',
+        ];
+    }
 
     public function customer(): BelongsTo
     {
diff --git a/app/Models/EggPrice.php b/app/Models/EggPrice.php
index 31ea348..1b7e6d1 100644
--- a/app/Models/EggPrice.php
+++ b/app/Models/EggPrice.php
@@ -13,9 +13,12 @@ class EggPrice extends Model
 
     protected $guarded = ['id'];
 
-    protected $casts = [
-        'price' => 'integer',
-    ];
+    protected function casts(): array
+    {
+        return [
+            'price' => 'integer',
+        ];
+    }
 
     public function unit(): BelongsTo
     {
diff --git a/app/Models/Expense.php b/app/Models/Expense.php
index c4ada37..956836d 100644
--- a/app/Models/Expense.php
+++ b/app/Models/Expense.php
@@ -14,7 +14,10 @@ class Expense extends Model implements HasMedia
 
     protected $guarded = ['id'];
 
-    protected $casts = [
-        'expense_date' => 'date',
-    ];
+    protected function casts(): array
+    {
+        return [
+            'expense_date' => 'date',
+        ];
+    }
 }
diff --git a/app/Models/FeedPurchase.php b/app/Models/FeedPurchase.php
index 9f77359..0c6db3e 100644
--- a/app/Models/FeedPurchase.php
+++ b/app/Models/FeedPurchase.php
@@ -16,10 +16,13 @@ class FeedPurchase extends Model
 
     protected $guarded = ['id'];
 
-    protected $casts = [
-        'purchase_date' => 'date',
-        'total_price' => 'integer',
-    ];
+    protected function casts(): array
+    {
+        return [
+            'purchase_date' => 'date',
+            'total_price' => 'integer',
+        ];
+    }
 
     public function items(): HasMany
     {
diff --git a/app/Models/FeedPurchaseItem.php b/app/Models/FeedPurchaseItem.php
index 18f457c..eb6e904 100644
--- a/app/Models/FeedPurchaseItem.php
+++ b/app/Models/FeedPurchaseItem.php
@@ -13,11 +13,14 @@ class FeedPurchaseItem extends Model
 
     protected $guarded = ['id'];
 
-    protected $casts = [
-        'quantity' => 'integer',
-        'unit_price' => 'integer',
-        'subtotal' => 'integer',
-    ];
+    protected function casts(): array
+    {
+        return [
+            'quantity' => 'integer',
+            'unit_price' => 'integer',
+            'subtotal' => 'integer',
+        ];
+    }
 
     protected function formattedUnitPrice(): Attribute
     {
diff --git a/app/Models/Order.php b/app/Models/Order.php
index f746358..bfb43d2 100644
--- a/app/Models/Order.php
+++ b/app/Models/Order.php
@@ -13,13 +13,16 @@ class Order extends Model
 
     protected $guarded = ['id'];
 
-    protected $casts = [
-        'order_date' => 'date',
-        'egg_quantity' => 'integer',
-        'unit_price' => 'integer',
-        'total_amount' => 'integer',
-        'discount' => 'integer',
-    ];
+    protected function casts(): array
+    {
+        return [
+            'order_date' => 'date',
+            'egg_quantity' => 'integer',
+            'unit_price' => 'integer',
+            'total_amount' => 'integer',
+            'discount' => 'integer',
+        ];
+    }
 
     public function customer(): BelongsTo
     {