diff --git a/app/Models/Payment/OnlinePaymentHistory.php b/app/Models/Payment/OnlinePaymentHistory.php
index 6400ace..4303a44 100644
--- a/app/Models/Payment/OnlinePaymentHistory.php
+++ b/app/Models/Payment/OnlinePaymentHistory.php
@@ -27,7 +27,7 @@ use Illuminate\Database\Eloquent\Model;
  * @property string $username
  * @property int $online_paymantable_id
  * @property string $online_paymantable_type
- * @property $api_response
+ * @property ?array $api_response
  * @property \Illuminate\Support\Carbon $created_at
  * @property \Illuminate\Support\Carbon $updated_at
  */
@@ -41,4 +41,16 @@ class OnlinePaymentHistory extends Model
      * @var string
      */
     protected $table = 'online_payment_histories';
+
+    /**
+     * Get the attributes that should be cast.
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'api_response' => 'array',
+        ];
+    }
 }
diff --git a/app/Repos/Payment/Billing/HandlesBillingSyncing.php b/app/Repos/Payment/Billing/HandlesBillingSyncing.php
index 303b066..43847f6 100644
--- a/app/Repos/Payment/Billing/HandlesBillingSyncing.php
+++ b/app/Repos/Payment/Billing/HandlesBillingSyncing.php
@@ -18,7 +18,7 @@ trait HandlesBillingSyncing
         string $rrn,
         string $amount,
         string $pay_purpose,
-    ) {
+    ): mixed {
         $body = sprintf('{
             "ecomId": "%s",
             "agentId": "%s",
diff --git a/app/Repos/Payment/OnlinePaymentRepo.php b/app/Repos/Payment/OnlinePaymentRepo.php
index f04908e..0b5d794 100644
--- a/app/Repos/Payment/OnlinePaymentRepo.php
+++ b/app/Repos/Payment/OnlinePaymentRepo.php
@@ -186,6 +186,8 @@ class OnlinePaymentRepo
 
     /**
      * Successfully payment response
+     *
+     * @return array<string, mixed>
      */
     public static function successfulPaymentResponse(
         OnlinePaymentHistory $paymentHistory,
@@ -208,6 +210,8 @@ class OnlinePaymentRepo
 
     /**
      * Failed payment response
+     *
+     * @return array<string, mixed>
      */
     public static function failedPaymentResponse(
         OnlinePaymentHistory $paymentHistory,
@@ -230,6 +234,8 @@ class OnlinePaymentRepo
 
     /**
      * Resource not found
+     *
+     * @return array<string, mixed>
      */
     protected static function resourceNotFound(): array
     {
diff --git a/app/Repos/Payment/VisaMaster/HandlesVisaMasterPayments.php b/app/Repos/Payment/VisaMaster/HandlesVisaMasterPayments.php
index 84fa557..6f349c4 100644
--- a/app/Repos/Payment/VisaMaster/HandlesVisaMasterPayments.php
+++ b/app/Repos/Payment/VisaMaster/HandlesVisaMasterPayments.php
@@ -14,6 +14,8 @@ trait HandlesVisaMasterPayments
      * Check payment payment visa master
      *
      * @param  Request  $request
+     *
+     * @return array<string, string|bool>
      */
     public static function checkPaymentVisaMaster(Request $request): array
     {